Convert temperature between Celsius, Fahrenheit, Kelvin, and Rankine instantly. Type in any unit and see all others.
Enter a temperature in any unit and instantly see the equivalent in Celsius, Fahrenheit, Kelvin, and Rankine — all at once. Unlike multiplicative unit conversions, temperature uses offset formulas, which this tool handles correctly for all combinations.
Enter a value in the number box and select the unit you're converting from. All other units update instantly in the cards below.
Most unit conversions are simple ratios. Temperature is not. Celsius and Fahrenheit do not share the same zero, so the conversion requires both multiplication and an offset. That is why people who are perfectly comfortable converting miles to kilometres still hesitate when a recipe says 350°F or a datasheet says an operating limit is 104°F.
This tool converts between Celsius, Fahrenheit, Kelvin, and Rankine in one step. Enter the value you have, keep the source scale clear, and read the others directly instead of relying on memory or half-remembered formulas.
Recipes are one of the most common sources of temperature conversion. A 350°F oven is about 175°C. If your oven dial moves in 5-degree steps, that is the level of rounding that matters; the formula is not.
A 95°F forecast can sound abstract if you think in Celsius. Once converted, it becomes obviously hot. The same applies in reverse if you are used to Fahrenheit and need to interpret a European forecast.
Kelvin matters because many formulas require absolute temperature, not just a relative scale. Using Celsius where Kelvin is required is a real calculation error, not a cosmetic one.
Storage, operating, and safety limits are often published in a different scale from the one your monitoring or interface uses. Converting them accurately once is better than constantly translating in your head.
These are useful as quick checks when a converted result looks suspicious.
This tool converts temperature scales only. It does not tell you cooking times, live weather conditions, wind chill, heat index, or energy transfer.
Absolute zero is the theoretical lowest possible temperature: 0 K = −273.15 °C = −459.67 °F. Nothing can be colder — it represents the complete absence of thermal energy.
Rankine is an absolute temperature scale like Kelvin, but based on Fahrenheit degrees. 0 °R = 0 K = absolute zero. It is used in some engineering fields in the United States.
This tool runs entirely in your browser. Nothing you type or paste is sent to any server — all processing happens locally on your device.