Heat Index Calculator
"Kanggo" bisa dipaké pikeun ngajelaskeun suhu, suhu, sareng kalembaban, nganggo rumus NWS Rothfuss.
Hasilne bakal dioptimalake nalika sampeyan ngetik.
Ngenai kalkulator iki
The heat index, or apparent temperature, is how hot it really feels when humidity is combined with the air temperature, and this heat index calculator computes it from those two inputs. The body cools itself by evaporating sweat, but humid air is already close to saturated so sweat evaporates slowly, the cooling falters, and it feels hotter than the thermometer says. The tool uses the U.S. National Weather Service Rothfusz regression, a multi-term fit of temperature and relative humidity, together with its standard low- and high-humidity corrections.
As a worked example, 90 °F air at 60% relative humidity carries a heat index of about 100 °F — ten degrees hotter than the reading — and pushing the humidity to 80% drives it past 110 °F. The calculator returns the feels-like temperature, how much hotter that is than the air, and a humidity table so you can see how quickly the danger rises as the air grows muggier at a fixed temperature.
The regression is most accurate around 80 °F (27 °C) and above with meaningful humidity; below about 80 °F it reports no heat stress because humidity has little effect on comfort in cool air. It also grades the reading into the NWS danger bands — caution, extreme caution, danger and extreme danger — so a heat index above 103 °F signals a real risk of heat cramps or exhaustion, and above 125 °F a high risk of heat stroke, which is vital for planning outdoor work, sport and travel in hot weather.
Takon-takon kang kerep diajukake
Apa iku indeks panas?
Indeks panas, atawa suhu nyata, nyaéta kumaha panasna rasana nalika kalembaban relatif digabungkeun sareng suhu udara. Kalembaban luhur ngalambangkeun evaporasi semu, janten awak henteu gampang ngaleupaskeun panas sareng ngarasa langkung panas tibatan anu dibaca ku thermometer.
Formula apa sing digunakake?
NWS Rothfusz regresi: HI = −42.379 + 2.04901523T + 10.14333127R − 0.22475541TR − … (sareng T dina °F lan R dina %), plus panyesuaian pikeun kelembapan anu sangat rendah atanapi sangat tinggi.
Apa tegese tingkat bahaya?
Temperature: 80-90 °F (22-25 °C) - suhu anu paling luhur, 90-103 °F (22-25 °C) - suhu anu paling handap, 103-124 °F (22-25 °C) - suhu anu paling handap, 125 °F (25-28 °C) - suhu anu paling luhur, 130 °F (30-32 °C) - suhu anu paling handap.
Apa sing bisa ditindakake kanggo nambah suhu?
Ing udara lembab, wis cedhak karo kelembapan, evaporasi alon, mula awak ora bisa ngeculake panas kanthi apik lan suhu 90 °F sing padha luwih panas ing 80% kelembapan tinimbang ing 30%.
Kenapa kalkulator ngomong "ora ana stres panas" ing dina sing adhem?
Indeks panas ngan ditangtukeun pikeun kaayaan panas — kira-kira 80 °F (27 °C) sarta luhur. Di handapeun éta, kelembaban henteu ngarobah kumaha hawa dirasakeun, jadi alat ngalaporkeun suhu udara biasa tibatan anu katingali.
Apa sing diarani indeks panas beda karo angin chill?
Éta nyaéta panyegah anu sabalikna: indeks panas ngatambahkeun panas anu katingali ti kalembaban nalika cuaca panas, sedengkeun angin tiis ngaleungitkeun panas anu katingali ti angin nalika cuaca tiis. Indeks panas butuh suhu jeung kalembaban; angin tiis butuh suhu jeung kecepatan angin.
Apa indeks panas nganggep bayangan utawa srengenge?
Ieu dikalkulasi pikeun bagéan anu ngabayangkeun. Cahaya panonpoé langsung bisa nambahkeun nepi ka 15 °F ka suhu anu dirasakeun, jadi nilai anu dirasakeun dina luar ruangan dina panonpoé pinuh leuwih luhur ti angka anu dipulangkeun ku kalkulator ieu.
API — gunakake kalkulator iki saka kode
Ngadongékeun kalkulator ieu minangka titik akhir JSON bébas — teu peryogi kunci. Kirim nilai medan di handapeun minangka parameter pitakonan atawa JSON. Anything you omit uses the same default this page is pre-filled with; an unknown parameter is a 400, never a silent zero. Waca dokumen lengkap API →
Tampilan
GET https://calculator.free/api/v1/heat-index/curl
curl "https://calculator.free/api/v1/heat-index/?units=imperial&temp=90&humidity=60"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/heat-index/?" + new URLSearchParams({
"units": "imperial",
"temp": "90",
"humidity": "60"
}));
const data = await r.json();
console.log(data.results);Hasilna nyaéta perkiraan pikeun pituduh umum, henteu saran finansial, médis atanapi pajak.