Unit Converter

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fahrenheit to celsius

Fahrenheit to Celsius

Convert °F to °C quickly, which is useful for weather, recipes and technical documentation of American origin, with the full formula °C = (°F − 32) × 5/9 shown next to the result.

The order of operations matters

The correct formula is °C = (°F − 32) × 5/9, and the order of operations matters: subtracting 32 first removes the offset between the two scales' zero points before applying the 5/9 span ratio. Reversing the order is the most common mistake: computing 100 °F × 5/9 − 32 gives 23.56 °C, a wrong value; the correct calculation, (100 − 32) × 5/9, gives 37.78 °C.
Fahrenheit remains the official everyday temperature scale only in the United States and a small group of territories that never adopted the International System of Units for daily use; the rest of the world switched to Celsius alongside metric adoption over the 20th century. That is why weather reports, recipes and technical manuals of American origin usually arrive in °F and need converting for an international reading.
In recipes, a 350 °F oven temperature converts exactly to 176.67 °C, but home ovens usually have dials in 5 or 25 °C increments, so the practical value most recipes use is 175 °C or 180 °C, not the raw number the formula produces. It's always worth checking whether the recipe already assumes that rounding before setting the oven to the exact converted figure.

°F → °C examples

Body temperature

Input: 98,6 °F
Expected output: 37 °C

Standard reference value used in the United States; the conversion lands right on 37 °C.

Freezing

Input: 32 °F
Expected output: 0 °C

Classic reference point, where both scales were originally anchored.

Recipe oven temperature

Input: 350 °F
Expected output: 176,67 °C

Exact converted value; most recipes round it to 175 °C or 180 °C to match the oven dial.

Full tool FAQ

Which unit categories does the tool convert?

There are fourteen categories: length, mass, temperature, data, time, speed, area, pressure, volume, energy, power, angle, frequency and fuel economy. Each one holds several units, from nanometer to nautical mile, from bit to exbibyte, from pascal to atmosphere, and conversion only happens between units of the same kind, because turning meters into seconds makes no sense.

Can I see the value in every unit at the same time?

Why is converting temperature different from converting length?

What is the difference between MB and MiB (decimal vs binary)?

Why are L/100 km and km/L not just a different factor?

Can I type the conversion instead of using the selectors?

Is the data I type sent to any server?

How do I control rounding and scientific notation?

Frequently asked questions

Why can't I multiply by 5/9 before subtracting 32?

Because the subtraction removes the offset between the scales' zero points; multiplying first applies the 5/9 ratio to a number that still includes that offset, producing a wrong result for any value other than -40.

Is 98.6 °F always equal to 37 °C?

Mathematically yes, but both numbers originate as approximations of the same measurement: 37 °C is the 19th-century average value for human body temperature, and 98.6 °F is simply its conversion, not an independent measurement.

Can I reverse the flow and convert Celsius to Fahrenheit?

Yes. The unit converter also lets you run the conversion in the opposite direction when needed; the dedicated Celsius-to-Fahrenheit page has the formula and examples for that other direction.

Next steps

From	To
-40 °F	-40 °C
-10 °F	-23.333333 °C
0 °F	-17.777778 °C
10 °F	-12.222222 °C
20 °F	-6.666667 °C
25 °F	-3.888889 °C
30 °F	-1.111111 °C
37 °F	2.777778 °C
100 °F	37.777778 °C

From

-40 °F

-40 °C

-10 °F

-23.333333 °C

0 °F

-17.777778 °C

10 °F

-12.222222 °C

20 °F

-6.666667 °C

25 °F

-3.888889 °C

30 °F

-1.111111 °C

37 °F

2.777778 °C

100 °F

37.777778 °C

The order of operations matters

The correct formula is °C = (°F − 32) × 5/9, and the order of operations matters: subtracting 32 first removes the offset between the two scales' zero points before applying the 5/9 span ratio. Reversing the order is the most common mistake: computing 100 °F × 5/9 − 32 gives 23.56 °C, a wrong value; the correct calculation, (100 − 32) × 5/9, gives 37.78 °C.

Fahrenheit remains the official everyday temperature scale only in the United States and a small group of territories that never adopted the International System of Units for daily use; the rest of the world switched to Celsius alongside metric adoption over the 20th century. That is why weather reports, recipes and technical manuals of American origin usually arrive in °F and need converting for an international reading.

In recipes, a 350 °F oven temperature converts exactly to 176.67 °C, but home ovens usually have dials in 5 or 25 °C increments, so the practical value most recipes use is 175 °C or 180 °C, not the raw number the formula produces. It's always worth checking whether the recipe already assumes that rounding before setting the oven to the exact converted figure.

°F → °C examples

Body temperature

Input: 98,6 °F
Expected output: 37 °C

Standard reference value used in the United States; the conversion lands right on 37 °C.

Freezing

Input: 32 °F
Expected output: 0 °C

Classic reference point, where both scales were originally anchored.

Recipe oven temperature

Input: 350 °F
Expected output: 176,67 °C

Exact converted value; most recipes round it to 175 °C or 180 °C to match the oven dial.

Full tool FAQ

Which unit categories does the tool convert?

Can I see the value in every unit at the same time?

Why is converting temperature different from converting length?

What is the difference between MB and MiB (decimal vs binary)?

Why are L/100 km and km/L not just a different factor?

Can I type the conversion instead of using the selectors?

Is the data I type sent to any server?

How do I control rounding and scientific notation?

Frequently asked questions

Why can't I multiply by 5/9 before subtracting 32?

Is 98.6 °F always equal to 37 °C?

Can I reverse the flow and convert Celsius to Fahrenheit?

Yes. The unit converter also lets you run the conversion in the opposite direction when needed; the dedicated Celsius-to-Fahrenheit page has the formula and examples for that other direction.