Temperature converters
Celsius, Fahrenheit, Kelvin and Rankine conversions, body temperature and charts. Every tool below is free, works instantly in your browser and explains the formula behind the result.
Temperature scales differ in both their zero point and the size of a degree, which is why converting between them needs more than a simple multiplication. Celsius and Kelvin share the same degree size, as do Fahrenheit and Rankine, while Kelvin and Rankine both start at absolute zero. The converters here use the exact defining formulas, show every step, and include charts for the values people look up most — from weather and body temperature to oven settings.
21 tools in this category
- Celsius to FahrenheitConvert °C to °F instantly.
- Celsius to Fahrenheit ChartPrintable °C to °F chart.
- Celsius to Fahrenheit FormulaThe formula explained.
- Fahrenheit to CelsiusConvert degrees Fahrenheit to degrees Celsius.
- Celsius to KelvinConvert degrees Celsius to kelvins.
- Kelvin to CelsiusConvert kelvins to degrees Celsius.
- Fahrenheit to KelvinConvert degrees Fahrenheit to kelvins.
- Kelvin to FahrenheitConvert kelvins to degrees Fahrenheit.
- Fahrenheit to RankineConvert degrees Fahrenheit to degrees Rankine.
- Kelvin to RankineConvert kelvins to degrees Rankine.
- Rankine ConverterConvert any temperature between Rankine, Fahrenheit, Celsius and Kelvin.
- Body Temperature ConverterConvert a thermometer reading between °C and °F and check it against commonly used fever thresholds.
- Fever Temperature ChartUse these charts to read a thermometer in Celsius or Fahrenheit and see whether it shows a fever.
- Fahrenheit to Celsius ChartA printable Fahrenheit to Celsius chart.
- All-in-One Temperature ConverterType a temperature in any scale and instantly see it in all eight: Celsius, Fahrenheit, Kelvin, Rankine, Réaumur, Delisle, Newton and Rømer.
- Réaumur ConverterConvert temperatures between the historical Réaumur scale and Celsius, Fahrenheit and Kelvin — useful for old recipes, cheese making and historical texts.
- Delisle, Newton & Rømer ConverterExplore three historical temperature scales — Delisle, Newton and Rømer — and convert them to and from today’s Celsius, Fahrenheit and Kelvin.
- Temperature Difference Converter (ΔC to ΔF)Convert a temperature change — a rise, drop or difference — between Celsius, Fahrenheit, Kelvin and Rankine.
- Negative Temperature ConverterConvert below-zero temperatures between Celsius and Fahrenheit without sign mistakes, and see where the two scales cross at −40.
- Printable Temperature Table GeneratorMake a custom temperature conversion table for your kitchen, lab or classroom.
- Body Temperature by MethodA “normal” temperature depends on where it is measured.
Popular conversions
- -40 Fahrenheit to Celsius
- 0 Fahrenheit to Celsius
- 32 Fahrenheit to Celsius
- 50 Fahrenheit to Celsius
- 60 Fahrenheit to Celsius
- 68 Fahrenheit to Celsius
- 70 Fahrenheit to Celsius
- 75 Fahrenheit to Celsius
- 80 Fahrenheit to Celsius
- 90 Fahrenheit to Celsius
- 98.6 Fahrenheit to Celsius
- 100 Fahrenheit to Celsius
- 350 Fahrenheit to Celsius
- 400 Fahrenheit to Celsius
- 450 Fahrenheit to Celsius
- -273.15 Celsius to Kelvin
- -100 Celsius to Kelvin
- -40 Celsius to Kelvin
- 0 Celsius to Kelvin
- 10 Celsius to Kelvin
- 20 Celsius to Kelvin
- 25 Celsius to Kelvin
- 37 Celsius to Kelvin
- 50 Celsius to Kelvin
Other categories
- Time & date calculators
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- Tech & auto temperature guides
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