80°F to Celsius

26.7°C

80°F = 26.7°C = 299.82 K

Working: (80 − 32) × 5/9 = 26.7

80 degrees Fahrenheit converts to 26.7 degrees Celsius.

To convert Fahrenheit to Celsius, subtract 32 first, then multiply by 5/9. For 80°F: 80 − 32 = 48, and 48 × 5/9 = 26.7. The subtraction comes first because the two scales have different zero points — water freezes at 0°C but at 32°F.

A quick mental estimate is to subtract 30 and halve the result, which gives about 25°C — 1.7 degrees off the exact 26.7°C. That is close enough to judge the weather, though it drifts badly at oven temperatures.

Eighty degrees is a warm summer day in the United States and the point at which air conditioning generally comes on. It converts to 26.7°C, which sits just above the range most people find comfortable indoors without cooling.

Nearby temperatures

Fahrenheit	Celsius
60°F	15.6°C
68°F	20°C
72°F	22.2°C
90°F	32.2°C
98°F	36.7°C
100°F	37.8°C
101°F	38.3°C
103°F	39.4°C

Try another value

From

°C

77°F

All scales

Celsius (°C)25 °C

Fahrenheit (°F)77 °F

Kelvin (K)298.15 K

Frequently asked questions

What is 80 degrees Fahrenheit in Celsius?

80°F is 26.7°C. Subtract 32 from 80 to get 48, then multiply by 5/9 to get 26.7.

What is the formula for Fahrenheit to Celsius?

°C = (°F − 32) × 5/9. Subtract 32 from the Fahrenheit temperature, then multiply the result by 5/9 (about 0.5556).

For any other value, use the full Temperature Converter on BrainVert.