How to convert celsius to fahrenheit
Multiply °C by 9/5, then add 32 to convert to °F (or subtract 32 from °F, then multiply by 5/9 to get °C).
Conversion formula
How to use this formula
- Start from the temperature you have in celsius (the scale you are converting from).
- Apply the steps in the left column: temperature needs both a multiply and an offset—there is no single “conversion factor” like lengths or weights.
- The result is in fahrenheit. Verify with the calculator above; the inverse formula is on this page if you need to go the other way.
Why this works
The scales use different zero points and step sizes, so you need both a multiply (9/5) and an offset (+32), not a single ratio.
Example: for 20 celsius: result ≈ 68.0 fahrenheit (rounded as shown on this site).
Practical context
Celsius to Fahrenheit is used for weather forecasts, oven settings when a recipe lists °C, and travel between countries that display different scales.
Body temperature and lab safety sheets also mix both units.
Weather and cooking crossovers like 1 celsius to fahrenheit or 100 celsius to fahrenheit °C are where people most often sanity-check °F equivalents.
About celsius and fahrenheit
Celsius is an SI-derived scale with 0 °C at water’s freezing point and 100 °C at sea-level boiling. Fahrenheit is common in the US for weather and ovens. Convert with °F = (°C × 9/5) + 32.
Related converters
FAQ
- What is 20°C in fahrenheit?
- 20 °C is about 68.0 °F. You use °F = (°C × 9/5) + 32 because the two scales use different zero points and step sizes.
- How do you convert between celsius and fahrenheit?
- Use the formulas on this page (°F = (°C × 9/5) + 32). Unlike lengths or weights, temperature needs both a multiply and an offset—the two scales don’t line up with a single ratio.
- Why is temperature conversion not a single multiply or divide?
- The scales use different zero points and step sizes, so you need both a multiply (9/5) and an offset (+32), not a single ratio. That’s why you always see two steps in the formulas, not just “times a number.”
- Is 20° a typical everyday temperature?
- That’s cool to comfortable room-adjacent weather—common indoors or in mild outdoor seasons.