Celsius to Fahrenheit
This free Celsius to Fahrenheit converter translates weather forecasts, oven dials, fever readings and thermostat settings between the two temperature scales people actually argue about.
How to use
- Type a temperature in degrees Celsius into the Value box.
- The Fahrenheit equivalent appears instantly as you type.
- Swap the From and To selects to convert Fahrenheit back to Celsius.
- Copy the full equation shown under the result into your notes or recipe.
Frequently asked questions
What is the formula for Celsius to Fahrenheit?
°F = °C × 9/5 + 32. For example, 37 °C × 9/5 + 32 = 98.6 °F. The +32 accounts for Fahrenheit’s lower zero point, which is why a plain multiplication factor would give wrong answers.
At what temperature are Celsius and Fahrenheit equal?
At exactly −40 degrees: −40 °C and −40 °F are the same temperature, because −40 × 9/5 + 32 = −40. It is the single point where the two scales cross.
What are the key reference points to remember?
0 °C = 32 °F (water freezes), 37 °C = 98.6 °F (body temperature), 100 °C = 212 °F (water boils at sea level), and room temperature 20 °C = 68 °F. With these four anchors most everyday conversions can be sanity-checked instantly.
Do you store the temperatures I convert?
No. The conversion runs entirely in your browser and nothing is uploaded, stored or logged. Close the page and nothing remains.
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About this tool
This free Celsius to Fahrenheit converter translates weather forecasts, oven dials, fever readings and thermostat settings between the two temperature scales people actually argue about. Temperature is not a simple ratio: the scales have different zero points, so multiplying by a factor alone would be wrong. The conversion uses the real offset formula — °F = °C × 9/5 + 32 — and the page applies it faithfully, so 0 °C becomes 32 °F, 37 °C becomes 98.6 °F, and 100 °C becomes exactly 212 °F. Results appear on every keystroke, and the full equation is printed beneath each result for quoting in recipes, lab notes or schoolwork. Anchors worth knowing by heart: −40 is the point where both scales agree, 20 °C is a comfortable 68 °F, 22–24 °C is the 72–75 °F range most offices keep, and an oven at 180 °C is the classic 356 °F that American recipes call "moderate". Negative temperatures, decimals and large values all work the same way. As with every tool on this site, the computation runs entirely in your browser: temperatures you type — including health-related readings — are never uploaded, stored or logged. To convert the other direction, swap the From and To selects and the page becomes Fahrenheit to Celsius in one click.