{"id":5350,"date":"2026-11-06T00:35:41","date_gmt":"2026-11-06T08:35:41","guid":{"rendered":"https:\/\/www.26yc.com\/tools\/unit-converter\/"},"modified":"2026-11-06T00:35:41","modified_gmt":"2026-11-06T08:35:41","slug":"unit-converter","status":"publish","type":"page","link":"https:\/\/www.26yc.com\/ja\/tools\/unit-converter\/","title":{"rendered":"Engineering Unit Converter"},"content":{"rendered":"<p>Sizing an air-to-air heat exchanger means converting between SI and imperial specifications: airflow in m3\/h or CFM, duty in kW or BTU\/h, pressure drop in Pa or inWC, and face area in m2 or ft2. This converter handles all five live as you type, so a European datasheet and a US fan curve can be compared directly. All calculation runs in your browser; no data is uploaded.<\/p>\n<style>\r\n.yc-tp-unit-converter{font-family:-apple-system,Segoe UI,Roboto,Helvetica,Arial,sans-serif;color:#222;line-height:1.6;--ink:#1a3c5e;--accent:#0f6e56;--bg:#f5f8fa;--card:#fff;--line:#dce4ea;--muted:#5f6b75}\r\n.yc-tp-unit-converter h1{color:var(--ink);font-size:26px;margin:8px 0 6px}\r\n.yc-tp-unit-converter .lead{color:var(--muted);margin:0 0 22px}\r\n.yc-tp-unit-converter .grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}\r\n@media(max-width:620px){.yc-tp-unit-converter .grid{grid-template-columns:1fr}}\r\n.yc-tp-unit-converter .card{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px}\r\n.yc-tp-unit-converter .card h2{font-size:15px;margin:0 0 12px;color:var(--accent);text-transform:uppercase;letter-spacing:.04em}\r\n.yc-tp-unit-converter .row{display:flex;align-items:center;gap:8px;margin:8px 0}\r\n.yc-tp-unit-converter .row label{flex:0 0 92px;font-size:13px;color:var(--muted)}\r\n.yc-tp-unit-converter .row input{flex:1;min-width:0;padding:9px 10px;border:1px solid var(--line);border-radius:8px;font-size:15px;font-variant-numeric:tabular-nums}\r\n.yc-tp-unit-converter .row input:focus{outline:2px solid var(--accent);border-color:var(--accent)}\r\n.yc-tp-unit-converter .row .u{flex:0 0 54px;font-size:12px;color:var(--muted);text-align:right}\r\n.yc-tp-unit-converter .note{font-size:12px;color:var(--muted);margin-top:6px}\r\n.yc-tp-unit-converter .cta{margin-top:30px;background:#eaf3ef;border:1px solid #bfe0d2;border-radius:12px;padding:18px}\r\n.yc-tp-unit-converter .cta h2{margin:0 0 8px;color:var(--ink);font-size:18px}\r\n.yc-tp-unit-converter .cta a.btn{display:inline-block;background:var(--accent);color:#fff;text-decoration:none;padding:10px 16px;border-radius:8px;font-weight:500;margin-top:8px}\r\n.yc-tp-unit-converter .cta .phone{font-weight:600;color:var(--ink)}\r\n.yc-tp-unit-converter .links{margin-top:14px;font-size:13px;color:var(--muted)}\r\n.yc-tp-unit-converter .links a{color:var(--accent);text-decoration:none}\r\n<\/style>\r\n<div class=\"yc-tp yc-tp-unit-converter\">\r\n\r\n  \r\n  <p class=\"lead\">For air-to-air heat exchangers, HVAC and ventilation work &mdash; convert airflow, power, temperature, pressure and area between SI and imperial, live as you type.<\/p>\r\n\r\n  <div class=\"grid\">\r\n    <div class=\"card\">\r\n      <h2>\u98a8\u91cf<\/h2>\r\n      <div class=\"row\"><label>m&sup3;\/h<\/label><input id=\"af_m3\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">m&sup3;\/h<\/span><\/div>\r\n      <div class=\"row\"><label>CFM<\/label><input id=\"af_cfm\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">ft&sup3;\/min<\/span><\/div>\r\n      <div class=\"note\">1 CFM = 1.699 m&sup3;\/h<\/div>\r\n    <\/div>\r\n\r\n    <div class=\"card\">\r\n      <h2>\u52d5\u529b<\/h2>\r\n      <div class=\"row\"><label>kW<\/label><input id=\"pw_kw\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">kW<\/span><\/div>\r\n      <div class=\"row\"><label>BTU\/h<\/label><input id=\"pw_btu\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">BTU\/h<\/span><\/div>\r\n      <div class=\"row\"><label>kcal\/h<\/label><input id=\"pw_kcal\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">kcal\/h<\/span><\/div>\r\n      <div class=\"note\">1 kW = 3412.14 BTU\/h = 860.42 kcal\/h<\/div>\r\n    <\/div>\r\n\r\n    <div class=\"card\">\r\n      <h2>Temperature<\/h2>\r\n      <div class=\"row\"><label>&deg;C<\/label><input id=\"tp_c\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">&deg;C<\/span><\/div>\r\n      <div class=\"row\"><label>&deg;F<\/label><input id=\"tp_f\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">&deg;F<\/span><\/div>\r\n      <div class=\"note\">F = C &times; 9\/5 + 32<\/div>\r\n    <\/div>\r\n\r\n    <div class=\"card\">\r\n      <h2>Pressure<\/h2>\r\n      <div class=\"row\"><label>Pa<\/label><input id=\"pr_pa\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">Pa<\/span><\/div>\r\n      <div class=\"row\"><label>inWC<\/label><input id=\"pr_iw\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">inWC<\/span><\/div>\r\n      <div class=\"row\"><label>mmH&sub2;O<\/label><input id=\"pr_mm\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">mmH&sub2;O<\/span><\/div>\r\n      <div class=\"note\">1 inWC = 249.09 Pa = 25.4 mmH&sub2;O<\/div>\r\n    <\/div>\r\n\r\n    <div class=\"card\" style=\"grid-column:1 \/ -1\">\r\n      <h2>\u5206\u91ce<\/h2>\r\n      <div class=\"row\"><label>m&sup2;<\/label><input id=\"ar_m2\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">m&sup2;<\/span><\/div>\r\n      <div class=\"row\"><label>ft&sup2;<\/label><input id=\"ar_ft2\" type=\"number\" inputmode=\"decimal\" placeholder=\"0\"><span class=\"u\">ft&sup2;<\/span><\/div>\r\n      <div class=\"note\">1 m&sup2; = 10.764 ft&sup2;<\/div>\r\n    <\/div>\r\n  <\/div>\r\n\r\n  <section class=\"cta\">\r\n    <h2>Specifying a heat exchanger?<\/h2>\r\n    <p>Pair these conversions with our product pages to size the right unit, or talk to our engineers about your project.<\/p>\r\n    <p class=\"phone\">Call: 15753355505<\/p>\r\n    <a class=\"btn\" href=\"https:\/\/www.26yc.com\/ja\/contact-us\/\">Request a quote &rarr;<\/a>\r\n    <div class=\"links\">\r\n      Products:\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/products\/air-to-air-heat-exchanger\/\">Air-to-Air<\/a> &\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/products\/plate-heat-exchanger\/\">Plate<\/a> &\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/products\/rotary-heat-wheel\/\">Rotary Wheel<\/a> &\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/products\/heat-pipe-heat-exchanger\/\">\u30d2\u30fc\u30c8\u30d1\u30a4\u30d7<\/a> |\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/industrial\/heat-exchanger\/\">Heat Exchanger Guide<\/a><br>\r\n      Tools:\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/tools\/selection-guide\/\">Type comparison<\/a> &middot;\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/tools\/application-wizard\/\">Application selector<\/a> &middot;\r\n      <a href=\"https:\/\/www.26yc.com\/ja\/tools\/standards-glossary\/\">Standards &amp; glossary<\/a>\r\n    <\/div>\r\n  <\/section>\r\n\r\n<\/div>\r\n<script>\r\n\r\nfunction bind(a,b,fn){const x=document.getElementById(a),y=document.getElementById(b);\r\n  x.addEventListener('input',()=>{y.value=x.value===''?'':round(fn(parseFloat(x.value)))});\r\n  y.addEventListener('input',()=>{x.value=y.value===''?'':round(fn(parseFloat(y.value),true))});}\r\nfunction round(v){if(!isFinite(v))return'';return (Math.round(v*1e4)\/1e4).toString();}\r\n\r\n\/\/ airflow\r\nbind('af_m3','af_cfm',v=>v*0.5886);          \/\/ m3\/h -> CFM  (CFM = m3\/h \/ 1.699)\r\nbind('af_cfm','af_m3',v=>v*1.699);            \/\/ CFM -> m3\/h\r\n\/\/ power kW <-> BTU\/h\r\nbind('pw_kw','pw_btu',v=>v*3412.14);\r\nbind('pw_btu','pw_kw',v=>v\/3412.14);\r\n\/\/ power kW <-> kcal\/h\r\nbind('pw_kw','pw_kcal',v=>v*860.42);\r\nbind('pw_kcal','pw_kw',v=>v\/860.42);\r\n\/\/ temperature\r\nbind('tp_c','tp_f',v=>v*9\/5+32);\r\nbind('tp_f','tp_c',v=>(v-32)*5\/9);\r\n\/\/ pressure Pa <-> inWC\r\nbind('pr_pa','pr_iw',v=>v\/249.09);\r\nbind('pr_iw','pr_pa',v=>v*249.09);\r\n\/\/ pressure Pa <-> mmH2O\r\nbind('pr_pa','pr_mm',v=>v\/9.80665);\r\nbind('pr_mm','pr_pa',v=>v*9.80665);\r\n\/\/ area\r\nbind('ar_m2','ar_ft2',v=>v*10.764);\r\nbind('ar_ft2','ar_m2',v=>v\/10.764);\r\n\r\n<\/script>\n<h2>How to use this tool in a specification<\/h2>\n<p>These results are a first-pass screening aid. Confirm the duty point against certified test data (EN 308 \/ AHRI 1060), the applicable energy code, and the manufacturer datasheet before issuing a purchase specification. For a verified sizing, <a href=\"\/ja\/contact-us\/\">send us your airflow and temperatures<\/a>.<\/p>\n<h2>Frequently asked questions<\/h2>\n<h3>How do I convert m3\/h to CFM for airflow?<\/h3>\n<p>Multiply cubic meters per hour by 0.5886 to get cubic feet per minute (1 CFM = 1.699 m3\/h). Our converter does this instantly as you type.<\/p>\n<h3>What is 1 kW in BTU\/h?<\/h3>\n<p>1 kilowatt equals 3412.14 BTU per hour. Enter a value in either box and the converter shows the equivalent in the other unit.<\/p>\n<h3>How do I convert Celsius to Fahrenheit?<\/h3>\n<p>F = C x 9\/5 + 32. For example 20 C is 68 F. The converter handles both directions automatically.<\/p>\n<h3>Why convert Pa to inWC for fans and filters?<\/h3>\n<p>Pressure drop across heat exchangers, filters and fans is quoted in Pascals (SI) or inches of water column (imperial). 1 inWC = 249.09 Pa. Converting keeps specs comparable across datasheets.<\/p>\n<h2>Continue reading<\/h2>\n<p>Related: <a href=\"\/ja\/tools\/selection-guide\/\">exchanger type comparison<\/a>, <a href=\"\/ja\/heat-exchanger-selection-guide\/\">\u9078\u5b9a\u30ac\u30a4\u30c9<\/a>, <a href=\"\/ja\/heat-exchanger-pressure-drop-explained\/\">pressure drop explained<\/a> &middot; <a href=\"\/ja\/tools\/\">all heat recovery tools<\/a>.<\/p>","protected":false},"excerpt":{"rendered":"<p>Sizing an air-to-air heat exchanger means converting between SI and imperial specifications: airflow in m3\/h or CFM, duty in kW or BTU\/h, pressure drop in Pa or inWC, and face area in m2 or ft2. This converter handles all five live as you type, so a European datasheet and a US fan curve can be [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"parent":5323,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"","meta":{"footnotes":""},"class_list":["post-5350","page","type-page","status-publish","hentry"],"_links":{"self":[{"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/pages\/5350","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/types\/page"}],"replies":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/comments?post=5350"}],"version-history":[{"count":0,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/pages\/5350\/revisions"}],"up":[{"embeddable":true,"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/pages\/5323"}],"wp:attachment":[{"href":"https:\/\/www.26yc.com\/ja\/wp-json\/wp\/v2\/media?parent=5350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}