Horsepower Calculator
Calculate injini horsepower kubva torque uye RPM, kana kufungidzira quarter-mile trap speed.
Zvinyorwa zvinogadziridzwa paunenge uchinyora.
Nezve iyi kalkulator
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.
Zvimwe zvinobvunzwa zvakanyanya
Nei 5252 iri mu horsepower formula?
Horsepower inonzi 33,000 ft-lb paminuutti, ja yksi vallankumous pyyhkäisee 2π radiaaneja. Yakadaidza zvishoma nezvishoma zvinopa HP = torque × RPM ÷ 5252, joka on myös miksi hevosvoima ja torkkurivi aina yhdistyvät 5252 RPM:ssä dyno-kartalla.
Sei iwe uchifungidzira simba remoto kubva pakwadhi yemigwagwa?
Roger Huntington’s formula inobatanidza kusvikira kumhanya uye kuomarara kusimba: kusvikira kumhanya ≈ 234 × (hp/kuomarara) ^⅓ mph. Calculator inoshandura kuti ifungidzire kusvikira kumhanya uye nguva yapfuura kubva kune simba rako uye kuomarara, a rough guideline that ignores traction and aerodynamics.
Ndezvipi zviviri zvinodarika 1000 watts?
Mumwe mechanical horsepower ndeye 745.7 watts, saka 300 hp inopfuura 224 kW. Calculator inoratidza kilowatt ekuenzanisa pamwe ne horsepower.
Nei imwe chete torque ichipa akasiyana horsepower pakasiyana RPM?
HP = torque × RPM ÷ 5252, saka 300 lb-ft inoita nezve 286 hp pa 5,000 RPM asi chete 143 hp pa 2,500 RPM - chikonzero injini dziri revved kuti vawane simba peak.
Chii chinonzi chakanaka simba-ku-kurema ratio yenguva refu quarter mile?
Trap speed inosiyana nekubata rudzi rwe horsepower per pound, saka muviri unokosha sesimba. Pamusoro pe0.1 hp per pound (350 hp, 3,500 lb car) unowana muviri unosvika 110 mph traps; kubvisa muviri kunokubatsira sekunge wawedzera simba.
Ndinogona kufungidzira horsepower kubva yangu trap speed?
The quarter-mile mode runs Huntington’s formula from power and weight to a trap speed and ET. To go the other way, adjust the horsepower input until the predicted trap speed matches your measured one — that horsepower is the rough estimate.
Ndezvipi zvikonzero zvakaita kuti zvirango izvi zvive zvechokwadi?
Vacho vanoratidza ballpark. Huntington formulas kukanganwa kutambanudza, aerodynamics, gearing, kuvhura nzira uye driveline matambudziko, saka achokwadi chitima anogona kuva akawanda makumi maviri muzana yenguva off. Kuzvibata semutungamiriri, kwete chikonzero chekutambana.
API — kushandisa iyi kalkulator kubva code
Nhare iyi calculator semahara JSON endpoint - hapana chikuru zvinodiwa. Kutumira nzvimbo mavara pasi separameter query kana JSON. Chii zvachose chaunoisa kunze chinoshandisa default iyo peji iri rakasviba nayo; parameter isiri yechokwadi inonzi 400, uye haisi zero. Tora yakazara API docs →
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);Zviratidzo zvemubvunzo ndezvekufungidzira kwechinangwa chekudzidzisa chete, kwete zvemari, zvehutano kana zvemari.