Kelvin converter essentials
Kelvin is the absolute temperature scale; 0 K is absolute zero. Celsius offsets Kelvin by 273.15, and Fahrenheit follows a 9/5 slope with a 32° intercept. This calculator keeps the absolute-zero guardrail while converting among all three.
How the conversion works
- T°C=TK−273.15
- T°F=(TK−273.15)timestfrac95+32
- TK=(T°F−32)timestfrac59+273.15
Units and conversions
| Unit | Symbol | Relation |
|---|
| Kelvin | K | base; absolute scale, minimum 0 |
| Celsius | °C | text°C=textK−273.15 |
| Fahrenheit | °F | text°F=(textK−273.15)times9/5+32 |
Worked examples
-
300 K → °C
300−273.15=26.85,°textC.
-
298.15 K → °F
(298.15−273.15)times9/5+32approx77.0,°textF.
-
20 °C → K
20+273.15=293.15,textK.
Tips and pitfalls
- Kelvin cannot be negative; inputs below 0 K are blocked.
- Use Kelvin in calculations, then express results in °C or °F for everyday communication.
- Keep two decimals for lab work; whole numbers are fine for weather and HVAC ranges.
References and further reading