Unit Conversion TablesSI and customary units, exact factors where defined
Formulas
- C to F
- F = C × 9/5 + 32
- F to C
- C = (F − 32) × 5/9
- C to K
- K = C + 273.15
- K to C
- C = K − 273.15
Reference points
- Absolute zero
- −273.15 °C
- Water freezing
- 0 °C / 32 °F
- Water boiling
- 100 °C / 212 °F
- Scales meet
- −40 °C = −40 °F
Common values
- −10 °C
- 14 °F
- 20 °C
- 68 °F
- 37 °C
- 98.6 °F
- 180 °C
- 356 °F
Intervals
- 1 °C step
- 1.8 °F step
- 1 K step
- 1 °C step
- 1 °F step
- 0.5556 °C step
- 1 °R step
- 1 °F step
Boiling and freezing points refer to a pressure of one standard atmosphere. The kelvin and the degree Celsius have the same interval size.