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Temperature Converter
Convert temperatures between Celsius, Fahrenheit, and Kelvin with live updates and helpful reference formulas.
temperature convertercelsius to fahrenheitfahrenheit to celsiuskelvin converter30 celsius to fahrenheit
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Formula
°F = (°C × 9 / 5) + 32 · K = °C + 273.15
Type in any field to update the other temperature units instantly.
Quick reference
Common conversions| Reference point | °C | °F | K |
|---|---|---|---|
| Absolute zero | -273.15 | -459.67 | 0 |
| Water freezes | 0 | 32 | 273.15 |
| Body temperature | 37 | 98.6 | 310.15 |
| Water boils | 100 | 212 | 373.15 |
| -40 crossover | -40 | -40 | 233.15 |
How to use
How to convert Celsius, Fahrenheit, and Kelvin instantly
- 1 Type a value into the Celsius, Fahrenheit, or Kelvin field depending on the unit you want to start from.
- 2 Watch the other two temperature fields update immediately as you type so you can compare units in real time.
- 3 Use the formula panel to confirm the exact equation being applied to the active conversion.
- 4 Check the quick-reference table for common points such as freezing, boiling, body temperature, and absolute zero.
- 5 Clear the values when you want to start another conversion or compare a new temperature range.
A temperature converter is useful across science, cooking, weather, travel, and engineering because Celsius, Fahrenheit, and Kelvin appear in different contexts. Real-time updates make the conversion faster than using a calculator repeatedly, especially when you are comparing several values or checking a reference quickly while working.
Showing the formulas alongside the numbers is helpful for students and anyone reviewing how the units relate to one another. The quick-reference table also makes the tool practical for common checkpoints like freezing point, boiling point, and normal body temperature. Because the converter runs entirely in the browser, it stays fast and easy to use on any device.
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