Hesabu ya Kituo cha Kufunika Mwasu
Pata mahali pa umande kutokana na halijoto ya hewa na unyevu wa kadiri, kukiwa na kiwango cha starehe.
Matokeo yanakuwa bora zaidi unapochapa.
Kuhusu kifaa hiki cha kupigia hesabu
The dew point is the temperature to which air must be cooled for its water vapour to start condensing into dew, and it is the most honest single measure of how much moisture the air actually holds. A higher dew point means more water in the air and a muggier, stickier feel; it is also the temperature at which fog forms, grass gets damp overnight and a cold drink beads with condensation. This dew point calculator derives it from the air temperature and the relative humidity you enter.
It uses the Magnus-Tetens approximation with the Alduchov-Eskridge coefficients (a = 17.625, b = 243.04 °C): first γ = ln(RH / 100) + aT / (b + T), then the dew point = bγ / (a − γ), with T in °C. As a worked example, air at 25 °C and 60% relative humidity has a dew point of about 16.7 °C — comfortable edging toward sticky. Drop the humidity to 30% at the same 25 °C and the dew point falls to roughly 6 °C, distinctly dry. The method is accurate to within a few tenths of a degree across ordinary weather, and the tool works in either °C or °F.
Dew point predicts comfort far better than relative humidity, because relative humidity depends on temperature: 90% humidity on a cold morning feels dry, while 60% on a hot afternoon feels oppressive. As an absolute measure, dew point cuts through that — below about 13 °C (55 °F) feels comfortable, 16–18 °C (60–65 °F) starts to feel sticky, and above 21 °C (70 °F) is oppressive and hard to cool down in. The same value tells you when condensation will form on windows, pipes and aircraft surfaces.
Maswali yaliyoulizwa mara nyingi
Ni kanuni gani inayotumiwa kuhusiana na umande?
The Magnus-Tetens approximation with Alduchov-Eskridge constants: γ = ln(RH/100) + 17.625·T/(243.04+T), and dew point = 243.04·γ/(17.625−γ), with T in °C. It is accurate to within a few tenths of a degree over normal weather conditions.
Kwa nini umande hauonyeshi tu unyevu?
Unyevu wa kiasi hutegemea halijoto, kwa hiyo asilimia 90 ya unyevu wa hewa katika nyuzi 10 za Selsiasi hukauka ilhali asilimia 60 ya Selsiasi 30 huhisi unyevu.
Ni kiwango gani cha umande kinachostarehesha?
Below about 13 °C (55 °F) feels comfortable and dry, 16–18 °C (60–65 °F) starts to feel sticky, and above 21 °C (70 °F) is oppressive and hard to cool down in.
Je, kiwango cha umande kinaweza kuwa juu kuliko halijoto ya hewa?
Kwa kawaida kiwango cha umande ni sawa na halijoto ya hewa, ambayo hutokea kwa asilimia 100 wakati hewa imelowa kabisa.
Hali ya umande inahusianaje na ukungu na umande?
Wakati ambapo sehemu za juu za milima au hewa ni baridi, grabu huganda wakati umande unapotua juu ya nyasi, namna za ukungu na shanga za kupoa juu ya gilasi baridi.
Je, umande hubadilika halijoto inapobadilika?
Not on its own — the dew point reflects the actual moisture content, which stays put as the air warms or cools. What changes with temperature is the relative humidity, which is why dew point is the steadier measure of muggy air.
Kanuni ya Magnus-Tetens ni sahihi kadiri gani?
Kwa kutumia eklockectory ya Aldochov-Eskridge ni sahihi kwa asilimia chache ya digrii Selsiasi kuvuka kiwango cha kawaida cha halijoto na unyevunyevu, ambao uko katika usahihi wa vipimo vya unyevu wa kila siku.
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/dew-point/curl
curl "https://calculator.free/api/v1/dew-point/?units=c&temp=25&humidity=60"JavaScript fetch()
const r = await fetch(
"https://calculator.free/api/v1/dew-point/?" + new URLSearchParams({
"units": "c",
"temp": "25",
"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.