Fahrenheit to Celsius

Last updated: July 2026

Convert Fahrenheit to Celsius (°F to °C)

If you're reading a weather report, product spec, or recipe from outside the United States, you'll often run into Fahrenheit and need it converted to the global standard, Celsius. Our calculator gives you the exact number instantly, and also converts to and from Kelvin if you need it for scientific work.

The Formula, Explained Simply

To convert Fahrenheit to Celsius, subtract 32 from the Fahrenheit value, then multiply by 5/9:

°C = (°F − 32) × 5/9

You subtract 32 first because the two scales don't share the same zero point — 32°F (freezing) lines up with 0°C. The 5/9 factor accounts for Fahrenheit dividing the same temperature range into more, smaller degrees than Celsius does.

A Worked Example

Say your oven thermometer reads 350°F and you need it in Celsius:

• 350 − 32 = 318
• 318 × 5/9 = 176.7°C

And for a hot summer day at 90°F:

• 90 − 32 = 58
• 58 × 5/9 = 32.2°C

Mental Math Trick

Want a quick way to estimate the conversion in your head? Subtract 30 from the Fahrenheit temperature, then divide by 2. It won't be perfect — the true multiplier is 5/9 (about 0.556), not 0.5 — but it's a fast, close approximation for everyday use. For exact numbers, use the calculator above. Need to go the other direction? Try our Celsius to Fahrenheit converter.