Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin with instant results.
Temperature Conversion Formulas
Temperature is measured in three main scales: Celsius (used internationally), Fahrenheit (used in the US), and Kelvin (used in science). Each scale has different zero points and degree increments.
- Celsius to Fahrenheit: °F = (°C × 9/5) + 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
Celsius to Fahrenheit Quick Reference
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| −40 °C | −40 °F |
| −20 °C | −4 °F |
| 0 °C | 32 °F |
| 10 °C | 50 °F |
| 20 °C | 68 °F |
| 25 °C | 77 °F |
| 30 °C | 86 °F |
| 37 °C | 98.6 °F |
| 40 °C | 104 °F |
| 100 °C | 212 °F |
Frequently Asked Questions
How do I convert Celsius to Fahrenheit?
Multiply by 9/5 then add 32. Formula: °F = (°C × 1.8) + 32.
What is absolute zero in Celsius?
Absolute zero is −273.15°C, or 0 Kelvin — the coldest possible temperature.
At what temperature are Celsius and Fahrenheit equal?
They are equal at −40°. Both scales meet at −40°C = −40°F.
What is normal body temperature in Fahrenheit?
Normal human body temperature is 98.6°F (37°C).