Temperature Converter

About the Temperature

This temperature converter instantly converts between Celsius, Fahrenheit, and Kelvin — the three scales you are most likely to encounter. It is the simplest and most accurate way to get from °C to °F and back, whether you are cooking with a recipe from abroad, checking weather in a different country, or working in science. The conversion formulas are the heart of it. To convert Celsius to Fahrenheit: °F = (°C × 9/5) + 32. So 20°C is (20 × 1.8) + 32 = 68°F. To convert Fahrenheit to Celsius: °C = (°F − 32) × 5/9. So 68°F is (68 − 32) × 0.556 = 20°C. Two useful anchors: 0°C = 32°F (freezing), and 100°C = 212°F (boiling). And 21°C ≈ 70°F, so room temperature in metric and imperial land are roughly the same. Kelvin is the SI base unit of temperature and starts at absolute zero, the coldest possible temperature where all molecular motion stops: 0 K = −273.15°C. To convert Celsius to Kelvin, add 273.15; to convert Kelvin to Celsius, subtract 273.15. Kelvin is used in physics, astronomy, and engineering because it has no negative values — useful for doing calculations involving temperature differences and thermochemistry. People constantly need this in the kitchen and when travelling. A recipe in a German cookbook that says "bake at 180°C" is 356°F for an American oven. A UK weather forecast of 10°C is 50°F for a visitor from the US. And a lab report in Kelvin converts easily to Celsius to compare with everyday experience. The converter handles all three instantly, so you never mis-bake a cake or dress for the wrong weather again.