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Ngenai kalkulator iki
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.
Takon-takon kang kerep diajukake
Apa formula sing digunakake kanggo titik dew?
Perkiraan Magnus-Tetens kalayan konstanta Alduchov-Eskridge: γ = ln(RH/100) + 17.625·T/(243.04+T), sarta titik lebur = 243.04·γ/(17.625−γ), kalayan T dina °C. Éta akurat dina sababaraha puluhan derajat dina kaayaan cuaca normal.
Apa tegese titik beku luwih penting tinimbang kelembapan?
Kalembaban relatif gumantung kana suhu, janten 90% kalembaban dina 10 ° C ngarasa garing sedengkeun 60% dina 30 ° C ngarasa muggy. titik debu nyaéta ukuran mutlak kalembaban, janten éta ngalacak kumaha lebet udara leres-leres ngarasa langkung saé.
Apa sing dadi titik beku?
Dina suhu 13 °C (55 °F) rasana nyaman sarta kering, 16–18 °C (60–65 °F) mimiti rasana leleh, sarta di luhur 21 °C (70 °F) rasana ngageter sarta susah pikeun mendingan.
Bisakah titik beku luwih dhuwur tinimbang suhu udara?
Teu. Punten titik kabut sarua jeung suhu udara, anu lumangsung dina 100% kalembaban relatif nalika udara kacida kacampurna. Satiap pendingin jeung uap ngakondensasi, jadi titik kabut salawasna aya dina atawa handapeun suhu ayeuna.
Apa titik dew ana gandhengane karo awan lan dew forming?
Nalika permukaan atawa udara tiis nepi ka titik kabut, uap cai ngakondensasi - nyaéta nalika kabut ngaleupaskeun kana taneuh, ngabentuk kabut, sarta ngabentuk kristal kondensasi dina kaca anu tiis. Titik kabut anu caket ka titik kabut panghandapna dina wengi nyaéta tanda anu saé yén kabut atawa kabut mungkin.
Apa titik beku bakal owah nalika suhu owah?
Teu sorangan - titik kabut ngagambarkeun kandungan kabut anu saleresna, anu tetep aya nalika udara panas atanapi tiis. Anu ngarobah sareng suhu nyaéta kabut relatif, anu sabab titik kabut nyaéta ukuran anu langkung stabil tina udara muggy.
Apa sing diarani "formula" iku?
Dina kasus anu paling umum, suhu anu diukur dina suhu kamar nyaéta 100 °C. Dina kasus anu paling jarang, suhu anu diukur dina suhu kamar nyaéta 0 °C. Dina kasus anu paling umum, suhu kamar nyaéta 100 °C.
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/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);Hasilna nyaéta perkiraan pikeun pituduh umum, henteu saran finansial, médis atanapi pajak.