{"id":2092,"date":"2025-08-18T01:07:07","date_gmt":"2025-08-18T01:07:07","guid":{"rendered":"https:\/\/gamingwithdaopa.ellatha.com\/eveonline\/?p=2092"},"modified":"2026-05-19T21:48:34","modified_gmt":"2026-05-19T21:48:34","slug":"isk-sp-efficiency-calculator","status":"publish","type":"post","link":"https:\/\/gamingwithdaopa.ellatha.com\/eveonline\/isk-sp-efficiency-calculator\/","title":{"rendered":"EVE Online ISK\/SP Efficiency Calculator: Compare Genius Accelerators vs Large Skill Injectors"},"content":{"rendered":"\r\n<p>Are you an EVE Online pilot wondering whether to buy Genius Cerebral Accelerators or Large Skill Injectors (LSIs) for the best ISK per Skill Point (SP) value? This interactive calculator helps you compare the efficiency based on current PLEX prices, LSI market prices, your Biology skill level, implants, and character SP total. It calculates ISK\/SP ratios, breakeven points, and recommends the better option for optimizing your skill training in New Eden.<\/p>\r\n<p>Enter your values below to see real-time comparisons. Keep in mind that EVE&#8217;s player-driven economy means prices change! Check in-game markets for the latest PLEX and LSI prices.<\/p>\r\n<div class=\"eve-calculator-container\">\r\n  <h2><i class=\"fa fa-rocket\"><\/i> EVE Skill Training Optimizer<\/h2>\r\n  <div class=\"input-row\">\r\n    <label for=\"plex_price\">PLEX Price (ISK \/ PLEX)<\/label>\r\n    <input type=\"text\" id=\"plex_price\" class=\"formatted-number\" value=\"4869000\" min=\"0\" step=\"100000\">\r\n  <\/div>\r\n  <div class=\"input-row\">\r\n    <label for=\"lsi_price\">LSI Price (ISK \/ LSI)<\/label>\r\n    <input type=\"text\" id=\"lsi_price\" class=\"formatted-number\" value=\"750000000\" min=\"0\" step=\"10000000\">\r\n  <\/div>\r\n  <div class=\"input-row\">\r\n    <label for=\"accel_cost\">Accelerator Cost (ISK)<\/label>\r\n    <input type=\"number\" id=\"accel_cost\" value=\"\" min=\"0\" step=\"1000000\" placeholder=\"Leave empty to use 180 PLEX \u00d7 PLEX price\">\r\n    <button id=\"use180\" type=\"button\" class=\"tiny\">Use 180 \u00d7 current PLEX<\/button>\r\n  <\/div>\r\n  <div class=\"input-row\">\r\n    <label for=\"biology_level\">Biology Skill Level<\/label>\r\n    <select id=\"biology_level\">\r\n      <option value=\"0\">0<\/option>\r\n      <option value=\"1\">1<\/option>\r\n      <option value=\"2\">2<\/option>\r\n      <option value=\"3\">3<\/option>\r\n      <option value=\"4\">4<\/option>\r\n      <option value=\"5\" selected>5<\/option>\r\n    <\/select>\r\n  <\/div>\r\n  <div class=\"input-row\">\r\n    <label for=\"implant\">Implant<\/label>\r\n    <select id=\"implant\">\r\n      <option value=\"1\">None<\/option>\r\n      <option value=\"1.05\">BY-805 (+5%)<\/option>\r\n      <option value=\"1.1\">BY-810 (+10%)<\/option>\r\n    <\/select>\r\n  <\/div>\r\n  <div class=\"input-row\">\r\n    <label for=\"sp_rate\">SP Gain Rate (SP \/ min)<\/label>\r\n    <input type=\"number\" id=\"sp_rate\" value=\"18\" min=\"1\" step=\"1\">\r\n    <span class=\"hint\">Default 18 SP\/min (e.g. +12 primary \/ +6 secondary). Change if your attributes differ.<\/span>\r\n  <\/div>\r\n  <div class=\"input-row\">\r\n    <label for=\"char_sp\">Character SP (in millions)<\/label>\r\n    <input type=\"number\" id=\"char_sp\" value=\"50\" min=\"0\" step=\"0.1\">\r\n  <\/div>\r\n  <div class=\"chart-controls\">\r\n    <label for=\"range_pct\">PLEX range (%) to plot around current PLEX<\/label>\r\n    <input type=\"number\" id=\"range_pct\" value=\"50\" min=\"1\" max=\"200\" step=\"1\">%\r\n    <button id=\"redraw\" class=\"tiny\">Redraw Chart<\/button>\r\n  <\/div>\r\n  <div class=\"price-update-row\">\r\n    <button id=\"updatePrices\" class=\"tiny\">Update Prices<\/button>\r\n    <p class=\"small note\">Note: Prices delayed; check in-game for real-time.<\/p>\r\n  <\/div>\r\n  <div id=\"loadingSpinner\" class=\"spinner\" style=\"display:none;\">\r\n    <div class=\"spinner-inner\"><\/div>\r\n  <\/div>\r\n  <div id=\"results\" class=\"results\">\r\n    <div class=\"card\" id=\"accel-card\">\r\n      <h3><i class=\"fa fa-clock-o\"><\/i> Genius Accelerator<\/h3>\r\n      <p>Duration: <strong id=\"accel-duration\"><\/strong> days<\/p>\r\n      <p>Extra SP: <strong id=\"accel-sp\"><\/strong><\/p>\r\n      <p>Cost (ISK): <strong id=\"accel-cost-display\"><\/strong><\/p>\r\n      <p>ISK \/ SP: <strong id=\"accel-isksp\"><\/strong><\/p>\r\n    <\/div>\r\n    <div class=\"card\" id=\"lsi-card\">\r\n      <h3><i class=\"fa fa-syringe\"><\/i> Large Skill Injector<\/h3>\r\n      <p>SP Yield: <strong id=\"lsi-sp\"><\/strong><\/p>\r\n      <p>Cost (ISK): <strong id=\"lsi-cost-display\"><\/strong><\/p>\r\n      <p>ISK \/ SP: <strong id=\"lsi-isksp\"><\/strong><\/p>\r\n    <\/div>\r\n    <div class=\"card\" id=\"compare-card\">\r\n      <h3><i class=\"fa fa-balance-scale\"><\/i> Comparison<\/h3>\r\n      <p>Better Option: <strong id=\"better-option\"><\/strong><\/p>\r\n      <p>Breakeven PLEX price (assuming Accelerator = 180 PLEX): <strong id=\"breakeven-plex\"><\/strong> ISK\/PLEX<\/p>\r\n      <p>Breakeven LSI price (given current Accelerator ISK cost): <strong id=\"breakeven-lsi\"><\/strong> ISK\/LSI<\/p>\r\n      <p class=\"small\">Notes: Breakeven values depend on Biology, implants, and SP\/min. Accelerator ISK\/SP depends on chosen Accelerator cost (you can use 180\u00d7PLEX or override).<\/p>\r\n    <\/div>\r\n  <\/div>\r\n  <div class=\"chart-area\">\r\n    <canvas id=\"plexChart\" width=\"760\" height=\"320\"><\/canvas>\r\n    <div id=\"chartTooltip\" class=\"chart-tooltip\" style=\"display:none;\"><\/div>\r\n  <\/div>\r\n<\/div>\r\n<style>\r\n\/* ***** SCOPED: only touches elements inside .eve-calculator-container\r\n   This prevents altering your theme FontAwesome icons (e.g., menu icons). *****\/\r\n.eve-calculator-container { max-width: 780px; margin: 18px auto; padding: 18px; border-radius: 12px;\r\n  background: linear-gradient(135deg,#0f0c29,#24243e); color: #fff; font-family: Arial, sans-serif;\r\n  box-shadow: 0 6px 20px rgba(0,0,0,0.5); animation: glow 2s infinite alternate;\r\n}\r\n@keyframes glow {\r\n  from { box-shadow: 0 0 10px rgba(0, 255, 255, 0.3); }\r\n  to { box-shadow: 0 0 30px rgba(0, 255, 255, 0.7); }\r\n}\r\n.eve-calculator-container h2 { color:#00f0f0; text-shadow:0 0 6px rgba(0,255,255,0.1); margin:0 0 12px; }\r\n.eve-calculator-container .input-row { display:flex; align-items:center; gap:12px; margin:10px 0; }\r\n.eve-calculator-container label { width:210px; font-weight:600; }\r\n.eve-calculator-container input[type=\"number\"], .eve-calculator-container input[type=\"text\"], .eve-calculator-container select { flex:1; padding:8px; border-radius:6px;\r\n  border:1px solid rgba(0,255,255,0.12); background: rgba(255,255,255,0.03); color:#fff;\r\n  transition: border-color 0.3s;\r\n}\r\n.eve-calculator-container input[type=\"number\"]:focus, .eve-calculator-container input[type=\"text\"]:focus, .eve-calculator-container select:focus {\r\n  border-color: #ff00ff;\r\n}\r\n.eve-calculator-container select option {\r\n  background: #24243e;\r\n  color: #fff;\r\n}\r\n.eve-calculator-container .hint { font-size:12px; color:#bcd; margin-left:8px; }\r\n.eve-calculator-container .tiny { margin-left:8px; padding:6px 8px; border-radius:6px; border:none; cursor:pointer; background:#0073e6; color:#fff; }\r\n.eve-calculator-container .chart-controls { display:flex; align-items:center; gap:8px; margin-top:10px; }\r\n.eve-calculator-container .price-update-row { display:flex; align-items:center; gap:12px; margin-top:10px; }\r\n.eve-calculator-container .price-update-row .small.note { margin:0; font-size:12px; color:#cbd; }\r\n.eve-calculator-container .results { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap:12px; flex-wrap:wrap; margin-top:14px; opacity: 0; transition: opacity 0.5s; }\r\n.eve-calculator-container .results.show { opacity: 1; }\r\n.eve-calculator-container .card { background: rgba(0,0,0,0.35); padding:12px; border-radius:8px; box-shadow: inset 0 0 8px rgba(0,255,255,0.03); }\r\n.eve-calculator-container .card h3 { margin:0 0 8px 0; font-size:16px; color:#bff; }\r\n.eve-calculator-container .card p { margin:6px 0; }\r\n.eve-calculator-container .small { font-size:12px; color:#cbd; }\r\n.eve-calculator-container .chart-area { margin-top:16px; position:relative; }\r\n.eve-calculator-container canvas { background:#0b0b12; border-radius:8px; display:block; width:100%; height:auto; }\r\n.eve-calculator-container .chart-tooltip { position:absolute; pointer-events:none; background:rgba(0,0,0,0.75); color:#fff; padding:8px; border-radius:6px; font-size:13px; border:1px solid rgba(255,255,255,0.06); }\r\n\/* Only the calculator's fontawesome icons *\/\r\n.eve-calculator-container .fa { color: #00f0f0; margin-right:6px; }\r\n\/* keep your theme icons untouched by scoping above *\/\r\n.eve-calculator-container .better { border: 2px solid #00ff00; animation: pulse 1s infinite; }\r\n@keyframes pulse {\r\n  0% { box-shadow: 0 0 0 rgba(0, 255, 0, 0.4); }\r\n  50% { box-shadow: 0 0 20px rgba(0, 255, 0, 0.8); }\r\n  100% { box-shadow: 0 0 0 rgba(0, 255, 0, 0.4); }\r\n}\r\n\/* Spinner styles *\/\r\n.eve-calculator-container .spinner {\r\n  position: fixed;\r\n  top: 50%;\r\n  left: 50%;\r\n  transform: translate(-50%, -50%);\r\n  z-index: 1000;\r\n  background: rgba(0,0,0,0.75);\r\n  padding: 20px;\r\n  border-radius: 50%;\r\n  box-shadow: 0 0 20px rgba(0,255,255,0.5);\r\n}\r\n.eve-calculator-container .spinner-inner {\r\n  border: 4px solid rgba(255,255,255,0.3);\r\n  border-top: 4px solid #00f0f0;\r\n  border-radius: 50%;\r\n  width: 40px;\r\n  height: 40px;\r\n  animation: spin 1s linear infinite;\r\n}\r\n@keyframes spin {\r\n  0% { transform: rotate(0deg); }\r\n  100% { transform: rotate(360deg); }\r\n}\r\n<\/style>\r\n<script>\r\n(function(){\r\n  \/\/ Helpers\r\n  const $ = id => document.getElementById(id);\r\n  function fmt(n, digits=0){ if (n === 'N\/A' || n === null || isNaN(n)) return 'N\/A'; return Number(n).toLocaleString(undefined, { maximumFractionDigits: digits, minimumFractionDigits: digits }); }\r\n  function addCommas(str) { return str.replace(\/\\B(?=(\\d{3})+(?!\\d))\/g, ','); }\r\n  function removeCommas(str) { return str.replace(\/,\/g, ''); }\r\n  \/\/ DOM elements\r\n  const plexIn = $('plex_price');\r\n  const lsiIn = $('lsi_price');\r\n  const accelCostIn = $('accel_cost');\r\n  const use180Btn = $('use180');\r\n  const bioIn = $('biology_level');\r\n  const implantIn = $('implant');\r\n  const spRateIn = $('sp_rate');\r\n  const charSpIn = $('char_sp');\r\n  const rangePctIn = $('range_pct');\r\n  const redrawBtn = $('redraw');\r\n  const accelDurationEl = $('accel-duration');\r\n  const accelSpEl = $('accel-sp');\r\n  const accelCostDisplay = $('accel-cost-display');\r\n  const accelIskSpEl = $('accel-isksp');\r\n  const lsiSpEl = $('lsi-sp');\r\n  const lsiCostDisplay = $('lsi-cost-display');\r\n  const lsiIskSpEl = $('lsi-isksp');\r\n  const betterOptionEl = $('better-option');\r\n  const breakevenPlexEl = $('breakeven-plex');\r\n  const breakevenLsiEl = $('breakeven-lsi');\r\n  const canvas = $('plexChart');\r\n  const ctx = canvas.getContext('2d');\r\n  const tooltip = $('chartTooltip');\r\n  const resultsDiv = $('results');\r\n  \/\/ Constants\r\n  const baseDays = 12;\r\n  \/\/ LSI yield by character SP\r\n  function computeLsiYield(charSp) {\r\n    \/\/ charSp in SP (not millions)\r\n    if (charSp < 5_000_000) return 500_000;\r\n    if (charSp < 50_000_000) return 400_000;\r\n    if (charSp < 80_000_000) return 300_000;\r\n    return 150_000;\r\n  }\r\n  \/\/ Main calculation &#038; UI update\r\n  function calculate(showChart=true) {\r\n    const plexPrice = parseFloat(removeCommas(plexIn.value)) || 0;\r\n    const lsiPrice = parseFloat(removeCommas(lsiIn.value)) || 0;\r\n    const accelCostUser = parseFloat(accelCostIn.value);\r\n    const bioLevel = parseInt(bioIn.value) || 0;\r\n    const implantMult = parseFloat(implantIn.value) || 1;\r\n    const spRate = parseFloat(spRateIn.value) || 18;\r\n    const charSp = (parseFloat(charSpIn.value) || 0) * 1_000_000;\r\n    \/\/ Accelerator: duration &#038; SP\r\n    const bioMult = 1 + (0.2 * bioLevel);\r\n    const totalMult = bioMult * implantMult;\r\n    const durationDays = baseDays * totalMult;\r\n    const durationMin = durationDays * 1440;\r\n    const accelSP = Math.round(durationMin * spRate);\r\n    \/\/ Accelerator cost: use user input (ISK) if provided, otherwise 180*plex\r\n    const accelCost = !isNaN(accelCostUser) ? accelCostUser : (180 * plexPrice);\r\n    \/\/ ISK\/SP\r\n    const accelIskSp = accelSP > 0 ? (accelCost \/ accelSP) : NaN;\r\n    \/\/ LSI\r\n    const lsiYield = computeLsiYield(charSp);\r\n    const lsiIskSp = lsiYield > 0 ? (lsiPrice \/ lsiYield) : NaN;\r\n    \/\/ Better option\r\n    let better = 'None';\r\n    if (!isNaN(accelIskSp) && !isNaN(lsiIskSp)) {\r\n      better = (accelIskSp < lsiIskSp) ? 'Accelerator' : 'LSI';\r\n    }\r\n    \/\/ Breakeven calculations:\r\n    \/\/ 1) Breakeven PLEX price assuming Accelerator is sold as 180 PLEX (solving accelIskSp = lsiIskSp, accelCost = 180 * plex)\r\n    \/\/ plex_breakeven = (lsiPrice \/ lsiYield) * (accelSP \/ 180)\r\n    const breakevenPlex = (lsiYield > 0 && accelSP > 0) ? ((lsiPrice \/ lsiYield) * (accelSP \/ 180)) : NaN;\r\n    \/\/ 2) Breakeven LSI price given current accelCost (ISK), i.e. lsi_price_breakeven = (accelCost \/ accelSP) * lsiYield\r\n    const breakevenLsi = (accelSP > 0 && lsiYield > 0) ? ((accelCost \/ accelSP) * lsiYield) : NaN;\r\n    \/\/ Update UI - formatted with commas\r\n    accelDurationEl.textContent = durationDays.toFixed(1);\r\n    accelSpEl.textContent = fmt(accelSP, 0);\r\n    accelCostDisplay.textContent = fmt(accelCost, 0);\r\n    accelIskSpEl.textContent = isFinite(accelIskSp) ? fmt(accelIskSp, 2) : 'N\/A';\r\n    lsiSpEl.textContent = fmt(lsiYield, 0);\r\n    lsiCostDisplay.textContent = fmt(lsiPrice, 0);\r\n    lsiIskSpEl.textContent = isFinite(lsiIskSp) ? fmt(lsiIskSp, 2) : 'N\/A';\r\n    betterOptionEl.textContent = better;\r\n    breakevenPlexEl.textContent = isFinite(breakevenPlex) ? fmt(breakevenPlex, 0) : 'N\/A';\r\n    breakevenLsiEl.textContent = isFinite(breakevenLsi) ? fmt(breakevenLsi, 0) : 'N\/A';\r\n    \/\/ Highlight better\r\n    $('accel-card').classList.remove('better');\r\n    $('lsi-card').classList.remove('better');\r\n    if (better === 'Accelerator') $('accel-card').classList.add('better');\r\n    else if (better === 'LSI') $('lsi-card').classList.add('better');\r\n    resultsDiv.classList.add('show');\r\n    \/\/ draw chart if requested\r\n    if (showChart) drawChart({ plexPrice, lsiIskSp, accelSP, lsiYield, accelCost });\r\n  }\r\n  \/\/ Reset accel cost to 180 * plex\r\n  use180Btn.addEventListener('click', () => {\r\n    const plexPrice = parseFloat(removeCommas(plexIn.value)) || 0;\r\n    accelCostIn.value = Math.round(180 * plexPrice);\r\n    calculate();\r\n  });\r\n  \/\/ inputs - live update\r\n  [plexIn, lsiIn, accelCostIn, bioIn, implantIn, spRateIn, charSpIn].forEach(el => el.addEventListener('input', () => calculate(true)));\r\n  redrawBtn.addEventListener('click', () => calculate(true));\r\n  \/\/ Chart drawing (pure canvas)\r\n  function drawChart({ plexPrice, lsiIskSp, accelSP, lsiYield, accelCost }) {\r\n    \/\/ Prepare range\r\n    const rangePct = Math.max(1, Math.min(200, parseFloat(rangePctIn.value) || 50));\r\n    const minPlex = Math.max(1, plexPrice * (1 - rangePct \/ 100));\r\n    const maxPlex = Math.max(minPlex + 1, plexPrice * (1 + rangePct \/ 100));\r\n    const steps = 80;\r\n    \/\/ Build data points: accel ISK\/SP as function of plex -> accelIskSp = (180 * plex) \/ accelSP\r\n    const plexValues = [];\r\n    const accelIskSpValues = [];\r\n    for (let i = 0; i <= steps; i++) {\r\n      const p = minPlex + (i \/ steps) * (maxPlex - minPlex);\r\n      plexValues.push(p);\r\n      accelIskSpValues.push(accelSP > 0 ? (180 * p) \/ accelSP : NaN);\r\n    }\r\n    \/\/ LSI constant line\r\n    const lsiLineY = lsiIskSp;\r\n    \/\/ Canvas sizing\r\n    const DPR = window.devicePixelRatio || 1;\r\n    const widthCSS = canvas.clientWidth;\r\n    const heightCSS = canvas.clientHeight;\r\n    canvas.width = Math.round(widthCSS * DPR);\r\n    canvas.height = Math.round(heightCSS * DPR);\r\n    ctx.setTransform(DPR, 0, 0, DPR, 0, 0);\r\n    ctx.clearRect(0,0, widthCSS, heightCSS);\r\n    \/\/ Margins\r\n    const margin = { left: 60, right: 24, top: 18, bottom: 46 };\r\n    const w = widthCSS - margin.left - margin.right;\r\n    const h = heightCSS - margin.top - margin.bottom;\r\n    \/\/ Y scale: determine min\/max from data\r\n    const allY = accelIskSpValues.concat([lsiLineY]).filter(v => isFinite(v));\r\n    const yMax = Math.max(...allY) * 1.08;\r\n    const yMin = Math.min(...allY) * 0.92;\r\n    const niceYMin = Math.max(0, yMin);\r\n    \/\/ Functions\r\n    const xFor = i => margin.left + (i \/ steps) * w;\r\n    const xForPlex = p => margin.left + ((p - minPlex) \/ (maxPlex - minPlex)) * w;\r\n    const yForVal = v => margin.top + h - ((v - niceYMin) \/ (yMax - niceYMin)) * h;\r\n    \/\/ Grid & axes\r\n    ctx.strokeStyle = 'rgba(255,255,255,0.06)';\r\n    ctx.lineWidth = 1;\r\n    ctx.beginPath();\r\n    \/\/ horizontal grid lines (5)\r\n    ctx.font = '12px Arial';\r\n    ctx.fillStyle = '#cfe';\r\n    ctx.textAlign = 'right';\r\n    for (let i = 0; i <= 5; i++) {\r\n      const val = niceYMin + (i\/5)*(yMax - niceYMin);\r\n      const y = yForVal(val);\r\n      ctx.moveTo(margin.left, y);\r\n      ctx.lineTo(margin.left + w, y);\r\n      \/\/ labels\r\n      ctx.fillStyle = '#bcd';\r\n      ctx.fillText(fmt(Math.round(val), 0), margin.left - 8, y + 4);\r\n    }\r\n    ctx.stroke();\r\n    \/\/ X axis labels (min, mid, max) - corrected label to ISK\/PLEX\r\n    ctx.fillStyle = '#bcd';\r\n    ctx.textAlign = 'center';\r\n    ctx.fillText(fmt(Math.round(minPlex),0) + ' ISK\/PLEX', margin.left, margin.top + h + 28);\r\n    ctx.fillText(fmt(Math.round((minPlex+maxPlex)\/2),0) + ' ISK\/PLEX', margin.left + w\/2, margin.top + h + 28);\r\n    ctx.fillText(fmt(Math.round(maxPlex),0) + ' ISK\/PLEX', margin.left + w, margin.top + h + 28);\r\n    \/\/ Draw accel ISK\/SP line\r\n    ctx.beginPath();\r\n    ctx.lineWidth = 2;\r\n    ctx.strokeStyle = '#00bfff';\r\n    for (let i = 0; i <= steps; i++) {\r\n      const x = xFor(i);\r\n      const y = yForVal(accelIskSpValues[i]);\r\n      if (i===0) ctx.moveTo(x,y); else ctx.lineTo(x,y);\r\n    }\r\n    ctx.stroke();\r\n    \/\/ Draw LSI horizontal line\r\n    if (isFinite(lsiLineY)) {\r\n      ctx.beginPath();\r\n      ctx.lineWidth = 2;\r\n      ctx.setLineDash([6,4]);\r\n      ctx.strokeStyle = '#ff7f7f';\r\n      ctx.moveTo(margin.left, yForVal(lsiLineY));\r\n      ctx.lineTo(margin.left + w, yForVal(lsiLineY));\r\n      ctx.stroke();\r\n      ctx.setLineDash([]);\r\n      \/\/ Label\r\n      ctx.fillStyle = '#ffb';\r\n      ctx.textAlign = 'left';\r\n      ctx.fillText('LSI ISK\/SP: ' + (isFinite(lsiLineY) ? fmt(lsiLineY,2) : 'N\/A'), margin.left + 8, yForVal(lsiLineY) - 8);\r\n    }\r\n    \/\/ Draw breakeven vertical line (where accel line crosses lsi)\r\n    \/\/ Solve for plex where (180*plex)\/accelSP = lsiIskSp => plex = (lsiIskSp * accelSP) \/ 180\r\n    let breakevenPlex = NaN;\r\n    if (isFinite(lsiLineY) && accelSP > 0) {\r\n      breakevenPlex = (lsiLineY * accelSP) \/ 180;\r\n      if (breakevenPlex >= minPlex && breakevenPlex <= maxPlex) {\r\n        const x = xForPlex(breakevenPlex);\r\n        ctx.beginPath();\r\n        ctx.strokeStyle = 'rgba(255,255,0,0.9)';\r\n        ctx.lineWidth = 1.5;\r\n        ctx.setLineDash([4,6]);\r\n        ctx.moveTo(x, margin.top);\r\n        ctx.lineTo(x, margin.top + h);\r\n        ctx.stroke();\r\n        ctx.setLineDash([]);\r\n        ctx.fillStyle = '#ffd';\r\n        ctx.textAlign = 'center';\r\n        ctx.fillText('Breakeven ~ ' + fmt(Math.round(breakevenPlex),0) + ' ISK\/PLEX', x, margin.top + 12);\r\n      }\r\n    }\r\n    \/\/ Legend\r\n    ctx.fillStyle = '#cfe';\r\n    ctx.textAlign = 'left';\r\n    ctx.fillText('Accelerator ISK\/SP (blue)', margin.left + 6, margin.top + 14);\r\n    ctx.fillStyle = '#ffb';\r\n    ctx.fillText('LSI ISK\/SP (dashed red)', margin.left + 200, margin.top + 14);\r\n    \/\/ Interactive hover handling - store sample points in closure\r\n    canvas._chartData = {\r\n      plexValues,\r\n      accelIskSpValues,\r\n      lsiIskSp: lsiLineY,\r\n      minPlex, maxPlex, xForPlex, yForVal, margin, w, h, steps, accelSP\r\n    };\r\n  }\r\n  \/\/ Mouse hover for tooltip\r\n  canvas.addEventListener('mousemove', function(e){\r\n    const rect = canvas.getBoundingClientRect();\r\n    const mouseX = e.clientX - rect.left;\r\n    const mouseY = e.clientY - rect.top;\r\n    const data = canvas._chartData;\r\n    if (!data) return;\r\n    \/\/ find nearest x index\r\n    const { plexValues, accelIskSpValues, steps, xForPlex, yForVal } = data;\r\n    \/\/ convert mouseX to closest index\r\n    const marginLeft = data.margin.left;\r\n    const w = data.w;\r\n    const relX = Math.max(0, Math.min(w, mouseX - marginLeft));\r\n    const idxF = relX \/ w * steps;\r\n    const idx = Math.round(idxF);\r\n    if (idx < 0 || idx > steps) { tooltip.style.display='none'; return; }\r\n    const plex = plexValues[idx];\r\n    const accelVal = accelIskSpValues[idx];\r\n    const lsiVal = data.lsiIskSp;\r\n    \/\/ position tooltip near mouse but keep inside container\r\n    tooltip.style.display = 'block';\r\n    const containerRect = canvas.parentElement.getBoundingClientRect();\r\n    let left = (e.clientX - containerRect.left) + 12;\r\n    if (left + 220 > containerRect.width) left = containerRect.width - 230;\r\n    let top = (e.clientY - containerRect.top) - 10;\r\n    if (top < 8) top = 8;\r\n    tooltip.style.left = left + 'px';\r\n    tooltip.style.top = top + 'px';\r\n    tooltip.innerHTML = `<strong>${fmt(Math.round(plex),0)} ISK\/PLEX<\/strong><br>\r\n      Accelerator ISK\/SP: ${isFinite(accelVal) ? fmt(accelVal,2) : 'N\/A'}<br>\r\n      LSI ISK\/SP: ${isFinite(lsiVal) ? fmt(lsiVal,2) : 'N\/A'}<br>\r\n      (Accel cost assumed = 180 \u00d7 ISK\/PLEX for this curve)`;\r\n  });\r\n  canvas.addEventListener('mouseleave', () => {\r\n    tooltip.style.display = 'none';\r\n  });\r\n  \/\/ Constants for ESI\r\n  const REGIONAL_MARKET_ID = 10000002; \/\/ The Forge for regional items like LSI\r\n  const GLOBAL_PLEX_MARKET_ID = 19000001; \/\/ Global PLEX market region\r\n  const JITA_STATION_ID = 4869000;\r\n  const PLEX_TYPE_ID = 44992;\r\n  const LSI_TYPE_ID = 40520;\r\n\r\n  \/\/ Helper to get min sell price for a type via ESI\r\n  async function getMinSellPrice(typeId) {\r\n    const isPlex = typeId === PLEX_TYPE_ID;\r\n    const regionId = isPlex ? GLOBAL_PLEX_MARKET_ID : REGIONAL_MARKET_ID;\r\n    const filterLocation = !isPlex; \/\/ Only filter for location on regional items\r\n\r\n    let minPrice = Infinity;\r\n    let page = 1;\r\n    while (true) {\r\n      const url = `https:\/\/esi.evetech.net\/v1\/markets\/${regionId}\/orders\/?datasource=tranquility&order_type=sell&page=${page}&type_id=${typeId}`;\r\n      const res = await fetch(url, {\r\n        headers: {\r\n          'User-Agent': 'EVE-Skill-Training-Optimizer (https:\/\/gamingwithdaopa.ellatha.com\/eveonline\/isk-sp-efficiency-calculator\/; webmaster@ellatha.com)',\r\n          'Accept': 'application\/json'\r\n        }\r\n      });\r\n      if (!res.ok) throw new Error(`ESI error: ${res.statusText}`);\r\n      const orders = await res.json();\r\n      for (const order of orders) {\r\n        if (!order.is_buy_order && (!filterLocation || order.location_id === JITA_STATION_ID)) {\r\n          if (order.price < minPrice) minPrice = order.price;\r\n        }\r\n      }\r\n      const totalPages = parseInt(res.headers.get('X-Pages') || '1');\r\n      if (page >= totalPages) break;\r\n      page++;\r\n    }\r\n    return minPrice === Infinity ? NaN : Math.round(minPrice); \/\/ Round to whole ISK\r\n  }\r\n\r\n  \/\/ Function to update prices from ESI\r\n  async function updatePrices() {\r\n    const button = $('updatePrices');\r\n    const spinner = $('loadingSpinner');\r\n    \r\n    try {\r\n      \/\/ Show spinner and disable button\r\n      spinner.style.display = 'block';\r\n      button.disabled = true;\r\n      button.textContent = 'Fetching...';\r\n      \r\n      \/\/ Fetch both in parallel for speed\r\n      const [plexPrice, lsiPrice] = await Promise.all([\r\n        getMinSellPrice(PLEX_TYPE_ID),\r\n        getMinSellPrice(LSI_TYPE_ID)\r\n      ]);\r\n      \r\n      \/\/ Update even if one is NaN\r\n      if (!isNaN(plexPrice)) plexIn.value = addCommas(plexPrice.toString());\r\n      if (!isNaN(lsiPrice)) lsiIn.value = addCommas(lsiPrice.toString());\r\n      \r\n      \/\/ Optionally update accel cost to 180 \u00d7 PLEX if empty and plexPrice available\r\n      if (!accelCostIn.value && !isNaN(plexPrice)) {\r\n        accelCostIn.value = Math.round(180 * plexPrice);\r\n      }\r\n      \r\n      \/\/ Recalculate and redraw\r\n      calculate(true);\r\n\r\n      \/\/ Alert if one failed\r\n      if (isNaN(plexPrice) || isNaN(lsiPrice)) {\r\n        alert('Partial failure: ' + (isNaN(plexPrice) ? 'No PLEX sell orders found. ' : '') + (isNaN(lsiPrice) ? 'No LSI sell orders found in Jita.' : ''));\r\n      }\r\n    } catch (error) {\r\n      alert('Failed to fetch prices from ESI: ' + error.message + '. Check connection, API status, or try later.');\r\n    } finally {\r\n      \/\/ Always hide spinner and re-enable button\r\n      spinner.style.display = 'none';\r\n      button.disabled = false;\r\n      button.textContent = 'Update Prices';\r\n    }\r\n  }\r\n\r\n  \/\/ Attach event listener\r\n  $('updatePrices').addEventListener('click', updatePrices);\r\n  \/\/ initial calc and draw\r\n  calculate(true);\r\n  \/\/ Expose calculate globally for debugging if needed\r\n  window.eveCalc = { calculate };\r\n\r\n  \/\/ Format number inputs with commas\r\n  const formattedInputs = document.querySelectorAll('.formatted-number');\r\n  formattedInputs.forEach(input => {\r\n    \/\/ Initial format\r\n    input.value = addCommas(input.value);\r\n    \/\/ On focus: remove commas for editing\r\n    input.addEventListener('focus', () => {\r\n      input.value = removeCommas(input.value);\r\n    });\r\n    \/\/ On blur: add commas back\r\n    input.addEventListener('blur', () => {\r\n      const num = parseFloat(removeCommas(input.value));\r\n      if (!isNaN(num)) {\r\n        input.value = addCommas(num.toString());\r\n      }\r\n      calculate(true);\r\n    });\r\n  });\r\n})();\r\n<\/script>\r\n","protected":false},"excerpt":{"rendered":"<p>Are you an EVE Online pilot wondering whether to buy Genius Cerebral Accelerators or Large Skill Injectors (LSIs) for the best ISK per Skill Point (SP) value? This interactive calculator helps you compare the efficiency based on current PLEX prices, LSI market prices, your Biology skill level, implants, and character SP total. It calculates ISK\/SP [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2101,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[17],"tags":[],"class_list":["post-2092","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-guides"],"yoast_head":"<title>EVE Online ISK\/SP Efficiency Calculator: Compare Genius Accelerators vs Large Skill Injectors<\/title>\r\n<meta name=\"description\" content=\"Are you an EVE Online pilot wondering whether to buy Genius Cerebral Accelerators or Large Skill Injectors (LSIs) for the best ISK per Skill Point (SP)\" \/>\r\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\r\n<link rel=\"canonical\" href=\"https:\/\/gamingwithdaopa.ellatha.com\/eveonline\/isk-sp-efficiency-calculator\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta 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