Temperature converter
Type a temperature and choose the scales. Fahrenheit to Celsius is subtract 32 and divide by 1.8; Celsius to Kelvin is add 273.15. The steps are written out with your number.
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- Sources checked Oct 2026
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The answer updates as you type.
1 degree Celsius =
33.8°F
Formula: °F = °C × 1.8 + 32
Show the steps
- Multiply by 1.8: 1 × 1.8 = 1.8
- Add 32: 1.8 + 32 = 33.8 °F
Definitions used: t/°C = T/K − 273.15; t/°C = (t/°F − 32) / 1.8.
Source: NIST SP 811, Appendix B.8, checked on .
Converting a whole column? Paste it all at once
Copy a column of degrees Celsius from Excel or Google Sheets, paste it on the left and copy the degrees Fahrenheit on the right back into your sheet. One result per line, in the same order.
5 values converted.
Pasted numbers like 1,234.5, 1.234,5 and 1 234,5 are read correctly whatever the option above; it only changes how the results are written. If you paste several columns, the first one is used. Everything runs in your browser; nothing you paste is sent anywhere.
1 degree Celsius in every temperature unit
| Unit | Value |
|---|---|
| Degrees Fahrenheit (°F) | 33.8 |
| Kelvins (K) | 274.15 |
The table follows the amount and the “From” unit you set in the converter above.
Popular temperature conversions
How each temperature unit is defined
These are the definitions the converter uses, as written in the source next to each one. Nothing is rounded before the calculation.
| Unit | Definition | Scale |
|---|---|---|
| Degree Celsius (°C) | t/°C = T/K − 273.15 | °C |
| Degree Fahrenheit (°F) | t/°C = (t/°F − 32) / 1.8 | °F |
| Kelvin (K) | T/K = t/°C + 273.15 | K |
Temperature conversion questions
Why is temperature not a simple multiplication?
Because the scales start at different zeros. 0 °C is 32 °F and 273.15 K, so you must shift the number as well as scale it.
What is absolute zero in each scale?
Absolute zero is 0 K, which is −273.15 °C and −459.67 °F.
Is it “degrees Kelvin”?
No. The unit is the kelvin, symbol K, without the word degree or the ° sign: water freezes at 273.15 K.
Can I convert a whole column of values at once?
Yes. Use the box under the converter: copy the column from Excel or Google Sheets, paste it on the left and copy the converted column from the right. Each result sits on the same line as its original value. A line that is not a number, such as a header, is left blank so the rows stay aligned. If you paste several columns, the first one is converted.
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Sources and limits
- NIST SP 811, Appendix B.8
NIST Special Publication 811, Guide for the Use of the SI, Appendix B.8: Factors for Units Listed Alphabetically (page updated August 18, 2025).
National Institute of Standards and Technology. Edition or effective date: . Text in force when checked on .
This is a calculation aid, not an official measurement service. Results are rounded to 6 significant digits for display. For trade, engineering, medical dosing or legal documents, confirm the figure in the official source. Nothing you type leaves your browser.