Calculator

Kpọsa engine horsepower site na torke na RPM, mọọbụ kọwaa ọsọ nke n'ime kilomita iri na anọ.

Òtù —

Ike —

Nhazi ọsọ —

Echepụtara 1/4-mile ET —

Nhọrọ ndị ahụ ga-akpụzi mgbe ị na-etipụta.

Ọ bụrụ na ọbụna ọbụ

N'ihe banyere calculator 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.

Ajụjụ ndị a na-ajụkarị

Gịnị mere 5252 na horsepower formula?

Horsepower akọwapụtara dịka 33,000 ft-lb n'ime nkeji, na otu revolịshon na-ekpuchi 2π radian. N'ịkọ ndị na-adịgide na-enye HP = torque × RPM ÷ 5252, nke bụkwa ihe mere horsepower na torque curves ji na-agafe mgbe niile na 5252 RPM na dyno chart.

Olee otú ị ga-esi hụ na horsepower si n'ọnụọgụgụ kilomita?

Roger Huntington's formula na-ejikọta ọsọ ọsọ na ibu na ike: ọsọ ọsọ ≈ 234 × (hp / ibu) ^ ⅓ mph. Calculator na-ebuli ya iji hụ na ọsọ ọsọ na oge na-aga n'ihu site na ike gị na ibu, n'ụzọ doro anya na-egbochi traction na aerodynamics.

Olee oge ọbụla a ga-eji wụnye ya?

Otu mechanical horsepower bụ banyere 745.7 watts, ya mere 300 hp bụ ihe dị ka 224 kW. Calculator na-egosi kilowatt ekwivalent n'akụkụ horsepower.

Gịnị mere na otu torque na-enye dị iche iche horsepower na dị iche iche RPM?

N'ihi na ike bụ oge rotation ọsọ. HP = oge oge × RPM ÷ 5252, ya mere 300 lb-ft na-eme banyere 286 hp na 5,000 RPM ma ọ bụ naanị 143 hp na 2,500 RPM - ihe kpatara engines bụ revved iji nweta ike peak.

Gịnị bụ ike-na-ọnụọgụgụ dị mma maka kilomita iri na abụọ?

Nhazi ọsọ nke nkwụsị na-egosipụta na nwuo nke horsepower kwa pound, ya mere, ibu dị mkpa dị ka ike. N'ebe 0.1 hp kwa pound (350 hp, 3,500 lb ụgbọala) na-echekwa gị n'ebe dị nso na 110 mph nkwụsị; ibu wepụ na-enyere aka dị ka ịgbakwunye ike.

M ga-enwe ike ịtụle horsepower site n'okporo ụzọ m'okporo ụzọ?

The quarter-mile mode na-agba ọsọ Huntington's formula site na ike na ibu ka a trap ọsọ na ET. Iji gaa n'ụzọ ọzọ, gbanwee horsepower input ruo mgbe a na-atụ anya na trap ọsọ na-adaba na gị n'otu - na horsepower bụ ihe a na-atụ anya.

Ọ bụ na amụma nke kwaarị-mile dị n'ụzọ ziri ezi?

Ha bụ ballpark figures. Huntington's formulas ignore traction, aerodynamics, gearing, launch technique na driveline losses, ya mere a eziokwu ụgbọala nwere ike ịbụ ọtụtụ nde nke nke abụọ off. Treat ha dị ka a nzọụkwụ, ọ bụghị a na-ewepụ maka a timed run.

API — jiri kaadị a site na kóòdù

Kpọọ kalkulata a dịka ebe ngwụcha JSON n'efu - enweghị kii achọrọ. Ziga valiu ebe ahụ n'okpuru dịka paramita ajụjụ mọọbụ JSON. Ihe ọbụla ị na-ewepụ na-eji dìfọ́ọ̀ltụ̀ nke a na-edebe ihuakwụkwọ a na ya; parameter a na-amaghị bụ 400, ọ dịghị sẽọ̀rọ̀. Gụọ ngwe ndị ahụ niile →

Ebemkpofuozi

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);

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Ajụjụ ndị a na-ajụkarị

Calculators

Ebemkpofuozi

curl

JavaScript fetch()

JavaScript `fetch()`