Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin instantly. Essential for cooking, science, weather, and travel between metric and imperial countries.
How to calculate Temperature
Temperature is measured on three main scales: Celsius, Fahrenheit, and Kelvin — each serving different purposes in daily life and science.
Celsius (°C) is used by most of the world for weather, cooking, and everyday temperature. Water freezes at 0°C and boils at 100°C at sea level. It is part of the metric (SI) system.
Fahrenheit (°F) is used primarily in the United States. Water freezes at 32°F and boils at 212°F. Human body temperature is 98.6°F (37°C).
Kelvin (K) is the SI base unit for temperature, used in physics and chemistry. It starts at absolute zero (−273.15°C), the coldest possible temperature. There are no negative Kelvin values.
Conversion formulas: °F = (°C × 9/5) + 32; °C = (°F − 32) × 5/9; K = °C + 273.15.
Useful reference points: −40° is the same in both Celsius and Fahrenheit. Room temperature is about 20–22°C (68–72°F). Oven temperatures in recipes vary — a "moderate" oven is 180°C / 350°F. Understanding all three scales is useful for anyone who travels, cooks, or studies science.