How to use the temperature converter
Type any temperature (including negative values) into Value and pick the source and target scales. The converter instantly shows the equivalent in Celsius (°C), Fahrenheit (°F), and Kelvin (K).
Temperature conversion formulas
- Celsius to Fahrenheit:
°F = (°C × 9/5) + 32(or°C × 1.8 + 32) - Fahrenheit to Celsius:
°C = (°F − 32) × 5/9 - Celsius to Kelvin:
K = °C + 273.15 - Kelvin to Celsius:
°C = K − 273.15 - Fahrenheit to Kelvin:
K = (°F − 32) × 5/9 + 273.15
Common temperature reference benchmarks
| Benchmark | Celsius (°C) | Fahrenheit (°F) | Kelvin (K) |
|---|---|---|---|
| Absolute zero | −273.15 °C | −459.67 °F | 0 K |
| Celsius / Fahrenheit crossover | −40 °C | −40 °F | 233.15 K |
| Water freezes (1 atm) | 0 °C | 32 °F | 273.15 K |
| Typical room temperature | 20 °C | 68 °F | 293.15 K |
| Average human body temperature | 37 °C | 98.6 °F | 310.15 K |
| Water boils (1 atm) | 100 °C | 212 °F | 373.15 K |
| Moderate oven baking | 180 °C | 356 °F | 453.15 K |
Frequently asked questions
- How do you convert Celsius to Fahrenheit and Fahrenheit to Celsius?
- To convert Celsius to Fahrenheit, multiply by 9/5 (or 1.8) and add 32:
°F = (°C × 1.8) + 32. To convert Fahrenheit to Celsius, subtract 32 and multiply by 5/9:°C = (°F − 32) × 5/9. - At what temperature are Celsius and Fahrenheit equal?
- Celsius and Fahrenheit meet at −40 degrees: −40 °C is equal to −40 °F.
- How do you convert Celsius to Kelvin?
- Add 273.15 to the Celsius temperature:
K = °C + 273.15. A change of 1 K is identical in magnitude to a change of 1 °C, and 0 K (−273.15 °C) is absolute zero.