Fahrenheit to Celsius Converter

Common f to c conversions

How this conversion works

°C = (°F - 32) × 5/9. Subtract 32 from Fahrenheit, then multiply by 5/9.

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What you are converting

Fahrenheit

A temperature scale where water freezes at 32 degrees and boils at 212 degrees at sea level. It is the everyday scale for weather reports and household thermostats in the United States.

Celsius

A temperature scale where water freezes at 0 degrees and boils at 100 degrees at sea level. It is the standard scale for weather forecasts, ovens, and medical thermometers in most countries.

Why convert and when you would use this

Travelers checking a US weather forecast need Fahrenheit converted to Celsius to decide what to wear abroad. Cooks following American recipes must convert oven temperatures because most ovens outside the United States display Celsius. The same applies when comparing body temperature readings from thermometers sold in different regions.

Worked example

Convert 68 degrees Fahrenheit using the formula: subtract 32 to get 36, then multiply by 5/9. That is 36 multiplied by 5, which equals 180, divided by 9 gives 20. Therefore 68 F converts to exactly 20 C, which matches a typical comfortable room temperature on a thermostat.

Rounding and accuracy

Round results to one decimal place for weather forecasts, body temperature, and cooking temperatures, since that precision is enough for practical decisions. Use whole numbers for quick mental checks such as thermostat settings. Keep two decimal places only for laboratory, engineering, or scientific work where small differences matter.

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