Unit Converter
Convert length, weight, temperature, and all physical units
How to Convert Kelvin to Celsius
Convert scientific temperature data in Kelvin (K) to the more familiar Celsius (°C) scale by simply subtracting 273.15. This is one of the simplest temperature conversions. Useful when reading scientific papers, lab reports, or any data presented in absolute temperature.
Conversion Formula
°C = K − 273.15
Quick Reference Table
| Kelvin | Celsius |
|---|---|
| 0 | -273.15 |
| 233.15 | -40 |
| 273.15 | 0 |
| 293.15 | 20 |
| 298.15 | 25 |
| 310.15 | 37 |
| 373.15 | 100 |
How to Use the Unit Converter
The Internet Octopus Unit Converter supports 14 categories and over 100 units. Enter a value and select units to see instant conversion results.
Supported Unit Categories
- Length — Millimeter, centimeter, meter, kilometer, inch, foot, yard, mile, nautical mile, and more
- Weight / Mass — Milligram, gram, kilogram, ton, pound, ounce, stone, grain, and more
- Volume — Milliliter, liter, gallon, quart, pint, cup, fluid ounce, tablespoon, teaspoon, and more
- Area — Square meter, square kilometer, acre, hectare, pyeong, and more
- Temperature — Convert between Celsius, Fahrenheit, and Kelvin
- Speed — Meter/second, kilometer/hour, mile/hour, knot, foot/second, and more
- Time — Millisecond, second, minute, hour, day, week, year, and more
- Digital Storage — Bit, byte, KB, MB, GB, TB, PB, and KiB, MiB, GiB, TiB, and more
- Pressure — Pascal, kilopascal, bar, atmosphere, PSI, mmHg, and more
- Energy — Joule, kilojoule, calorie, kilocalorie, watt-hour, kilowatt-hour, BTU, electronvolt, and more
- Power — Watt, kilowatt, megawatt, horsepower, and more
- Angle — Degree, radian, gradian, turn, and more
- Force — Newton, kilonewton, pound-force, kilogram-force, and more
- Frequency — Hertz, kilohertz, megahertz, gigahertz, and more
How to Use
- Enter a number in the left input field.
- Select the source unit from the left dropdown.
- Select the target unit from the right dropdown — only compatible units are shown.
- The result appears instantly. Use the swap button to reverse the conversion.