Celsius to Fahrenheit Converter (°C to °F)
Convert temperatures between Celsius and Fahrenheit in either direction with the standard linear temperature formulas.
How it works
Fahrenheit = Celsius × 9/5 + 32. Reverse with Celsius = (Fahrenheit − 32) × 5/9.
Formula / calculation method
°F = (°C × 9/5) + 32°C = (°F − 32) × 5/9
Worked examples
- 0°C equals 32°F.
- 100°C equals 212°F, while 20°C equals 68°F.
When this tool helps
Useful for weather, cooking, travel, appliance settings, science references, medical/environmental readings, and international instructions.
Related calculations: kilograms to pounds, centimeters to inches, and kilometers to miles.
Browse this topic: Speed, Temperature & Area Converters · Speed, Temperature & Area Guide.
Quick reference
| Input | Result |
|---|---|
| 0°C | 32°F |
| 20°C | 68°F |
| 100°C | 212°F |
Accuracy and definitions
This is a direct scale conversion. Negative temperatures are valid, including −40 where Celsius and Fahrenheit are numerically equal.
Reference standards
Where a published measurement definition applies, Solveberry links to primary standards rather than relying only on secondary converter sites.
- NIST Guide to the SI — Appendix B.9 temperature conversions
- BIPM SI Brochure — International System of Units
Methodology & verification
- Method
- Fahrenheit = Celsius × 9/5 + 32. Reverse with Celsius = (Fahrenheit − 32) × 5/9.
- Verification
- The displayed formula is cross-checked against Solveberry regression cases before release. Calculator inputs and results stay in the browser.
- Last reviewed
- 2026-08-19
Results are calculated locally in your browser. Optional analytics do not include calculator input values or results.
Common questions
At what temperature are Celsius and Fahrenheit equal?
−40°C equals −40°F.
Can I enter negative temperatures?
Yes. Negative Celsius and Fahrenheit values are mathematically valid and supported.
Can I convert in the opposite direction on this page?
Yes. Use the “Convert from” selector or Swap units button; Solveberry keeps both directions on one canonical page.
Why can my result differ slightly from another converter?
Differences usually come from rounding or from selecting a different regional measurement standard. Solveberry shows the factor or standard used on the page.