Kelvin to Celsius Converter
Convert Kelvin to Celsius instantly. Free online K to °C calculator—subtract 273.15. For science reports and weather context.
How to Convert Kelvin to Celsius
To convert Kelvin to Celsius, subtract 273.15 from the Kelvin value.
Conversion Formula:
value - 273.15Conversion Examples
Example: 273.15 K to °C
- 273.15 − 273.15 = 0°C
273.15 K = 0°C
Water freezing.
Example: 300 K to °C
- 300 − 273.15 = 26.85°C
300 K ≈ 26.85°C
Warm room temperature.
Conversion Chart
| Kelvin | Celsius |
|---|---|
| 250 | -23.15 |
| 260 | -13.15 |
| 273.15 | 0 |
| 283.15 | 10 |
| 293.15 | 20 |
| 298.15 | 25 |
| 303.15 | 30 |
| 310.15 | 37 |
| 323.15 | 50 |
| 373.15 | 100 |
Conversion Formula
Kelvin and Celsius increments match, so converting only shifts the zero point. Subtracting 273.15 moves the value from the absolute scale back to the Celsius reference at water’s freezing point.
Quick Conversion Tip
Kelvin to Celsius is always “minus 273.15.” No scaling required.
Unit Definitions
Kelvin (K)
Absolute temperature scale starting at absolute zero (0 K).
To Celsius, subtract 273.15. To Fahrenheit, use (K − 273.15) × 9/5 + 32. To Rankine, multiply by 9/5.
Celsius (°C)
Metric temperature scale anchored to water phase changes.
Add 273.15 to reach Kelvin. Convert to Fahrenheit with (°C × 9/5) + 32 and to Rankine with (°C + 273.15) × 9/5.
Common Use Cases
- Lab data in Celsius for reports.
- Comparing SI temperatures to daily weather.
- Thermodynamics homework.
- Material property tables in °C.
Understanding the Conversion
Kelvin to Celsius: °C = K − 273.15. Same step size as Celsius; Kelvin starts at absolute zero.
273.15 K = 0°C.
Lab data in Celsius for reports. The table and FAQ on this page walk through the factor if you need it.
FAQs
How do I convert K to °C?
Subtract 273.15 from Kelvin.
Can Kelvin be negative?
No—0 K is absolute zero; Celsius can be negative.
What is 373.15 K in Celsius?
100°C (water boiling at 1 atm).