Áireamhán Capallchumhachta
Ríomh capall cumhachta inneall ó chasmhóimint agus RPM, nó luas gaiste ceathrú míle a mheas.
Torthaí a nuashonrú mar a chlóscríobh tú.
Maidir leis an áireamhán seo
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.
Ceisteanna Coitianta
Cén fáth go bhfuil 5252 san fhoirmle capallchumhachta?
Sainmhínítear horsepower mar 33,000 ft-lb in aghaidh an nóiméid, agus scuabtha ceann amháin réabhlóid 2π raidiam. Ag comhcheangal na tairiseach a thugann HP = chasmhóimint × RPM ÷ 5252, a bhfuil freisin cén fáth a bhfuil an horsepower agus torque curves trasna i gcónaí ag 5252 RPM ar chairt dyno.
Conas a mheasann tú horsepower ón míle ceathrú?
Nascann foirmle Roger Huntington luas gaiste agus meáchan le cumhacht: luas gaiste ≈ 234 × (HP / meáchan) ^ ⅓ mph.Inverts an t-áireamhán é a mheas luas gaiste agus am a rith ó do chumhacht agus meáchan, treoir garbh a dhéanann neamhaird tarraingt agus aerodynamics.
Cé mhéad vata atá i gceann capallchumhachta?
Tá ceann capall cumhachta meicniúil thart ar 745.7 vata, mar sin tá 300 hp thart ar 224 kW.Taispeánann an t-áireamhán an coibhéis chileavat in éineacht capall cumhachta.
Cén fáth a dtugann an chasmhóimint chéanna horsepower difriúil ag RPM éagsúla?
HP = chasmhóimint × RPM ÷ 5252, mar sin déanann 300 lb-ft thart ar 286 hp ag 5,000 RPM ach amháin 143 hp ag 2,500 RPM - an chúis innill a revved chun teacht ar bhuaicchumhacht.
Cad é cóimheas cumhachta-go-meáchan maith le haghaidh míle ceathrú tapa?
Scálaí luas Gaiste leis an fréamh ciúb capall cumhachta in aghaidh an punt, mar sin tá meáchan chomh mór le cumhacht. thart ar 0.1 hp in aghaidh an punt (350 hp, 3,500 lb carr) cuireann tú in aice le gaistí 110 mph; shedding meáchan Cuidíonn díreach mar a chumhacht a chur leis.
An féidir liom horsepower a mheas ó mo luas gaiste?
Ritheann an modh ceathrú míle foirmle Huntington ó chumhacht agus meáchan go luas gaiste agus ET. Chun dul ar an mbealach eile, an t-ionchur horsepower a choigeartú go dtí go gcomhlíonann an luas gaiste réamh-mheasta do cheann tomhaiste - is é an horsepower an meastachán garbh.
An bhfuil na meastacháin ceathrú-mhíle cruinn?
Tá siad figiúirí ballpark. foirmlí Huntington neamhaird tarraingt, aerodynamics, giaráil, teicníc seoladh agus caillteanais driveline, mar sin is féidir le carr fíor a bheith roinnt deichiú cuid de dara amach. chóireáil leo mar threoir, ní ionadaí do rith uainiúcháin.
API — úsáid an áireamhán seo ó chód
Glaoigh ar an áireamhán seo mar chríochphointe JSON saor in aisce - níl aon eochair ag teastáil. Seol na luachanna réimse thíos mar pharaiméadair cheist nó JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Léigh an doiciméadú iomlán API →
Deireadhphointe
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);Is meastacháin iad na torthaí le haghaidh treoir ghinearálta amháin, ní comhairle airgeadais, leighis nó cánach.