Celsius to Fahrenheit
°C to °F and back, for weather, fevers and oven dials.
How it works
- 01Type the temperature in degrees Celsius. Negative numbers are fine.
- 02Fahrenheit appears as you type. Type in the Fahrenheit box to go the other way.
- 03Use the chart for weather, body and oven temperatures, or switch to kelvin.
Questions
›What are some common Celsius to Fahrenheit conversions?
-40 °C = -40 °F, 0 °C = 32 °F, 15 °C = 59 °F, 30 °C = 86 °F, 100 °C = 212 °F and 220 °C = 428 °F.
›What is the formula?
Multiply by 1.8 (or 9/5) and add 32: °F = °C × 1.8 + 32. Going back, subtract 32 and divide by 1.8.
›Is there a quick mental shortcut?
Double the Celsius figure and add 30. It's exact at 10 °C and stays within about 3 degrees between 0 °C and 25 °C, but drifts further off at oven temperatures.
›What oven temperature is 180 °C?
180 °C is exactly 356 °F. Recipes usually round it to 350 °F, which is close enough for baking.
›Is my data uploaded anywhere?
No. This tool runs entirely in your browser, and Rounder never sends what you type or drop in to a server, ours or anyone else's. Once the page has loaded, along with any AI model the tool uses, it even works offline.
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