Kifaa cha Kuhesabu Joto
"Tamaa hizo ni kama" halijoto kutokana na joto na unyevu, kwa kutumia mchanganyiko wa NWS Rothfusz.
Matokeo yanakuwa bora zaidi unapochapa.
Kuhusu kifaa hiki cha kupigia hesabu
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.
Maswali yaliyoulizwa mara nyingi
Faharisi ya joto ni nini?
Kiwango cha joto au halijoto ya wastani, ni jinsi inavyohisi joto linapochanganywa na halijoto ya hewa. Kwa hiyo, mvuke mwingi hupunguza mvuke wa jasho, mwili hupasha joto kwa urahisi na kuhisi joto jingi zaidi kuliko kipima - joto.
Kanuni hiyo hutumia njia gani?
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.
Viwango vya hatari vinamaanisha nini?
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.
Kwa nini unyevu - joto hufanya joto lihisi vibaya zaidi?
Sweating cools you only when the sweat evaporates. In humid air, already near saturation, evaporation slows, so the body sheds heat poorly and the same 90 °F feels far hotter at 80% humidity than at 30%.
Kwa nini hesabu hiyo inasema "hakuna mkazo unaosababishwa na joto" katika siku yenye joto?
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.
Faharisi ya joto hutofautianaje na baridi ya upepo?
Hizo ni marekebisho tofauti: faharisi ya joto huongeza joto kutokana na unyevu katika hali ya hewa yenye joto, hali baridi ya upepo huondoa joto lionekanalo kutokana na upepo wakati wa baridi.
Je, faharisi ya joto huchukua kivuli au jua?
Jua linaweza kuongeza joto la nyuzi 15 Selsiasi kwenye kiwango cha joto, kwa hiyo thamani halisi ya rangi nje ya jua ni juu kuliko kiasi kinachorudi kwa mashine hiyo ya kupiga hesabu.
API bustanini hutumia kifaa hiki cha hesabu kutoka kwenye mfumo wa sheria
Ipigie simu kifaa hiki cha kupigia hesabu kama Junse É not doot toder. Chochote unachoacha kinatumia kiwango kilekile cha mwisho ambacho ukurasa huu haujakamilika; parameta isiyojulikana ni 400, si sufuri kimya kamwe. Soma habari kamili za API docs →
keyboard label
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);Matokeo ni makadirio ya mwongozo wa ujumla, si wa kifedha, wa kitiba au wa kodi tu.