Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin instantly, with a quick-reference scale.
About Temperature Converter
A temperature converter settles quick questions about heat and cold across the three scales people actually encounter: Celsius, Fahrenheit, and Kelvin. Weather forecasts, oven settings, scientific reading, and international recipes each default to a different scale, and getting the number wrong can mean a ruined bake or a misleading experiment. This tool converts instantly in any direction, with a reference scale for context.
Conversions follow the standard linear formulas: Celsius to Fahrenheit is C times 9/5 plus 32, Fahrenheit to Celsius is (F minus 32) times 5/9, and either converts to Kelvin by adding or subtracting 273.15. All three scales share the same degree spacing, so the math is exact rather than approximate. Negative values convert correctly, and the Kelvin edge case is handled, since nothing can go below absolute zero at 0 K or -273.15 degrees Celsius.
Bakers and cooks converting oven temperatures between recipes, travelers adjusting to local forecasts, and students checking physics and chemistry homework all reach for it. Scientists and engineers double-checking unit conversions before recording data will appreciate that Kelvin, the scientific standard, is included. It also makes quick sanity checks easy, such as confirming that water boils at 212 degrees Fahrenheit, 100 degrees Celsius, or 373.15 K.
How to Use
- Enter a temperature value.
- Select the from and to scales.
- Read the converted temperature immediately.
Example
100°C 212°F / 373.15 K
Water boils at 100°C, which is 212°F and 373.15 K. The conversion formulas are C×9/5+32 for Fahrenheit and C+273.15 for Kelvin.
FAQ
Which temperature scales are supported?
Celsius, Fahrenheit, and Kelvin — the three scales used in science, weather, and cooking around the world.
Can negative temperatures be converted?
Yes, negative values are fully supported. Kelvin cannot go below absolute zero (0 K = -273.15°C), and the tool flags that edge case.
What is the quick mental rule for F to C?
Subtract 32, then multiply by 5/9. For example (77-32)×5/9 = 25°C. This converter does it precisely for you.
Why is the Fahrenheit scale so different from Celsius?
Fahrenheit was designed around everyday human-relevant temperatures, with 32°F as the freezing point and 212°F as the boiling point of water, giving finer resolution for weather temperatures.
At what temperature are Celsius and Fahrenheit equal?
At -40 degrees. The scales coincide at -40°C = -40°F, the only temperature where the two readings are the same number.