Instant conversion
Celsius To Kelvin Converter
Kelvin = celsius + 273.15. Add 273.15 to the celsius value.
What does this tool do?
Celsius To Kelvin Converter computes the result directly in your browser — Kelvin = celsius + 273.15. Add 273.15 to the celsius value. Nothing you enter is uploaded or stored.
- Kelvin = celsius + 273.15. Add 273.15 to the celsius value.
- Celsius sets 0 at water's freezing point and 100 at boiling. Real-world anchor: room temperature is about 22 C.
Common C to K conversions
| C | K |
|---|---|
| 0 | 273.15 |
| 10 | 283.15 |
| 20 | 293.15 |
| 30 | 303.15 |
| 40 | 313.15 |
| 50 | 323.15 |
| 60 | 333.15 |
| 70 | 343.15 |
| 80 | 353.15 |
| 90 | 363.15 |
| 100 | 373.15 |
| 200 | 473.15 |
How this conversion works
Kelvin = celsius + 273.15. Add 273.15 to the celsius value.
Privacy: Conversions run in this browser. Nothing you type is uploaded.
Why this conversion is exact
Temperature conversions are exact formulas rather than multiplication factors, because the scales differ in both zero point and degree size. The converter applies the exact formula; the reference table gives commonly checked values so you can sanity-check any result instantly.
Rounding is display-only. The converter keeps full precision internally, so chained conversions (this unit to another and back) return to the starting value without drift, which hand-rounded tables cannot promise.
What you are converting
Celsius
Celsius sets 0 at water's freezing point and 100 at boiling. Real-world anchor: room temperature is about 22 C.
Kelvin
Kelvin is the SI temperature scale starting at absolute zero. Real-world anchor: room temperature is about 295 K.
Why convert and when you would use this
Reverse science conversion for lab work and engineering.
Worked example
Worked example: 25 C + 273.15 = 298.15 K.
Rounding and accuracy
Use 2-4 decimal places for everyday tasks; keep more for engineering or lab precision.
Frequently asked questions
How do you convert C to K?
Kelvin = celsius + 273.15. Add 273.15 to the celsius value.
What is the formula for C to K?
Kelvin = celsius + 273.15. Add 273.15 to the celsius value.
Why is this conversion not a simple multiplication?
Kelvin and Celsius share the same degree size but shift by 273.15, so the conversion adds or subtracts a constant.