Kaitirotiro kaha ā-haurangi
Ka tatau i te hiko mīhini mai i te whakarerekētanga me te RPM, te whakatara rānei i te tere o te kōaro.
Ka whakahōutia ngā hua i te wā e tātuhi ana.
Mo tēnei tātaitai
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.
Ko nga pātai e pā ana
He aha te 5252 i roto i te tātai hiko āhua?
E tautuhia ana te hiko āhuarangi hei 33,000 ft-lb i ia minu, ā, ka whakawāteatia tētahi hurihanga e 2π rārangi. Mā te whakakotahi i ngā tautū e tuku ana i HP = torque × RPM ÷ 5252, ko te take hoki o te hiko āhuarangi me ngā ānau torque e whakawhiti ana i ngā wā katoa i te 5252 RPM i runga i tētahi tātai dyno.
He pēhea te whakatau i te hiko kākahu mai i te haurua mai i te mātao?
Ko te tātai a Roger Huntington e hono ana i te tere me te taumahatanga ki te hiko: te tere o te whakarerekētanga ≈ 234 × (hp/taumaha) ^⅓ mph. Ka whakarerekētia e te tātaitai hei whakatau i te tere o te whakarerekētanga me te wā e haere ana mai i tō tātou hiko me te taumahatanga, he kaiārahi pōturi e whakakāhore ana i te whakatere me te āhua o te rererangi.
He maha nga watts he mana āhuarangi kotahi?
Tata ki te 745.7 watts te hiko pūkaha kotahi, nō reira ko te 300 hp tata ki te 224 kW. E whakaatu ana te tātaitai i te ōritetanga kilowati i te taha o te hiko ā-hau.
He aha te āhua o te kōaro ōrite e tuku ana i tētahi hiko āhua rerekē i roto i ngā RPM rerekē?
Nā te mea ko te hiko te tere o te nekeneke i ngā wā hurihanga. HP = nekeneke × RPM ÷ 5252, nā reira ko te 300 lb-ft e tata ana ki te 286 hp i te 5,000 RPM engari ko te 143 hp anake i te 2,500 RPM — ko te take e whakarewa ana ngā mīhini kia tae ki te hiko tiketike.
He aha te ōwehenga kaha-ki-ngā taumaha pai mō te haurua-miraka tere?
Ko te tere o te tāhae e tauinetia ana e te pūtake kupiki o te hiko āhuarangia pū, nō reira he nui te taumahatanga pērā ki te hiko. Tata ki te 0.1 hp i ia pū (350 hp, 3,500 lb tākaro) ka tata ki te 110 mph ngā tāhae; Ka āwhina te whakawāteatanga o te taumahatanga ki te tāpiri i te hiko.
Ka taea e au te whakatau i te hiko o te kākahu mai i tōku tere tākaro?
Ka haere te āhuatanga hauwhā-mārō i te tātai a Huntington mai i te hiko me te taumaha ki te tere ā-kawe me te ET. Hei haere ki te taha atu, ka whakaritea te tāuru hiko ā-kawe tae noa ki te ōritetanga o te tere ā-kawe i matapaetia ki tō tātou tātaitanga — ko te hiko ā-kawe te whakatau tata.
He tika te whakatau tata o te rau tau?
Ko ēnei ngā taupū o te pāpāho. Ka whakakāhore ngā tātai a Huntington i te whakatere, te rererangi, te whakarerekētanga, te pūkenga whakarewa me ngā ngaromanga, kia taea ai e tētahi waka tūturu te whakarerekē i ngā tekau o te rua. Ka whakaarotia hei kaiārahi, ehara i te whakahōutanga mō te whakatere ā-whāiti.
API — whakamahi tēnei tātaitai mai i te waehere
E kī ana tēnei tātaitai hei wāhi mutunga kore JSON - kāore he kī e hiahiatia ana. Ka tukuna ngā uara āpure i raro nei hei tohutoro pātai, JSON rānei. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Ka pānui te papatono API katoa →
Whakamutunga
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);Ko ngā hua he whakataunga mō te tohutohu ahuwhānui anake, ehara i te tohutohu moni, rongoā, tāke rānei.