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Temperature

Celsius, Fahrenheit, Kelvin and Rankine, all at once.

Reference points
Water freezes 0ยฐC ยท boils 100ยฐC ยท body 37ยฐC
Conversion
Celsius (ยฐC)     25
Fahrenheit (ยฐF)  77
Kelvin (K)       298.15
Rankine (ยฐR)     536.67

๐Ÿ˜Œ Comfortable

About the Temperature

Convert between Celsius, Fahrenheit, Kelvin and Rankine with all four fields live at once โ€” edit any of them and the others update instantly. A plain-language summary rates the temperature from extremely cold to extremely hot, and reference points for freezing, boiling and body temperature sit above the inputs.

How to use the Temperature

  1. Type a value into any of the four unit fields โ€” Celsius, Fahrenheit, Kelvin or Rankine.
  2. Watch the other three fields recalculate immediately.
  3. Check the Conversion box for a tidy list of all four values.
  4. Glance at the description line for a quick feel of the temperature.

Temperature FAQ

Which field should I edit?

Any one of them โ€” the field you type in becomes the source and the label marks it as editing, so there is no separate from/to selection to worry about.

What are the exact formulas?

Fahrenheit uses the standard offset formulas (ร—9/5 + 32 and its inverse), Kelvin is Celsius plus 273.15, and Rankine is derived from Kelvin with a 1.8 factor.

What do the reference points mean?

They anchor expectations: water freezes at 0ยฐC, boils at 100ยฐC and body temperature is about 37ยฐC, which helps you sanity-check any conversion at a glance.