Convert between Celsius, Fahrenheit, and Kelvin instantly — the three temperature scales used in daily life and science.
How it works
- Select Celsius, Fahrenheit, or Kelvin for your starting and target inputs.
- Enter the degrees.
- The calculator runs the exact algebraic conversion formula to give you the precise temperature.
Frequently asked questions
Where do the scales meet?
−40° — the one temperature where Celsius and Fahrenheit read the same.
Why does science use Kelvin?
Kelvin starts at absolute zero, so it has no negative values and works directly in physics equations.
Body temperature in each scale?
37 °C = 98.6 °F = 310.15 K (typical, varies by person and time of day).