Converters
Temperature Converter
Instantly convert between Celsius, Fahrenheit and Kelvin.
Celsius
—
°C
Fahrenheit
—
°F
Kelvin
—
K
Type a temperature to see all three scales instantly.
What is the Temperature Converter?
The world cannot agree on temperature: most countries use Celsius, the US uses Fahrenheit, and scientists use Kelvin. This free temperature converter takes a value in any of the three scales and instantly shows all three side by side, with an absolute-zero sanity check so typos get flagged instead of silently converted.
How to use it
- Type the temperature value.
- Select the scale it is in — Celsius, Fahrenheit or Kelvin.
- All three converted values appear immediately in the result cards.
Key features
- Instant three-way conversion with no button clicks.
- Celsius, Fahrenheit and Kelvin in one view.
- Absolute-zero warning catches impossible inputs.
- Clean rounding to two decimal places.
- Runs entirely in your browser.
Real-world use cases
- Reading American recipes that list oven temperatures in Fahrenheit.
- Understanding weather reports when travelling to the US.
- Converting lab measurements to Kelvin for physics and chemistry work.
- Setting air-conditioner or heater targets from foreign manuals.
Practical tips
- Quick mental check: 20°C ≈ 68°F (room temperature), 37°C ≈ 98.6°F (body temperature).
- Oven conversions: 180°C ≈ 350°F, 200°C ≈ 400°F — the most common baking marks.
- Kelvin never takes a degree symbol — write 273 K, not 273°K.
- For weather, whole degrees are plenty; decimals matter mainly in science.
Frequently Asked Questions
What is the formula for Celsius to Fahrenheit?
°F = °C × 9/5 + 32. So 25°C becomes 77°F. To go back: °C = (°F − 32) × 5/9.
What is Kelvin used for?
Kelvin is the absolute temperature scale used in science. It starts at absolute zero, so there are no negative values — handy for physics and chemistry formulas.
Why does it warn about absolute zero?
Nothing can be colder than absolute zero, so a value below that limit means a typo or a wrong unit selection. The warning helps you catch the mistake immediately.
Is 0°C the same as 32°F?
Yes — both are the freezing point of water. The boiling point is 100°C, which equals 212°F at sea level.
How precise are the results?
Results show up to two decimal places, which is more than enough for cooking, weather and travel. The underlying math uses full floating-point precision.