Temperature Converter

The Temperature Converter switches between Celsius, Fahrenheit, and Kelvin in real time. All three scales measure the same underlying physical quantity but with different reference points and increments, and knowing when to use each is a core practical and scientific skill. Celsius, used in almost every country except the United States, sets 0 °C at the freezing point of water and 100 °C at its boiling point at standard atmospheric pressure. It's the intuitive scale for weather, cooking, medical thermometry, and everyday life across most of the world. Fahrenheit, used in the US, sets 32 °F for freezing and 212 °F for boiling — the scale is finer-grained (1.8 °F per 1 °C) which some argue makes it more intuitive for outdoor temperature ranges, but the freezing/boiling reference points feel arbitrary to non-Americans. Kelvin is the SI base unit for scientific work; 0 K is absolute zero (the theoretical lower limit of temperature), and each degree increment equals one degree Celsius. Water freezes at 273.15 K and boils at 373.15 K. The conversion formulas: °F = (°C × 9/5) + 32, °C = (°F − 32) × 5/9, K = °C + 273.15. The tool applies these with full precision so you can convert body temperature, weather forecasts, cooking temperatures, industrial process settings, and physics/chemistry problem sets without arithmetic errors. Everyday conversions: normal body temperature 37 °C = 98.6 °F; a hot summer day at 40 °C = 104 °F; freezing point 0 °C = 32 °F; room temperature 20–22 °C = 68–72 °F; a warm oven at 180 °C = 356 °F; a hot oven at 220 °C = 428 °F. When following recipes across the metric/imperial divide, always convert oven temperatures — a US recipe calling for "350 °F" is 176.6 °C, not 350 °C which would incinerate the food. For scientific and engineering work, use Kelvin whenever a formula involves absolute temperature — gas laws (PV = nRT), thermodynamic efficiency, radiation calculations, and blackbody physics all require Kelvin, not Celsius. Confusing the two produces answers that are off by hundreds of degrees. In weather and climate science, temperature anomalies (deviations from a baseline) are usually reported in Celsius or Kelvin (they're identical for differences) rather than absolute values. Everything runs entirely in your browser and works offline once loaded. Combine this converter with the Length Converter for full metric/imperial coverage, the Weight Converter for mass, and the Percentage Calculator when temperature values feed into scaling or percent-difference calculations.