Change degrees Fahrenheit to degrees Celsius as you type, with the working shown, a quick mental shortcut, oven temperatures and a chart of the temperatures people look up most. Type in the Celsius box to go the other way.
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Convert Fahrenheit to Celsius
70 °F = 21.11 °C
How 70 °F becomes 21.11 °C
Step 1: − 3270 − 32 = 38
Step 2: × 5 ÷ 938 × 5 ÷ 9 = 21.11 °C
Quick estimate(70 − 30) ÷ 2 = 20 °C
Nothing can be colder than absolute zero: −459.67 °F or −273.15 °C. Values below it are not accepted.
Quick Conversions
Fahrenheit to Celsius Formula
°C =(°F − 32) × 59
Subtract 32 from the Fahrenheit number
Multiply by 5, then divide by 9 (or divide by 1.8)
Example: 70 °F − 32 = 38, then 38 × 5 ÷ 9 = 21.11 °C
Same on both scales at −40: −40 °F = −40 °C
A Quick Mental Shortcut
Subtract 30 and halve it. It is close for everyday weather, and it is easy to do in your head.
Fahrenheit
Subtract 30, halve
Exact
Off by
50 °F
(50 − 30) ÷ 2 = 10 °C
10 °C
0 °C
60 °F
(60 − 30) ÷ 2 = 15 °C
15.56 °C
0.56 °C
70 °F
(70 − 30) ÷ 2 = 20 °C
21.11 °C
1.11 °C
80 °F
(80 − 30) ÷ 2 = 25 °C
26.67 °C
1.67 °C
90 °F
(90 − 30) ÷ 2 = 30 °C
32.22 °C
2.22 °C
100 °F
(100 − 30) ÷ 2 = 35 °C
37.78 °C
2.78 °C
The shortcut is exact at 50 °F and drifts lower as it gets hotter. Use the exact formula for cooking and science.
Fahrenheit to Celsius Chart
From −40 °F to 212 °F. Click a row to convert it.
Fahrenheit
Celsius
−40 °C
−28.89 °C
−17.78 °C
−12.22 °C
−6.67 °C
−1.11 °C
0 °C
4.44 °C
10 °C
15.56 °C
21.11 °C
26.67 °C
32.22 °C
37.78 °C
43.33 °C
48.89 °C
100 °C
°C = (°F − 32) × 5/9, rounded to 2 decimals. Use Print to print this page with the chart.
Most Searched Fahrenheit Values
The Fahrenheit temperatures people look up most, with the answer. Click one to use it.
Fahrenheit
Celsius
15.56 °C
26.67 °C
21.11 °C
37.78 °C
32.22 °C
23.89 °C
176.67 °C
43.33 °C
22.78 °C
4.44 °C
36.67 °C
10 °C
60, 80, 70 and 100 °F are the four most searched values. 350 °F is the most common oven setting.
Key Temperatures
The reference points everyone knows, in both scales.
Point
°F
°C
Absolute zero
−459.67
−273.15
Water freezes
32
0
Same on both scales
−40
−40
Body temperature (typical)
98.6
37
Water boils (sea level)
212
100
Water boils at 212 °F only at standard sea-level pressure.
Oven Temperatures in Celsius
US recipes are written in °F. Here is the Celsius setting for each. Click a row to convert it.
Fahrenheit
Celsius
121.11 °C
135 °C
148.89 °C
162.78 °C
176.67 °C
190.56 °C
204.44 °C
218.33 °C
232.22 °C
Recipes often round the Celsius setting, for example 350 °F to 175 °C or 180 °C. A fan (convection) oven may need about 20 °C less. Check your oven's manual.
Body Temperature: 97 °F to 100.4 °F in Celsius
Thermometer readings in tenths of a degree. Click a Fahrenheit value to use it.
Fahrenheit
Celsius
Fahrenheit
Celsius
36.11 °C
37.11 °C
36.17 °C
37.17 °C
36.22 °C
37.22 °C
36.28 °C
37.28 °C
36.33 °C
37.33 °C
36.39 °C
37.39 °C
36.44 °C
37.44 °C
36.5 °C
37.5 °C
36.56 °C
37.56 °C
36.61 °C
37.61 °C
36.67 °C
37.67 °C
36.72 °C
37.72 °C
36.78 °C
37.78 °C
36.83 °C
37.83 °C
36.89 °C
37.89 °C
36.94 °C
37.94 °C
37 °C
38 °C
37.06 °C
Rounded to 2 decimals. 98.6 °F is exactly 37 °C. A guide only, not medical advice.
Fahrenheit vs Celsius
Why you subtract 32 and multiply by 5/9.
Fahrenheit
Celsius
Water freezes
32 °F
0 °C
Water boils
212 °F
100 °C
Steps between them
180
100
One degree is
1 °F
0.56 °C
A Fahrenheit degree is smaller: 1 °F is a change of 5/9 °C (0.56 °C). The scales also start at different points, so you subtract 32.
Other Temperature Scales
🌡Temperature Converter, all four scales: Celsius, Fahrenheit, kelvin and Rankine, with oven temperatures and all 12 formulas.
To change Celsius to Fahrenheit here, type in the Celsius box.
About Fahrenheit to Celsius Conversion
Type a Fahrenheit temperature and the Celsius answer appears as you type, with the working and a mental shortcut. Use it for cooking, weather, travel, school and science. Your numbers never leave your browser. Use it for everyday sums, not as a medical or laboratory instrument.
Use this free Fahrenheit to Celsius converter to change a temperature from degrees Fahrenheit to degrees Celsius. Type a number in the Fahrenheit box and the Celsius answer appears as you type, with the working shown step by step and a quick estimate you can do in your head. You can also type in the Celsius box to go the other way. Pick how many decimals to round to and copy a link to your conversion. Tables list a chart from −40 °F to 212 °F, the Fahrenheit values people look up most, key temperatures, oven temperatures in Celsius, and body temperature in tenths of a degree. It is free and instant, and your numbers stay in your browser.
How to convert Fahrenheit to Celsius
Temperature scales do not start at the same point, so you cannot just multiply. You subtract 32 first, then multiply by 5/9 (that is dividing by 1.8).
°C = (°F − 32) × 5/9
For 70 °F: 70 − 32 = 38, and 38 × 5 ÷ 9 = 21.11 °C. For 32 °F, the freezing point of water: 32 − 32 = 0, so 0 °C. For 212 °F, the boiling point at sea level: 212 − 32 = 180, and 180 × 5 ÷ 9 = 100 °C.
A quick way without a calculator
Subtract 30 and halve it. For 70 °F that gives (70 − 30) ÷ 2 = 20 °C, close to the exact 21.11 °C. It is exact at 50 °F (10 °C) and drifts lower as it gets hotter: at 80 °F it gives 25 °C against an exact 26.67 °C, and at 100 °F it gives 35 °C against 37.78 °C. It is fine for judging the weather, but use the exact formula for cooking and science.
Common conversions
32 °F is 0 °C, 60 °F is 15.56 °C, 70 °F is 21.11 °C, 80 °F is 26.67 °C, 90 °F is 32.22 °C, 98.6 °F is 37 °C, 100 °F is 37.78 °C and 212 °F is 100 °C. The chart above lists more, from −40 °F to 212 °F, and the table of most searched values shows the ones people look up most.
Oven temperatures in Celsius
US recipes are written in Fahrenheit, so a recipe from abroad or an oven with a Celsius dial needs a conversion. 350 °F is 176.67 °C, which recipes usually round to 175 °C or 180 °C. 400 °F is 204.44 °C and 425 °F is 218.33 °C. A fan (convection) oven may need about 20 °C less, so check your oven's manual. The table above lists every setting from 250 °F to 450 °F.
Body temperature in tenths
Thermometers often show tenths of a degree. 98.6 °F is exactly 37 °C, 98.2 °F is 36.78 °C and 100.4 °F is 38 °C. The table above lists every tenth from 97 °F to 100.4 °F. It is a guide for converting a reading, not medical advice: if you are worried about a temperature, ask a doctor or nurse.
Room temperature
Room temperature is often quoted as about 68 to 72 °F, which is 20 to 22.22 °C. There is no single official figure, so use the value that your recipe, lab or instructions give.
Fahrenheit, Celsius and the spelling
The correct spellings are Fahrenheit and Celsius, after the two scientists who gave their names to the scales. Many people type "farenheit" or "celcius", and this page is for them too. A Fahrenheit degree is smaller than a Celsius degree: a change of 1 °F is a change of 5/9 °C, which is 0.56 °C. Water freezes at 32 °F and 0 °C and boils at 212 °F and 100 °C, which is 180 steps in Fahrenheit and 100 steps in Celsius.
Celsius to Fahrenheit
To go the other way, multiply by 9/5 and add 32: °F = °C × 9/5 + 32. You can do it here by typing in the Celsius box, or use the Celsius to Fahrenheit converter, which has its own chart. For all four scales, including kelvin and Rankine, use the Temperature Converter.
When the two scales are equal
At −40 the two scales show the same number: −40 °F is exactly −40 °C. It is the only point where they agree. Nothing can be colder than absolute zero, which is −459.67 °F or −273.15 °C, so the converter does not accept anything below it.
Subtract 32 from the Fahrenheit temperature, then multiply by 5/9 (or divide by 1.8). For example, (70 − 32) × 5/9 = 21.11 °C, and 212 °F is 100 °C.
What is the formula for Fahrenheit to Celsius?
°C = (°F − 32) × 5/9. To go the other way, °F = °C × 9/5 + 32. The 5/9 is the same as dividing by 1.8.
What is 70 °F in Celsius?
21.11 °C. The sum is 70 − 32 = 38, and 38 × 5 ÷ 9 = 21.11.
What is 100 °F in Celsius?
37.78 °C. The sum is 100 − 32 = 68, and 68 × 5 ÷ 9 = 37.78.
What is 98.6 °F in Celsius?
Exactly 37 °C, the usual figure for normal body temperature. The sum is 98.6 − 32 = 66.6, and 66.6 × 5 ÷ 9 = 37.
What is 350 °F in Celsius?
176.67 °C. The sum is 350 − 32 = 318, and 318 × 5 ÷ 9 = 176.67. Recipes usually round it to 175 °C or 180 °C, and a fan (convection) oven may need about 20 °C less.
What is 400 °F in Celsius?
204.44 °C. The sum is 400 − 32 = 368, and 368 × 5 ÷ 9 = 204.44. Recipes often round it to 200 °C.
What is 60 °F in Celsius?
15.56 °C. The sum is 60 − 32 = 28, and 28 × 5 ÷ 9 = 15.56.
What is 80 °F in Celsius?
26.67 °C. The sum is 80 − 32 = 48, and 48 × 5 ÷ 9 = 26.67.
How can I convert °F to °C in my head?
Subtract 30 and halve it. For 70 °F that gives 20 °C, close to the exact 21.11 °C. It is exact at 50 °F and gets less accurate as it gets hotter, so use the exact formula for cooking and science.
At what temperature are Fahrenheit and Celsius equal?
At −40. The temperature −40 °F is exactly the same as −40 °C.
What is room temperature in Celsius?
Room temperature is often quoted as about 68 to 72 °F, which is 20 to 22.22 °C. There is no single official figure, so use the value that your recipe, lab or instructions give.
Is it Fahrenheit or Farenheit? And Celsius or Celcius?
The correct spellings are Fahrenheit and Celsius. Many people type farenheit or celcius, and this converter is for them too.
Can I convert Celsius to Fahrenheit here?
Yes. Type the number in the Celsius box and the Fahrenheit box shows the answer. For 25 °C the sum is 25 × 9/5 + 32 = 77 °F. There is also a page just for Celsius to Fahrenheit.
What is absolute zero in Fahrenheit and Celsius?
−459.67 °F, which is −273.15 °C. Nothing can be colder, so the converter does not accept a lower value.
Are my numbers saved or shared?
No. The conversion happens in your browser, and the numbers you type are not stored or sent to any server. A link you copy keeps the numbers after the # sign, which browsers never send to a server.
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