{"id":2234,"date":"2026-01-30T22:28:23","date_gmt":"2026-01-30T20:28:23","guid":{"rendered":"https:\/\/science-x.net\/?page_id=2234"},"modified":"2026-01-30T22:38:38","modified_gmt":"2026-01-30T20:38:38","slug":"weight-on-other-planets-calculator","status":"publish","type":"page","link":"https:\/\/science-x.net\/?page_id=2234","title":{"rendered":"Weight on Other Planets Calculator"},"content":{"rendered":"\n<div class=\"eco-tool wp-block-group\" id=\"eco-tool-space-wt-2c9f1\">\n  <div class=\"eco-tool__header\">\n    <h2 class=\"eco-tool__title\">Weight on Other Planets Calculator<\/h2>\n    <p class=\"eco-tool__lead\">\n      Enter your Earth weight to see what you\u2019d weigh on the Moon and other planets. Results use surface gravity averages (approximate).\n    <\/p>\n  <\/div>\n\n  <form class=\"eco-tool__form\" id=\"eco-space-wt-form-2c9f1\" novalidate>\n    <div class=\"eco-tool__grid3\">\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-wt-earth-2c9f1\">Your weight on Earth<\/label>\n        <div class=\"eco-tool__row\">\n          <input class=\"eco-tool__input\" id=\"eco-wt-earth-2c9f1\" type=\"number\" min=\"1\" step=\"0.1\" value=\"70\" inputmode=\"decimal\" \/>\n          <select class=\"eco-tool__input eco-tool__unit\" id=\"eco-wt-unit-2c9f1\">\n            <option value=\"kg\" selected>kg<\/option>\n            <option value=\"lb\">lb<\/option>\n          <\/select>\n        <\/div>\n        <div class=\"eco-tool__hint\">Tip: 70 kg \u2248 154 lb.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\" for=\"eco-wt-planet-2c9f1\">Focus planet<\/label>\n        <select class=\"eco-tool__input\" id=\"eco-wt-planet-2c9f1\">\n          <option value=\"moon\">Moon<\/option>\n          <option value=\"mercury\">Mercury<\/option>\n          <option value=\"venus\">Venus<\/option>\n          <option value=\"mars\" selected>Mars<\/option>\n          <option value=\"jupiter\">Jupiter<\/option>\n          <option value=\"saturn\">Saturn<\/option>\n          <option value=\"uranus\">Uranus<\/option>\n          <option value=\"neptune\">Neptune<\/option>\n          <option value=\"pluto\">Pluto<\/option>\n        <\/select>\n        <div class=\"eco-tool__hint\">We\u2019ll highlight this one.<\/div>\n      <\/div>\n\n      <div class=\"eco-tool__field\">\n        <label class=\"eco-tool__label\">What this means<\/label>\n        <div class=\"eco-tool__noteBox\">\n          Your <strong>mass<\/strong> stays the same. Your <strong>weight<\/strong> changes because gravity is different.\n        <\/div>\n        <div class=\"eco-tool__hint\">Weight \u221d surface gravity.<\/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-wt-calc-2c9f1\">Calculate<\/button>\n      <button type=\"button\" class=\"wp-element-button eco-tool__btn eco-tool__btn--ghost\" id=\"eco-wt-reset-2c9f1\">Reset<\/button>\n      <div class=\"eco-tool__error\" id=\"eco-wt-error-2c9f1\" aria-live=\"polite\"><\/div>\n    <\/div>\n  <\/form>\n\n  <div class=\"eco-tool__result\" id=\"eco-wt-result-2c9f1\" hidden>\n    <h3 class=\"eco-tool__subtitle\">Your weight across the Solar System<\/h3>\n\n    <div class=\"eco-tool__cardsGrid\" id=\"eco-wt-cards-2c9f1\"><\/div>\n\n    <p class=\"eco-tool__note\">\n      Values are approximate and use typical surface gravity ratios compared with Earth.\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 multiply your Earth weight by each world\u2019s surface gravity ratio (relative to Earth = 1.00).\n      <\/p>\n      <ul class=\"eco-tool__list\" id=\"eco-wt-factors-2c9f1\"><\/ul>\n    <\/div>\n  <\/details>\n<\/div>\n\n<style>\n\/* Scoped styles only within .eco-tool *\/\n.eco-tool{\n  border: 1px solid rgba(0,0,0,.12);\n  border-radius: 12px;\n  padding: 16px;\n}\n\n.eco-tool__header{ margin-bottom: 12px; }\n.eco-tool__title{ margin: 0 0 8px; }\n.eco-tool__lead{ margin: 0; opacity: .9; }\n\n.eco-tool__form{ margin-top: 12px; }\n\n\/* Symmetric 3-col layout *\/\n.eco-tool__grid3{\n  display: grid;\n  grid-template-columns: 1fr;\n  gap: 16px;\n}\n@media (min-width: 860px){\n  .eco-tool__grid3{ grid-template-columns: 1fr 1fr 1fr; }\n}\n\n.eco-tool__field{\n  display: flex;\n  flex-direction: column;\n  gap: 6px;\n}\n\n.eco-tool__label{ font-weight: 600; }\n\n.eco-tool__input{\n  width: 100%;\n  height: 44px;\n  padding: 0 12px;\n  border: 1px solid rgba(0,0,0,.20);\n  border-radius: 10px;\n  background: #fff;\n  box-sizing: border-box;\n  font: inherit;\n}\n\n\/* Select arrow + alignment *\/\n.eco-tool select.eco-tool__input{\n  appearance: none;\n  -webkit-appearance: none;\n  line-height: 44px;\n  padding-right: 40px;\n  background-image:\n    linear-gradient(45deg, transparent 50%, rgba(0,0,0,.60) 50%),\n    linear-gradient(135deg, rgba(0,0,0,.60) 50%, transparent 50%);\n  background-position:\n    calc(100% - 18px) 50%,\n    calc(100% - 12px) 50%;\n  background-size: 6px 6px;\n  background-repeat: no-repeat;\n}\n\n.eco-tool__row{\n  display: grid;\n  grid-template-columns: 1fr 90px;\n  gap: 10px;\n}\n.eco-tool__unit{ min-width: 90px; }\n\n\/* Keep symmetry *\/\n.eco-tool__hint{\n  font-size: .92em;\n  opacity: .78;\n  min-height: 38px;\n}\n\n.eco-tool__actions{\n  display: flex;\n  flex-wrap: wrap;\n  gap: 10px;\n  align-items: center;\n  margin-top: 16px;\n}\n.eco-tool__btn{ padding: 10px 22px; }\n.eco-tool__btn--ghost{\n  background: transparent !important;\n  border: 1px solid rgba(0,0,0,.20) !important;\n}\n.eco-tool__btn--ghost:hover,\n.eco-tool__btn--ghost:focus{\n  background: rgba(0,0,0,.06) !important;\n  border-color: rgba(0,0,0,.35) !important;\n}\n\n.eco-tool__error{\n  min-height: 1.2em;\n  font-weight: 600;\n  flex: 1 1 240px;\n}\n\n\/* Note box *\/\n.eco-tool__noteBox{\n  border: 1px solid rgba(0,0,0,.12);\n  border-radius: 12px;\n  padding: 12px;\n  background: rgba(0,0,0,.02);\n  min-height: 44px;\n}\n\n\/* Results *\/\n.eco-tool__result{ margin-top: 16px; }\n.eco-tool__subtitle{ margin: 0 0 10px; }\n\n.eco-tool__cardsGrid{\n  display: grid;\n  grid-template-columns: 1fr;\n  gap: 10px;\n}\n@media (min-width: 860px){\n  .eco-tool__cardsGrid{ grid-template-columns: 1fr 1fr 1fr; }\n}\n\n.eco-tool__card{\n  border: 1px solid rgba(0,0,0,.12);\n  border-radius: 12px;\n  padding: 12px;\n}\n\n.eco-tool__cardTop{\n  display: flex;\n  align-items: baseline;\n  justify-content: space-between;\n  gap: 10px;\n}\n\n.eco-tool__planet{ font-weight: 800; }\n.eco-tool__ratio{ opacity: .8; font-weight: 600; }\n\n.eco-tool__value{\n  font-size: 1.55em;\n  font-weight: 900;\n  margin-top: 8px;\n  line-height: 1.1;\n}\n\n.eco-tool__sub{ opacity: .85; margin-top: 4px; }\n\n.eco-tool__card--highlight{\n  border-color: rgba(0,0,0,.28);\n  box-shadow: 0 6px 18px rgba(0,0,0,.08);\n}\n\n.eco-tool__note{ margin: 10px 0 0; opacity: .9; }\n\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 = \"2c9f1\";\n  const el = (id) => document.getElementById(id + \"-\" + S);\n\n  const earthEl = el(\"eco-wt-earth\");\n  const unitEl = el(\"eco-wt-unit\");\n  const focusEl = el(\"eco-wt-planet\");\n\n  const calcBtn = el(\"eco-wt-calc\");\n  const resetBtn = el(\"eco-wt-reset\");\n  const errorEl = el(\"eco-wt-error\");\n\n  const resultEl = el(\"eco-wt-result\");\n  const cardsEl = el(\"eco-wt-cards\");\n  const factorsEl = el(\"eco-wt-factors\");\n\n  \/\/ Surface gravity ratios relative to Earth (Earth = 1.00), approximate\n  const WORLDS = [\n    { key:\"moon\",    name:\"Moon\",    ratio:0.165 },\n    { key:\"mercury\", name:\"Mercury\", ratio:0.38  },\n    { key:\"venus\",   name:\"Venus\",   ratio:0.90  },\n    { key:\"mars\",    name:\"Mars\",    ratio:0.38  },\n    { key:\"jupiter\", name:\"Jupiter\", ratio:2.53  },\n    { key:\"saturn\",  name:\"Saturn\",  ratio:1.06  },\n    { key:\"uranus\",  name:\"Uranus\",  ratio:0.89  },\n    { key:\"neptune\", name:\"Neptune\", ratio:1.14  },\n    { key:\"pluto\",   name:\"Pluto\",   ratio:0.06  }\n  ];\n\n  function setError(msg){ errorEl.textContent = msg || \"\"; }\n\n  function lbToKg(lb){ return lb * 0.45359237; }\n  function kgToLb(kg){ return kg \/ 0.45359237; }\n\n  function fmt(x){\n    \/\/ 1 decimal, but avoid trailing .0 for big numbers? keep consistent\n    return (Math.round(x * 10) \/ 10).toLocaleString(undefined, { minimumFractionDigits: 1, maximumFractionDigits: 1 });\n  }\n\n  function fillFactors(){\n    factorsEl.innerHTML = WORLDS\n      .map(w => `<li><strong>${w.name}:<\/strong> gravity ratio \u2248 ${w.ratio.toFixed(3)} \u00d7 Earth<\/li>`)\n      .join(\"\");\n  }\n\n  function calculate(){\n    setError(\"\");\n\n    const earthVal = Number(earthEl.value);\n    if (!Number.isFinite(earthVal) || earthVal <= 0){\n      setError(\"Please enter a valid Earth weight.\");\n      resultEl.hidden = true;\n      return;\n    }\n\n    const unit = unitEl.value; \/\/ kg or lb\n    const earthKg = unit === \"kg\" ? earthVal : lbToKg(earthVal);\n\n    const focus = focusEl.value;\n\n    const cards = WORLDS.map(w => {\n      const wKg = earthKg * w.ratio;\n      const out = (unit === \"kg\") ? wKg : kgToLb(wKg);\n      const unitLabel = (unit === \"kg\") ? \"kg\" : \"lb\";\n\n      const cls = \"eco-tool__card\" + (w.key === focus ? \" eco-tool__card--highlight\" : \"\");\n      return `\n        <div class=\"${cls}\">\n          <div class=\"eco-tool__cardTop\">\n            <div class=\"eco-tool__planet\">${w.name}<\/div>\n            <div class=\"eco-tool__ratio\">\u00d7 ${w.ratio.toFixed(3)}<\/div>\n          <\/div>\n          <div class=\"eco-tool__value\">${fmt(out)} ${unitLabel}<\/div>\n          <div class=\"eco-tool__sub\">Relative to your Earth weight<\/div>\n        <\/div>\n      `;\n    }).join(\"\");\n\n    cardsEl.innerHTML = cards;\n    resultEl.hidden = false;\n  }\n\n  function reset(){\n    setError(\"\");\n    earthEl.value = \"70\";\n    unitEl.value = \"kg\";\n    focusEl.value = \"mars\";\n    resultEl.hidden = true;\n  }\n\n  \/\/ init\n  fillFactors();\n  calcBtn.addEventListener(\"click\", calculate);\n  resetBtn.addEventListener(\"click\", reset);\n})();\n<\/script>\n","protected":false},"excerpt":{"rendered":"<p>Weight on Other Planets Calculator Enter your Earth weight to see what you\u2019d weigh on the Moon and other planets. Results use surface gravity averages (approximate). Your weight on Earth&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\/2234"}],"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=2234"}],"version-history":[{"count":3,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2234\/revisions"}],"predecessor-version":[{"id":2237,"href":"https:\/\/science-x.net\/index.php?rest_route=\/wp\/v2\/pages\/2234\/revisions\/2237"}],"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=2234"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}