Temperature Converter — Celsius, Fahrenheit, Kelvin

Convert between Celsius, Fahrenheit and Kelvin in one click. Whether you're cooking, checking the weather, or working in a lab, the formulas are applied automatically.

Questions

What is the formula for Celsius to Fahrenheit?

°F = (°C × 9/5) + 32. For example 20 °C = (20 × 1.8) + 32 = 68 °F.

Why does Kelvin not use the degree symbol?

Kelvin is an absolute scale — its zero is absolute zero, the lowest possible temperature. By SI convention, kelvins are written without a degree sign (300 K, not 300 °K).

What is room temperature in Fahrenheit?

Room temperature is usually defined as 20–22 °C, which converts to roughly 68–72 °F.