Convert Celsius, Fahrenheit and Kelvin in one tap.
Convert between Celsius (°C), Fahrenheit (°F) and Kelvin (K) using exact formulas. Useful for cooking, science, weather and travel.
C → F: (C × 9/5) + 32. F → C: (F − 32) × 5/9. C → K: C + 273.15. K → C: K − 273.15. F ↔ K conversions chain through Celsius.
Yes for Celsius and Fahrenheit. Kelvin cannot be negative — 0 K (absolute zero) is the lower bound and the calculator will warn you.
Mental shortcuts (like ‘double and add 30’ for °C → °F) are approximations. This calculator uses exact formulas.
No — Kelvin is an SI base unit and is written ‘K’ without the ° symbol (e.g. 300 K).