CalcVerse

Temperature Converter

Celsius and Kelvin use the same size of degree but a different zero; Fahrenheit uses smaller degrees, 1.8 to every Celsius degree, and puts water’s freezing point at 32.

  • Last updated
  • Formula tested against reference values

Your numbers

Unit

Result

Fahrenheit
—°F

Calculating…

Celsius
—
Kelvin
—

How to use this calculator

  1. Enter or choose temperature.
  2. Enter or choose unit.
  3. The fahrenheit updates as you type. Use Copy result or Share to keep it.

Formula

°F=°C×95+32

°F = °C × 9/5 + 32; °C = (°F − 32) × 5/9; K = °C + 273.15

Worked example

  1. 100 × 9/5 = 180.
  2. 180 + 32 = 212 °F.
  3. 100 + 273.15 = 373.15 K.

Water boils at 100 °C = 212 °F = 373.15 K at sea-level pressure.

What the result means

At −40 the Celsius and Fahrenheit scales meet. A quick mental estimate for °C to °F is double and add 30; the calculator gives the exact value.

Assumptions and limits

  • Values below absolute zero (0 K) are rejected because they are physically impossible.

Questions

Why is there no “degrees” Kelvin?

Kelvin is an absolute SI unit written simply as K, so 300 K, not 300 °K.

Sources