Automotive Calculators<\/title>\n <style>\n body {\n font-family: sans-serif;\n background: #fff;\n color: #000;\n padding: 20px;\n }\n h1 {\n color: #003366;\n border-bottom: 2px solid #003366;\n padding-bottom: 5px;\n }\n h2 {\n color: #0055aa;\n margin-top: 30px;\n }\n input, select {\n margin: 5px;\n padding: 5px;\n width: 120px;\n border: 1px solid #ccc;\n border-radius: 4px;\n }\n button {\n margin: 10px;\n padding: 6px 12px;\n background-color: #0055aa;\n color: #fff;\n border: none;\n border-radius: 4px;\n cursor: pointer;\n }\n button:hover {\n background-color: #003366;\n }\n .calc {\n margin-bottom: 30px;\n border-bottom: 1px solid #ccc;\n padding-bottom: 20px;\n }\n label {\n display: inline-block;\n width: 220px;\n }\n .result {\n margin-top: 10px;\n color: #aa0000;\n font-weight: bold;\n }\n <\/style>\n\n<\/head>\n<body>\n <h1> Automotive Calculators<\/h1>\n\n <div class=\"calc\">\n <h2>Engine Displacement<\/h2>\n <label>Bore (Inches): <input id=\"bore\" type=\"number\"><\/label>\n <label>Stroke (Inches): <input id=\"stroke\" type=\"number\"><\/label>\n <label>Cylinders: <input id=\"cylinders\" type=\"number\"><\/label>\n <button onclick=\"calcDisplacement()\">Calculate<\/button>\n <div class=\"result\" id=\"dispResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Compression Ratio<\/h2>\n <label>Combustion Chamber Volume (cc): <input id=\"chamber\" type=\"number\"><\/label>\n <label>Clearance Volume (cc): <input id=\"clearance\" type=\"number\"><\/label>\n <button onclick=\"calcCompression()\">Calculate<\/button>\n <div class=\"result\" id=\"compResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Gear Ratio & Speed<\/h2>\n <label>RPM: <input id=\"rpm\" type=\"number\"><\/label>\n <label>Gear Ratio: <input id=\"gearRatio\" type=\"number\"><\/label>\n <label>Final Drive Ratio: <input id=\"finalDrive\" type=\"number\"><\/label>\n <label>Tire Diameter (in): <input id=\"tireDia\" type=\"number\"><\/label>\n <button onclick=\"calcSpeed()\">Calculate<\/button>\n <div class=\"result\" id=\"speedResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Tire Size Converter<\/h2>\n <label>Width (mm): <input id=\"tireWidth\" type=\"number\"><\/label>\n <label>Aspect Ratio (%): <input id=\"aspectRatio\" type=\"number\"><\/label>\n <label>Rim Diameter (in): <input id=\"rimDia\" type=\"number\"><\/label>\n <button onclick=\"calcTireSize()\">Convert<\/button>\n <div class=\"result\" id=\"tireResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Fuel Consumption<\/h2>\n <label>MPG: <input id=\"mpg\" type=\"number\"><\/label>\n <button onclick=\"calcFuel()\">Convert<\/button>\n <div class=\"result\" id=\"fuelResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Injector Size<\/h2>\n <label>Horsepower: <input id=\"injHP\" type=\"number\"><\/label>\n <label>Fuel Pressure (psi): <input id=\"injPSI\" type=\"number\"><\/label>\n <button onclick=\"calcInjector()\">Calculate<\/button>\n <div class=\"result\" id=\"injResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Horsepower ↔ Torque<\/h2>\n <label>RPM: <input id=\"rpmHT\" type=\"number\"><\/label>\n <label>Horsepower: <input id=\"hpHT\" type=\"number\"><\/label>\n <button onclick=\"calcTorque()\">Calculate Torque<\/button>\n <label>Torque (lb-ft): <input id=\"torqueHT\" type=\"number\"><\/label>\n <button onclick=\"calcHP()\">Calculate HP<\/button>\n <div class=\"result\" id=\"htResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>\u00bc Mile Trap Speed<\/h2>\n <label>Vehicle Weight (lbs): <input id=\"trapWeight\" type=\"number\"><\/label>\n <label>Horsepower: <input id=\"trapHP\" type=\"number\"><\/label>\n <button onclick=\"calcTrap()\">Estimate<\/button>\n <div class=\"result\" id=\"trapResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>BSFC Fuel Flow<\/h2>\n <label>Horsepower: <input id=\"bsfcHP\" type=\"number\"><\/label>\n <label>BSFC (lb\/hp\/hr): <input id=\"bsfcVal\" type=\"number\" value=\"0.5\"><\/label>\n <button onclick=\"calcBSFC()\">Calculate<\/button>\n <div class=\"result\" id=\"bsfcResult\"><\/div>\n <\/div>\n\n <script>\n function calcDisplacement() {\n const bore = parseFloat(document.getElementById('bore').value); \/\/ in inches\n const stroke = parseFloat(document.getElementById('stroke').value); \/\/ in inches\n const cyl = parseInt(document.getElementById('cylinders').value); \/\/ count\n\n if (bore > 0 && stroke > 0 && cyl > 0) {\n const disp = (Math.PI \/ 4) * Math.pow(bore, 2) * stroke * cyl;\n document.getElementById('dispResult').textContent = `Displacement: ${disp.toFixed(2)} Cubicc Inches`;\n } else {\n document.getElementById('dispResult').textContent = `Please enter valid bore, stroke, and cylinder count`;\n }\n}\n\n function calcCompression() {\n const chamber = parseFloat(document.getElementById('chamber').value);\n const clearance = parseFloat(document.getElementById('clearance').value);\n const ratio = (chamber + clearance) \/ clearance;\n document.getElementById('compResult').textContent = `Compression Ratio: ${ratio.toFixed(2)}:1`;\n }\n\n function calcSpeed() {\n const rpm = parseFloat(document.getElementById('rpm').value);\n const gear = parseFloat(document.getElementById('gearRatio').value);\n const final = parseFloat(document.getElementById('finalDrive').value);\n const tire = parseFloat(document.getElementById('tireDia').value);\n const speed = (rpm * tire) \/ (gear * final * 336);\n document.getElementById('speedResult').textContent = `Speed: ${speed.toFixed(2)} mph`;\n }\n\n function calcTireSize() {\n const width = parseFloat(document.getElementById('tireWidth').value);\n const aspect = parseFloat(document.getElementById('aspectRatio').value);\n const rim = parseFloat(document.getElementById('rimDia').value);\n const sidewall = (width * (aspect \/ 100)) \/ 25.4;\n const diameter = (2 * sidewall) + rim;\n document.getElementById('tireResult').textContent = `Overall Diameter: ${diameter.toFixed(2)} in`;\n }\n\n function calcFuel() {\n const mpg = parseFloat(document.getElementById('mpg').value);\n const l100km = 235.214583 \/ mpg;\n document.getElementById('fuelResult').textContent = `Fuel Consumption: ${l100km.toFixed(2)} L\/100km`;\n }\n\n function calcInjector() {\n const hp = parseFloat(document.getElementById('injHP').value);\n const psi = parseFloat(document.getElementById('injPSI').value);\n const flow = hp * 0.5 \/ (psi \/ 43.5); \/\/ Approximate formula\n document.getElementById('injResult').textContent = `Required Injector Flow: ${flow.toFixed(2)} lb\/hr`;\n }\n\n function calcTorque() {\n const rpm = parseFloat(document.getElementById('rpmHT').value);\n const hp = parseFloat(document.getElementById('hpHT').value);\n\n if (rpm > 0) {\n const torque = (hp * 5252) \/ rpm;\n document.getElementById('htResult').textContent = `Torque: ${torque.toFixed(2)} lb-ft`;\n } else {\n document.getElementById('htResult').textContent = `RPM must be greater than zero`;\n }\n}\n\n function calcHP() {\n const rpm = parseFloat(document.getElementById('rpmHT').value);\n const torque = parseFloat(document.getElementById('torqueHT').value);\n const hp = (torque * rpm) \/ 5252;\n document.getElementById('htResult').textContent = `Horsepower: ${hp.toFixed(2)} HP`;\n }\n\n function calcTrap() {\n const weight = parseFloat(document.getElementById('trapWeight').value);\n const hp = parseFloat(document.getElementById('trapHP').value);\n const speed = Math.sqrt(hp \/ weight) * 234; \/\/ Approximate formula\n document.getElementById('trapResult').textContent = `Estimated Trap Speed: ${speed.toFixed(2)} mph`;\n }\n\n function calcBSFC() {\n const hp = parseFloat(document.getElementById('bsfcHP').value);\n const bsfc = parseFloat(document.getElementById('bsfcVal').value);\n const fuelFlow = hp * bsfc;\n document.getElementById('bsfcResult').textContent = `Fuel Flow: ${fuelFlow.toFixed(2)} lb\/hr`;\n }\n <\/script>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"<p>Automotive Calculators Automotive Calculators Engine Displacement Bore (Inches): Stroke (Inches): Cylinders: Calculate Compression Ratio Combustion Chamber Volume (cc): Clearance Volume (cc): Calculate Gear Ratio & Speed RPM: Gear Ratio: Final…<\/p>\n","protected":false},"author":1,"featured_media":2973,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wprm-recipe-roundup-name":"","wprm-recipe-roundup-description":"","footnotes":""},"categories":[21,106],"tags":[],"class_list":["post-2964","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming","category-software"],"yoast_head":"\r\n<title>Automotive Calculators - GaryHengeveld<\/title>\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:\/\/garyhengeveld.com\/wordpress\/automotive-calculators\/\" \/>\r\n<meta property=\"og:locale\" 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{"id":2964,"date":"2025-09-06T05:01:42","date_gmt":"2025-09-06T05:01:42","guid":{"rendered":"https:\/\/garyhengeveld.com\/wordpress\/?p=2964"},"modified":"2026-03-05T15:22:48","modified_gmt":"2026-03-05T15:22:48","slug":"automotive-calculators","status":"publish","type":"post","link":"https:\/\/garyhengeveld.com\/wordpress\/automotive-calculators\/","title":{"rendered":"Automotive Calculators"},"content":{"rendered":"\n\n\n\n \n Automotive Calculators<\/title>\n <style>\n body {\n font-family: sans-serif;\n background: #fff;\n color: #000;\n padding: 20px;\n }\n h1 {\n color: #003366;\n border-bottom: 2px solid #003366;\n padding-bottom: 5px;\n }\n h2 {\n color: #0055aa;\n margin-top: 30px;\n }\n input, select {\n margin: 5px;\n padding: 5px;\n width: 120px;\n border: 1px solid #ccc;\n border-radius: 4px;\n }\n button {\n margin: 10px;\n padding: 6px 12px;\n background-color: #0055aa;\n color: #fff;\n border: none;\n border-radius: 4px;\n cursor: pointer;\n }\n button:hover {\n background-color: #003366;\n }\n .calc {\n margin-bottom: 30px;\n border-bottom: 1px solid #ccc;\n padding-bottom: 20px;\n }\n label {\n display: inline-block;\n width: 220px;\n }\n .result {\n margin-top: 10px;\n color: #aa0000;\n font-weight: bold;\n }\n <\/style>\n\n<\/head>\n<body>\n <h1> Automotive Calculators<\/h1>\n\n <div class=\"calc\">\n <h2>Engine Displacement<\/h2>\n <label>Bore (Inches): <input id=\"bore\" type=\"number\"><\/label>\n <label>Stroke (Inches): <input id=\"stroke\" type=\"number\"><\/label>\n <label>Cylinders: <input id=\"cylinders\" type=\"number\"><\/label>\n <button onclick=\"calcDisplacement()\">Calculate<\/button>\n <div class=\"result\" id=\"dispResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Compression Ratio<\/h2>\n <label>Combustion Chamber Volume (cc): <input id=\"chamber\" type=\"number\"><\/label>\n <label>Clearance Volume (cc): <input id=\"clearance\" type=\"number\"><\/label>\n <button onclick=\"calcCompression()\">Calculate<\/button>\n <div class=\"result\" id=\"compResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Gear Ratio & Speed<\/h2>\n <label>RPM: <input id=\"rpm\" type=\"number\"><\/label>\n <label>Gear Ratio: <input id=\"gearRatio\" type=\"number\"><\/label>\n <label>Final Drive Ratio: <input id=\"finalDrive\" type=\"number\"><\/label>\n <label>Tire Diameter (in): <input id=\"tireDia\" type=\"number\"><\/label>\n <button onclick=\"calcSpeed()\">Calculate<\/button>\n <div class=\"result\" id=\"speedResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Tire Size Converter<\/h2>\n <label>Width (mm): <input id=\"tireWidth\" type=\"number\"><\/label>\n <label>Aspect Ratio (%): <input id=\"aspectRatio\" type=\"number\"><\/label>\n <label>Rim Diameter (in): <input id=\"rimDia\" type=\"number\"><\/label>\n <button onclick=\"calcTireSize()\">Convert<\/button>\n <div class=\"result\" id=\"tireResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Fuel Consumption<\/h2>\n <label>MPG: <input id=\"mpg\" type=\"number\"><\/label>\n <button onclick=\"calcFuel()\">Convert<\/button>\n <div class=\"result\" id=\"fuelResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Injector Size<\/h2>\n <label>Horsepower: <input id=\"injHP\" type=\"number\"><\/label>\n <label>Fuel Pressure (psi): <input id=\"injPSI\" type=\"number\"><\/label>\n <button onclick=\"calcInjector()\">Calculate<\/button>\n <div class=\"result\" id=\"injResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>Horsepower ↔ Torque<\/h2>\n <label>RPM: <input id=\"rpmHT\" type=\"number\"><\/label>\n <label>Horsepower: <input id=\"hpHT\" type=\"number\"><\/label>\n <button onclick=\"calcTorque()\">Calculate Torque<\/button>\n <label>Torque (lb-ft): <input id=\"torqueHT\" type=\"number\"><\/label>\n <button onclick=\"calcHP()\">Calculate HP<\/button>\n <div class=\"result\" id=\"htResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>\u00bc Mile Trap Speed<\/h2>\n <label>Vehicle Weight (lbs): <input id=\"trapWeight\" type=\"number\"><\/label>\n <label>Horsepower: <input id=\"trapHP\" type=\"number\"><\/label>\n <button onclick=\"calcTrap()\">Estimate<\/button>\n <div class=\"result\" id=\"trapResult\"><\/div>\n <\/div>\n\n <div class=\"calc\">\n <h2>BSFC Fuel Flow<\/h2>\n <label>Horsepower: <input id=\"bsfcHP\" type=\"number\"><\/label>\n <label>BSFC (lb\/hp\/hr): <input id=\"bsfcVal\" type=\"number\" value=\"0.5\"><\/label>\n <button onclick=\"calcBSFC()\">Calculate<\/button>\n <div class=\"result\" id=\"bsfcResult\"><\/div>\n <\/div>\n\n <script>\n function calcDisplacement() {\n const bore = parseFloat(document.getElementById('bore').value); \/\/ in inches\n const stroke = parseFloat(document.getElementById('stroke').value); \/\/ in inches\n const cyl = parseInt(document.getElementById('cylinders').value); \/\/ count\n\n if (bore > 0 && stroke > 0 && cyl > 0) {\n const disp = (Math.PI \/ 4) * Math.pow(bore, 2) * stroke * cyl;\n document.getElementById('dispResult').textContent = `Displacement: ${disp.toFixed(2)} Cubicc Inches`;\n } else {\n document.getElementById('dispResult').textContent = `Please enter valid bore, stroke, and cylinder count`;\n }\n}\n\n function calcCompression() {\n const chamber = parseFloat(document.getElementById('chamber').value);\n const clearance = parseFloat(document.getElementById('clearance').value);\n const ratio = (chamber + clearance) \/ clearance;\n document.getElementById('compResult').textContent = `Compression Ratio: ${ratio.toFixed(2)}:1`;\n }\n\n function calcSpeed() {\n const rpm = parseFloat(document.getElementById('rpm').value);\n const gear = parseFloat(document.getElementById('gearRatio').value);\n const final = parseFloat(document.getElementById('finalDrive').value);\n const tire = parseFloat(document.getElementById('tireDia').value);\n const speed = (rpm * tire) \/ (gear * final * 336);\n document.getElementById('speedResult').textContent = `Speed: ${speed.toFixed(2)} mph`;\n }\n\n function calcTireSize() {\n const width = parseFloat(document.getElementById('tireWidth').value);\n const aspect = parseFloat(document.getElementById('aspectRatio').value);\n const rim = parseFloat(document.getElementById('rimDia').value);\n const sidewall = (width * (aspect \/ 100)) \/ 25.4;\n const diameter = (2 * sidewall) + rim;\n document.getElementById('tireResult').textContent = `Overall Diameter: ${diameter.toFixed(2)} in`;\n }\n\n function calcFuel() {\n const mpg = parseFloat(document.getElementById('mpg').value);\n const l100km = 235.214583 \/ mpg;\n document.getElementById('fuelResult').textContent = `Fuel Consumption: ${l100km.toFixed(2)} L\/100km`;\n }\n\n function calcInjector() {\n const hp = parseFloat(document.getElementById('injHP').value);\n const psi = parseFloat(document.getElementById('injPSI').value);\n const flow = hp * 0.5 \/ (psi \/ 43.5); \/\/ Approximate formula\n document.getElementById('injResult').textContent = `Required Injector Flow: ${flow.toFixed(2)} lb\/hr`;\n }\n\n function calcTorque() {\n const rpm = parseFloat(document.getElementById('rpmHT').value);\n const hp = parseFloat(document.getElementById('hpHT').value);\n\n if (rpm > 0) {\n const torque = (hp * 5252) \/ rpm;\n document.getElementById('htResult').textContent = `Torque: ${torque.toFixed(2)} lb-ft`;\n } else {\n document.getElementById('htResult').textContent = `RPM must be greater than zero`;\n }\n}\n\n function calcHP() {\n const rpm = parseFloat(document.getElementById('rpmHT').value);\n const torque = parseFloat(document.getElementById('torqueHT').value);\n const hp = (torque * rpm) \/ 5252;\n document.getElementById('htResult').textContent = `Horsepower: ${hp.toFixed(2)} HP`;\n }\n\n function calcTrap() {\n const weight = parseFloat(document.getElementById('trapWeight').value);\n const hp = parseFloat(document.getElementById('trapHP').value);\n const speed = Math.sqrt(hp \/ weight) * 234; \/\/ Approximate formula\n document.getElementById('trapResult').textContent = `Estimated Trap Speed: ${speed.toFixed(2)} mph`;\n }\n\n function calcBSFC() {\n const hp = parseFloat(document.getElementById('bsfcHP').value);\n const bsfc = parseFloat(document.getElementById('bsfcVal').value);\n const fuelFlow = hp * bsfc;\n document.getElementById('bsfcResult').textContent = `Fuel Flow: ${fuelFlow.toFixed(2)} lb\/hr`;\n }\n <\/script>\n<\/body>\n<\/html>\n","protected":false},"excerpt":{"rendered":"<p>Automotive Calculators Automotive Calculators Engine Displacement Bore (Inches): Stroke (Inches): Cylinders: Calculate Compression Ratio Combustion Chamber Volume (cc): Clearance Volume (cc): Calculate Gear Ratio & Speed RPM: Gear Ratio: Final…<\/p>\n","protected":false},"author":1,"featured_media":2973,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"wprm-recipe-roundup-name":"","wprm-recipe-roundup-description":"","footnotes":""},"categories":[21,106],"tags":[],"class_list":["post-2964","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming","category-software"],"yoast_head":"\r\n<title>Automotive Calculators - GaryHengeveld<\/title>\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:\/\/garyhengeveld.com\/wordpress\/automotive-calculators\/\" \/>\r\n<meta property=\"og:locale\" content=\"en_US\" \/>\r\n<meta property=\"og:type\" content=\"article\" \/>\r\n<meta property=\"og:title\" content=\"Automotive Calculators - GaryHengeveld\" \/>\r\n<meta property=\"og:description\" content=\"Automotive Calculators 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