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Temperature converter

Convert temperatures between Celsius, Fahrenheit, Kelvin and Rankine. To go from °C to °F, multiply by 1.8 and add 32.

Result

-6.66667°C

°C = (°F − 32) ÷ 1.8

On the thermometer
32 °F98.6 °F212 °F
0 °C37 °C100 °C
  • 0 °C · Water freezes
  • 37 °C · Body temperature
  • 100 °C · Water boils

20 °F = -6.667 °C

Quick challenge

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Guess the conversion before you calculate it. How many can you get in a row?

How it works

Temperature scales differ in both size of degree and zero point, so they need a formula rather than a single factor. A Celsius degree is the same size as a kelvin, while a Fahrenheit degree is 5/9 of that. Water freezes at 0 °C (32 °F, 273.15 K) and boils at 100 °C (212 °F) at sea level.

All units compared

All units compared
UnitSymbolFormula
degree Celsius°C—
degree Fahrenheit°F°F = °C × 1.8 + 32
kelvinKK = °C + 273.15
degree Rankine°R°R = °C × 1.8 + 491.67

Frequently asked questions

At what temperature are Celsius and Fahrenheit equal?

At -40 degrees: -40 °C is exactly -40 °F.

What is normal body temperature in Fahrenheit?

The traditional reference of 37 °C equals 98.6 °F. Normal readings vary from person to person and during the day.

What is 1 °F in degrees Celsius?

1 °F = -17.2222 °C, using °C = (°F − 32) ÷ 1.8.

What is 1 °C in degrees Fahrenheit?

1 °C = 33.8 °F, using °F = °C × 1.8 + 32.

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