{"id":3126,"date":"2026-05-09T12:05:44","date_gmt":"2026-05-09T10:05:44","guid":{"rendered":"https:\/\/science-x.net\/?page_id=3126"},"modified":"2026-05-09T12:05:45","modified_gmt":"2026-05-09T10:05:45","slug":"space-suit-survival-time-calculator","status":"publish","type":"page","link":"https:\/\/science-x.net\/?page_id=3126","title":{"rendered":"Space Suit Survival Time Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-spacesuit-4bd2e\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Space Suit Survival Time Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Estimate how long life-support resources in a space suit could last based on oxygen, cooling, and battery limits.\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-spacesuit-form-4bd2e\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-suit-oxygen-4bd2e\">Oxygen supply<br>(hours)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-suit-oxygen-4bd2e\" type=\"number\" min=\"0.1\" step=\"0.1\" value=\"8\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Primary breathable oxygen duration.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-suit-cooling-4bd2e\">Cooling limit<br>(hours)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-suit-cooling-4bd2e\" type=\"number\" min=\"0.1\" step=\"0.1\" value=\"6\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Thermal control may fail before oxygen runs out.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-suit-battery-4bd2e\">Battery limit<br>(hours)<\/label>\n        <input class=\"eco-tool__input\" id=\"eco-suit-battery-4bd2e\" type=\"number\" min=\"0.1\" step=\"0.1\" value=\"7\" inputmode=\"decimal\" \/>\n        <div class=\"eco-tool__hint\">Power for suit systems and communications.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-suit-exertion-4bd2e\">Activity<br>level<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-suit-exertion-4bd2e\">\n          <option value=\"0.9\">Low<\/option>\n          <option value=\"1.0\" selected>Normal<\/option>\n          <option value=\"1.15\">High<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Hard work increases oxygen and cooling demand.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-suit-reserve-4bd2e\">Emergency reserve<br>included?<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-suit-reserve-4bd2e\">\n          <option value=\"no\">No<\/option>\n          <option value=\"yes\" selected>Yes<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Adds a small safety margin if available.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-suit-view-4bd2e\">Main result<br>view<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-suit-view-4bd2e\">\n          <option value=\"time\">Show time<\/option>\n          <option value=\"limit\">Show limiting factor<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">Choose how to display the main result.<\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__actions\">\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn\" id=\"eco-suit-calc-4bd2e\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-suit-reset-4bd2e\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-suit-error-4bd2e\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-suit-result-4bd2e\" hidden>\n    <h3 class=\"eco-tool__subtitle\">Result<\/h3>\n\n    <div class=\"eco-tool__cards\">\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Estimated survival limit<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-suit-main-4bd2e\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-suit-main-sub-4bd2e\"><\/div>\n      <\/div>\n\n      <div class=\"eco-tool__card\">\n        <div class=\"eco-tool__metric-label\">Limiting factor<\/div>\n        <div class=\"eco-tool__metric-value\" id=\"eco-suit-limit-4bd2e\">\u2014<\/div>\n        <div class=\"eco-tool__metric-sub\" id=\"eco-suit-limit-sub-4bd2e\"><\/div>\n      <\/div>\n    <\/div>\n\n    <div class=\"eco-tool__card eco-tool__card--wide\">\n      <div class=\"eco-tool__metric-label\">System comparison<\/div>\n      <div class=\"eco-tool__bars\" id=\"eco-suit-bars-4bd2e\"><\/div>\n      <div class=\"eco-tool__metric-sub eco-tool__muted\" id=\"eco-suit-tip-4bd2e\"><\/div>\n    <\/div>\n\n    <p class=\"eco-tool__note\">\n      Simplified educational estimate only. Real EVA safety depends on suit design, CO\u2082 removal, mission rules, medical condition, radiation, and environment.\n    <\/p>\n  <\/div>\n\n  <details class=\"eco-tool__details\">\n    <summary class=\"eco-tool__summary\">How we calculate<\/summary>\n    <div class=\"eco-tool__details-body\">\n      <p class=\"eco-tool__text\">\n        We adjust oxygen and cooling limits by activity level, optionally add a small emergency reserve, and use the shortest remaining time as the overall limit.\n      <\/p>\n      <ul class=\"eco-tool__list\" id=\"eco-suit-factors-4bd2e\"><\/ul>\n    <\/div>\n  <\/details>\n<\/div>\n\n<style>\n.eco-tool{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:16px}\n.eco-tool__header{margin-bottom:12px}\n.eco-tool__title{margin:0 0 8px}\n.eco-tool__lead{margin:0;opacity:.9}\n.eco-tool__form{margin-top:12px}\n.eco-tool__grid3{display:grid;grid-template-columns:1fr;gap:16px}\n@media (min-width:860px){.eco-tool__grid3{grid-template-columns:1fr 1fr 1fr}}\n.eco-tool__field{display:flex;flex-direction:column;gap:6px}\n.eco-tool__label{font-weight:600}\n.eco-tool__input{width:100%;height:44px;padding:0 12px;border:1px solid rgba(0,0,0,.20);border-radius:10px;background:#fff;box-sizing:border-box;font:inherit}\n.eco-tool select.eco-tool__input{appearance:none;-webkit-appearance:none;line-height:44px;padding-right:40px;background-image:linear-gradient(45deg,transparent 50%,rgba(0,0,0,.60) 50%),linear-gradient(135deg,rgba(0,0,0,.60) 50%,transparent 50%);background-position:calc(100% - 18px) 50%,calc(100% - 12px) 50%;background-size:6px 6px;background-repeat:no-repeat}\n.eco-tool__hint{font-size:.92em;opacity:.78;min-height:38px}\n.eco-tool__actions{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:16px}\n.eco-tool__btn{padding:10px 22px}\n.eco-tool__btn--ghost{background:transparent!important;border:1px solid rgba(0,0,0,.20)!important}\n.eco-tool__btn--ghost:hover,.eco-tool__btn--ghost:focus{background:rgba(0,0,0,.06)!important;border-color:rgba(0,0,0,.35)!important}\n.eco-tool__error{min-height:1.2em;font-weight:600;flex:1 1 240px}\n.eco-tool__result{margin-top:16px}\n.eco-tool__subtitle{margin:0 0 10px}\n.eco-tool__cards{display:grid;gap:10px;grid-template-columns:1fr}\n@media (min-width:860px){.eco-tool__cards{grid-template-columns:1fr 1fr}}\n.eco-tool__card{border:1px solid rgba(0,0,0,.12);border-radius:12px;padding:12px}\n.eco-tool__card--wide{margin-top:10px}\n.eco-tool__metric-label{opacity:.85;font-weight:600}\n.eco-tool__metric-value{font-size:1.6em;font-weight:800;margin-top:6px;line-height:1.1}\n.eco-tool__metric-sub{opacity:.85;margin-top:6px}\n.eco-tool__bars{display:grid;gap:10px;margin-top:12px}\n.eco-tool__barrow{display:grid;grid-template-columns:150px 1fr 100px;gap:10px;align-items:center}\n@media (max-width:480px){.eco-tool__barrow{grid-template-columns:110px 1fr 75px}}\n.eco-tool__barlabel{font-weight:600;opacity:.9}\n.eco-tool__bartrack{border:1px solid rgba(0,0,0,.12);border-radius:999px;height:12px;overflow:hidden;background:rgba(0,0,0,.03)}\n.eco-tool__barfill{height:100%;width:0%;background:rgba(0,0,0,.25)}\n.eco-tool__barval{text-align:right;opacity:.85;white-space:nowrap}\n.eco-tool__note{margin:10px 0 0;opacity:.9}\n.eco-tool__muted{opacity:.8}\n.eco-tool__details{margin-top:14px}\n.eco-tool__summary{cursor:pointer;font-weight:700}\n.eco-tool__details-body{margin-top:10px}\n.eco-tool__text{margin:0 0 10px}\n.eco-tool__list{margin:0;padding-left:18px}\n<\/style>\n\n<script>\n(function(){\n  const S = \"4bd2e\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const oxygenEl = el(\"eco-suit-oxygen\");\n  const coolingEl = el(\"eco-suit-cooling\");\n  const batteryEl = el(\"eco-suit-battery\");\n  const exertionEl = el(\"eco-suit-exertion\");\n  const reserveEl = el(\"eco-suit-reserve\");\n  const viewEl = el(\"eco-suit-view\");\n\n  const calcBtn = el(\"eco-suit-calc\");\n  const resetBtn = el(\"eco-suit-reset\");\n  const errorEl = el(\"eco-suit-error\");\n  const resultEl = el(\"eco-suit-result\");\n\n  const mainEl = el(\"eco-suit-main\");\n  const mainSubEl = el(\"eco-suit-main-sub\");\n  const limitEl = el(\"eco-suit-limit\");\n  const limitSubEl = el(\"eco-suit-limit-sub\");\n  const barsEl = el(\"eco-suit-bars\");\n  const tipEl = el(\"eco-suit-tip\");\n  const factorsEl = el(\"eco-suit-factors\");\n\n  function setError(msg){ errorEl.textContent = msg || \"\"; }\n  function fmt(x){ return x.toLocaleString(undefined,{minimumFractionDigits:2,maximumFractionDigits:2}); }\n  function fillFactors(){\n    factorsEl.innerHTML = [\n      `<li><strong>Activity adjustment:<\/strong> oxygen and cooling are divided by activity factor<\/li>`,\n      `<li><strong>Reserve:<\/strong> adds 0.5 h if enabled<\/li>`,\n      `<li><strong>Overall limit:<\/strong> shortest adjusted system duration<\/li>`\n    ].join(\"\");\n  }\n  function barRow(label, pct, value){\n    const p = Math.max(0, Math.min(100, pct));\n    return `<div class=\"eco-tool__barrow\"><div class=\"eco-tool__barlabel\">${label}<\/div><div class=\"eco-tool__bartrack\"><div class=\"eco-tool__barfill\" style=\"width:${p}%\"><\/div><\/div><div class=\"eco-tool__barval\">${value}<\/div><\/div>`;\n  }\n\n  function calculate(){\n    setError(\"\");\n    const oxygen = Number(oxygenEl.value);\n    const cooling = Number(coolingEl.value);\n    const battery = Number(batteryEl.value);\n    const exertion = Number(exertionEl.value);\n    const reserve = reserveEl.value === \"yes\" ? 0.5 : 0;\n    const view = viewEl.value;\n\n    if (![oxygen,cooling,battery,exertion].every(v => Number.isFinite(v) && v > 0)){\n      setError(\"Please enter valid values.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    const oxygenAdj = (oxygen \/ exertion) + reserve;\n    const coolingAdj = (cooling \/ exertion) + reserve;\n    const batteryAdj = battery + reserve;\n\n    const systems = [\n      {label:\"Oxygen\", value:oxygenAdj},\n      {label:\"Cooling\", value:coolingAdj},\n      {label:\"Battery\", value:batteryAdj}\n    ].sort((a,b)=>a.value-b.value);\n\n    const limit = systems[0];\n\n    mainEl.textContent = view === \"limit\" ? limit.label : `${fmt(limit.value)} h`;\n    mainSubEl.textContent = view === \"limit\" ? `Primary system limit` : `Estimated maximum EVA time`;\n\n    limitEl.textContent = limit.label;\n    limitSubEl.textContent = `${fmt(limit.value)} h remaining in this simplified model`;\n\n    const max = Math.max(oxygenAdj, coolingAdj, batteryAdj, 1);\n    barsEl.innerHTML = [\n      barRow(\"Oxygen\", (oxygenAdj\/max)*100, `${fmt(oxygenAdj)} h`),\n      barRow(\"Cooling\", (coolingAdj\/max)*100, `${fmt(coolingAdj)} h`),\n      barRow(\"Battery\", (batteryAdj\/max)*100, `${fmt(batteryAdj)} h`)\n    ].join(\"\");\n\n    tipEl.textContent =\n      limit.label === \"Cooling\" ? \"Tip: Thermal control can become the limit during hard EVA work.\"\n      : limit.label === \"Oxygen\" ? \"Tip: Higher exertion usually cuts oxygen duration first.\"\n      : \"Tip: Power limits can end an EVA even if life-support consumables remain.\";\n\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    setError(\"\");\n    oxygenEl.value = \"8\";\n    coolingEl.value = \"6\";\n    batteryEl.value = \"7\";\n    exertionEl.value = \"1.0\";\n    reserveEl.value = \"yes\";\n    viewEl.value = \"time\";\n    resultEl.hidden = true;\n  }\n\n  fillFactors();\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Space Suit Survival Time Calculator Estimate how long life-support resources in a space suit could last based on oxygen, cooling, and battery limits. Oxygen supply(hours) Primary breathable oxygen duration. Cooling&hellip;<\/p>\n","protected":false},"author":2,"featured_media":0,"parent":2295,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"_sitemap_exclude":false,"_sitemap_priority":"","_sitemap_frequency":"","footnotes":""},"_links":{"self":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/3126"}],"collection":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=3126"}],"version-history":[{"count":1,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/3126\/revisions"}],"predecessor-version":[{"id":3127,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/3126\/revisions\/3127"}],"up":[{"embeddable":true,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2295"}],"wp:attachment":[{"href":"https:\/\/science-x.net\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=3126"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}