Kalkulator Indeks Panas
Suhu "merasa seperti" dari panas dan kelembaban, menggunakan rumus NWS Rothfusz.
Hasil update saat Anda mengetik.
Tentang kalkulator ini
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.
Sering kali mengajukan pertanyaan
Apa itu indeks panas?
Indeks panas, atau suhu yang jelas, adalah bagaimana panasnya ketika kelembaban yang relatif dikombinasikan dengan suhu udara. kelembaban tinggi memperlambat penguapan keringat, sehingga tubuh mengurangi panas kurang mudah dan terasa lebih panas daripada yang dibaca termometer.
Apa rumus ini menggunakan?
The NWS Rothfusz regression: HI = −42.379 + 2.04901523T + 10.14333127R − 0.22475541TR − … (with T in °F and R in %), plus corrections for very low or very high humidity. It is most accurate at about 80 °F and warmer.
Apa artinya tingkat bahaya?
Roughly: 80–90 °F is caution, 90–103 °F extreme caution, 103–124 °F danger (heat cramps or exhaustion likely) and 125 °F or above extreme danger with a high risk of heat stroke.
Mengapa kelembapan membuat panas terasa lebih buruk?
Keringat mendinginkan Anda hanya ketika keringat menguap di udara lembab, sudah dekat jenuh, penguapan lambat, sehingga tubuh menumpahkan panas buruk dan 90 °F yang sama terasa jauh lebih panas pada kelembaban 80% dari 30%.
Mengapa kalkulator mengatakan "tidak ada stres panas" pada hari yang hangat?
The heat index is only defined for hot conditions — roughly 80 °F (27 °C) and up. Below that, humidity barely changes how the air feels, so the tool reports the plain air temperature rather than an apparent one.
Bagaimana indeks panas berbeda dari dingin angin?
Indeks panas adalah koreksi yang berlawanan dengan arah: indeks panas menambah kehangatan yang jelas dari kelembapan pada cuaca panas, sementara angin mengurangi kehangatan yang jelas dari angin pada cuaca dingin.
Apakah indeks panas mengasumsikan bayangan atau matahari?
It is calculated for shade. Direct sunlight can add as much as 15 °F to the felt temperature, so the real feels-like value outdoors in full sun is higher than the figure this calculator returns.
API — use this calculator from code
Sebut kalkulator ini sebagai titik akhir JSON Gratis tidak diperlukan kunci. Kirim nilai ruas di bawah sebagai parameter query atau JSON. Apa pun yang Anda abaikan menggunakan baku yang sama halaman ini sudah diisi dengan; sebuah parameter tidak diketahui adalah 400, tidak pernah nol diam. Baca dokumen API penuh →
Titik Akhir
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);Hasil diperkirakan hanya untuk bimbingan umum, bukan keuangan, medis atau pajak.