Temperature converters
Celsius, Fahrenheit, Kelvin, and Rankine — the temperature scales you’ll meet in cooking, weather, science, and engineering.
4 units12 conversions
Temperature›°C → °F
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1 °C=
33.8°F
formula1 °C = 33.8 °F
Popular in temperature
Celsius to Fahrenheit
1 °C = 33.8 °F
Fahrenheit to Celsius
1 °F = -17.2222 °C
Celsius to Kelvin
1 °C = 274.15 K
Kelvin to Celsius
1 K = -272.15 °C
Celsius to Rankine
1 °C = 493.47 °R
Fahrenheit to Kelvin
1 °F = 255.928 K
Fahrenheit to Rankine
1 °F = 460.67 °R
Kelvin to Fahrenheit
1 K = -457.87 °F
Kelvin to Rankine
1 K = 1.8 °R
Rankine to Celsius
1 °R = -272.594 °C
All temperature conversions
12 pairsEvery unit pair in this category. Tap any cell to open that conversion.
Each cell shows what 1 of the row unit equals in the column unit (these units don’t share a flat multiplier).
About temperature units
The scales
Celsius (°C)
Water freezes at 0°C and boils at 100°C. The everyday scale almost everywhere outside the US.
Fahrenheit (°F)
Water freezes at 32°F and boils at 212°F. Still the everyday US scale — tuned so 0–100°F roughly spans the outdoor temperatures humans encounter.
Kelvin (K)
The SI scale. Same size degree as Celsius, but offset so 0 K is absolute zero (−273.15°C). Used in science.
Rankine (°R)
Absolute zero like Kelvin, but with Fahrenheit-sized degrees. Used in some US engineering and thermodynamics.
Quick mental conversions
To go from Celsius to Fahrenheit: double it and add 30 (close enough for weather). To go from Fahrenheit to Celsius: subtract 30 and halve it. For exact: F = C × 9/5 + 32.
Frequently asked
What temperature is the same in Celsius and Fahrenheit?
−40°. It’s the one place the two scales cross.
Is room temperature 20°C or 70°F?
Both, roughly. 20°C is 68°F; 22°C is 71.6°F. "Room temperature" usually means somewhere in that band.
Why does the Kelvin scale not use degree symbols?
By international convention. We say "300 kelvin," not "300 degrees Kelvin."
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