Kalkulatè pouvwa
Calculer motè pouvwa soti nan torque ak RPM, oswa estime quart-mile trap vitesse.
Rezilta yo mete ajou pandan w ap ekri.
Atik sa a
Horsepower measures the rate of doing work, and this horsepower calculator finds it two ways. In the first mode, engine power follows directly from torque and rotational speed: HP = torque (lb-ft) × RPM ÷ 5252. The magic number 5,252 comes from the definition of horsepower (33,000 ft-lb per minute) and the 2π radians in a revolution, and it is also the RPM at which the horsepower and torque curves always intersect on a dyno chart. The tool reports the metric equivalent too, using 1 hp = 0.7457 kW.
As a worked example, an engine making 300 lb-ft of torque at 5,000 RPM produces 300 × 5000 ÷ 5252 ≈ 286 hp, which is about 213 kW. Because power is torque times speed, the same 300 lb-ft makes far more horsepower at high RPM than at low — which is why high-revving engines chase big peak-power figures even with modest torque.
Switch to the quarter-mile mode to estimate drag-strip performance from power and vehicle weight using Roger Huntington’s classic empirical formulas: trap speed ≈ 234 × (hp / weight)^⅓ mph and elapsed time ≈ 5.825 × (weight / hp)^⅓ seconds. A 300 hp car weighing 3,500 lb comes out around 103 mph and a 13.2-second quarter mile. These are rough guides that ignore traction, aerodynamics and driver skill, but they are a quick sanity check for a build or a way to back out power from a known trap speed.
Kesyon ki poze souvan
Poukisa 5252 nan fòmil la?
Konbinezon de konstan yo bay HP = tansyon × RPM ÷ 5252, ki se tou poukisa tansyon ak tansyon kouryèll yo toujou intersect nan 5252 RPM sou yon dyno tablo.
Ki jan ou estime pouvwa a nan yon kwadwilatè?
Formule Roger Huntington a konekte vitès trap ak pwa a pouvwa: vitès trap ≈ 234 × (hp / pwa) ^ ⅓ mph. Kalkulatè a inverts li pou estime vitès trap ak tan pase soti nan pouvwa ou ak pwa, yon gid amann ki neglije traction ak aerodynamics.
Ki kantite watt se yon pouvwa?
Yon mekanis horsepower se sou 745.7 wat, se konsa 300 hp se sou 224 kW. Kalkulatè a montre kilowatt ekwivalent ansanm ak horsepower.
Poukisa menm tou de tou de bay diferan pouvwa nan RPM diferan?
HP = tork × RPM ÷ 5252, se konsa 300 lb-ft fè sou 286 hp nan 5,000 RPM men sèlman 143 hp nan 2,500 RPM - rezon ki fè motè yo revved pou rive nan pouvwa maksimòm.
Ki sa ki se yon bon pouvwa-a-poids pou yon quart mil vit?
Trap vitès skale ak ranje kub la nan horsepower pou chak liv, se konsa pwa a enpòtan kòm anpil tankou pouvwa a. Alantou 0.1 hp pou chak liv (yon 350 hp, 3,500 lb machin) mete ou nan alantou 110 mph traps; pèdi pwa ede jis tankou anpil tankou ajoute pouvwa.
Èske m ka estime pouvwa a soti nan vitès trap mwen an?
Modèl quart-mile kouri fòmil Huntington a soti nan pouvwa ak pwa a yon vitès trap ak ET. Pou ale lòt fason, ajiste enpòte a horsepower jiskaske vitès trap prevwa matche ak ou mezire yon - ke horsepower se estimasyon an apwòch.
Ki sa ki se yon estimasyon egzat?
Formules Huntington a pa pran an kont traction, aerodynamics, gearing, lansman teknik ak pèt driveline, se konsa yon machin reyèl ka gen plizyè dèt nan yon dezyèm off. Trete yo kòm yon gid, pa yon ranplasman pou yon kouri tan.
API — itilize sa a calculateur soti nan kòd
Apèl sa a calculateur kòm yon gratis JSON pwent-de-fini - pa gen okenn kle ki nesesè. Envoye valè jaden anba a kòm paramèt kesyonè oswa JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Li dokiman API a an antye →
Endpoint
GET https://calculator.free/api/v1/horsepower/curl
curl "https://calculator.free/api/v1/horsepower/?torque=300&rpm=5000&hp=300&weight=3500&_mode=power"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/horsepower/?" + new URLSearchParams({
"torque": "300",
"rpm": "5000",
"hp": "300",
"weight": "3500",
"_mode": "power"
}));
const data = await r.json();
console.log(data.results);Rezilta yo se estimasyon pou kòmandman jeneral sèlman, pa finansye, medikal oswa konsèy taks.