Temperature converter
Kelvin to Celsius Converter
Convert K to °C or reverse with one click. Type a value below for an instant result.
Kelvin K
Celsius °C
K → °C · runs in your browser, no server
How to convert kelvin to celsius
Kelvin (K) and Celsius (°C) both measure temperature. Whether you are studying, traveling, cooking, or working on a project, converting between them should be fast and accurate.
Looking for the opposite direction? See our dedicated celsius to kelvin converter — same formula reversed, with content written for that direction.
The standard relationship used on this page means that 1 kelvin equals -272.15 °C. Enter any number in the calculator — use the swap button to reverse the direction without leaving the page.
Converting 300 K gives 26.85 °C. This is a practical reference when switching between kelvin and celsius for weather forecasts, cooking, science labs, and HVAC settings.
Need celsius to kelvin instead? Try our Celsius to Kelvin converter. celsius → kelvin
When you'll use this
- Converting a scientific instrument's Kelvin readout into the everyday Celsius scale for a lab report
- Understanding an astronomy article's Kelvin-stated star or planet surface temperature in familiar Celsius terms
- Converting a materials science spec (melting point given in Kelvin) into Celsius for practical engineering use
- Checking a physics homework answer given in Kelvin against an expected everyday Celsius temperature
- Converting cryogenic or superconductor research temperatures (often near absolute zero, in Kelvin) into Celsius for general audiences
Practical note
Kelvin appears constantly in science writing because it is the SI base unit for temperature, but most readers think in Celsius — this page bridges the gap. A star described as having a surface temperature of 5,778 K (roughly the Sun's) converts to about 5,505°C, a number far easier to compare against everyday experience than the raw Kelvin figure. One common point of confusion worth flagging: camera and lighting "color temperature," also measured in Kelvin (daylight bulbs around 5600 K, warm indoor bulbs around 2700 K), describes light color, not thermodynamic heat, and converting it to Celsius would be meaningless — this page is for actual thermodynamic temperature conversions only.
Tips
- Subtract 273.15 from Kelvin to get Celsius — the reverse of the Celsius-to-Kelvin formula, and just as simple since it is pure subtraction.
- Absolute zero is 0 K, which converts to -273.15°C — the coldest temperature theoretically possible, useful context when a Kelvin figure looks unfamiliar.
- Don't confuse thermodynamic Kelvin with photography and lighting "color temperature" in Kelvin (like a 5600 K daylight bulb) — that is a different concept entirely and is not meant to be converted to Celsius on this page.
K to °C conversion table
| K | °C |
|---|---|
| 268 | -5.15 |
| 273 | -0.15 |
| 283 | 9.85 |
| 288 | 14.85 |
| 293 | 19.85 |
| 298 | 24.85 |
| 303 | 29.85 |
°C to K conversion table
Or click the swap button in the converter to switch from °C to K.
| °C | K |
|---|---|
| -5 | 268.15 |
| 0 | 273.15 |
| 10 | 283.15 |
| 15 | 288.15 |
| 20 | 293.15 |
| 25 | 298.15 |
| 30 | 303.15 |
Frequently asked questions
How many celsiuss are in 1 kelvin? +
One kelvin equals -272.15 °C. Use the converter above for any value — results are calculated locally with full precision.
How do I convert K to °C? +
Use the formula: °C = K − 273.15. Enter your value in the calculator and the result appears instantly. Click the swap button to convert °C back to K.
How many kelvins are in 1 celsius? +
One celsius equals 274.15 K. Swap the converter direction to work backwards from °C to K.
What is 10 K in °C? +
10 K is -263.15 °C. See the conversion table on this page for more common values.
When would I convert kelvin to celsius? +
This conversion is useful for weather forecasts, cooking, science labs, and HVAC settings. ConvertHub runs entirely in your browser — no data is uploaded to any server.
Is kelvin to celsius the same as celsius to kelvin? +
They are inverse operations. This page focuses on K → °C with examples and tables for that direction. For °C → K, use our separate celsius to kelvin converter page.