Temperature Converter
Instantly convert Celsius, Fahrenheit, Kelvin, Rankine, Reaumur and Newton. Type in any unit; all others update automatically.
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About This Converter
This temperature converter supports 6 scales and uses the exact formulas defined by the International Bureau of Weights and Measures (BIPM). Unlike simple ratio-based converters, it correctly handles the offsets between scales -- for example, °F = °C x 9/5 + 32 and K = °C + 273.15. Whether you are checking a weather forecast in an unfamiliar scale, converting oven temperatures for a recipe, or doing thermodynamics calculations, all six results update the moment you type.
FAQ
How do I convert °C to °F quickly?
Use: °F ≈ °C × 2 + 30. Exact: °F = (°C × 9/5) + 32.
What is absolute zero?
0 K (−273.15 °C, −459.67 °F): theoretical minimum thermal energy.
When to use Kelvin or Rankine?
Use K for SI scientific work; °R is the absolute scale aligned to °F (engineering legacy).
Why Réaumur or Newton?
Historical scales appearing in older literature/recipes. Included for completeness and quick reference.