Celsius
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Celsius to Fahrenheit Calculator
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Formula: °F = (°C × 9/5) + 32
Converted °F
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°FOffset +32
Multiplier
9/5
Fahrenheit
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Offset
+32
How this Celsius to Fahrenheit calculator works
Enter a temperature in degrees Celsius. The tool multiplies it by 9/5 and then adds 32.
°F = (°C × 9/5) + 32. A room temperature of 25°C becomes 77°F. The result is shown to at most six decimal places.
Celsius to Fahrenheit examples
Each row uses the same formula as the calculator.
| Celsius (°C) | Fahrenheit (°F) |
|---|---|
| 0 | 32 |
| 25 | 77 |
| 37 | 98.6 |
| 100 | 212 |
| −10 | 14 |
| −40 | −40 |
How to read the result
Multiply by 9/5
A Celsius degree is larger than a Fahrenheit degree. The 9/5 factor stretches the scale.
Add 32
Fahrenheit places water’s freezing point at 32, so every conversion adds that offset.
Negative values
Temperatures below 0°C are allowed. −10°C converts to 14°F.
The circle
The ring fills at 50°C using the absolute value. The Fahrenheit number is not limited by that scale.
Frequently asked questions
How do you convert Celsius to Fahrenheit?
°F = (°C × 9/5) + 32. Multiply the Celsius temperature by 9, divide by 5, then add 32. 25°C is 25 × 9/5 = 45, plus 32, which is 77°F.
What is 0°C in Fahrenheit?
0 × 9/5 + 32 = 32. Water freezes at 0°C, which is 32°F.
What is 100°C in Fahrenheit?
100 × 9/5 + 32 = 180 + 32 = 212. Water boils at 100°C, which is 212°F at standard atmospheric pressure.
Why is −40 the same on both scales?
−40 × 9/5 + 32 = −72 + 32 = −40. That is the only temperature where the Celsius and Fahrenheit numbers match.
Can I enter a negative Celsius temperature?
Yes. Any real number is valid, including values below zero. −10°C is −10 × 9/5 + 32 = 14°F.
Why does the circle stop at 50°C?
The ring is a visual scale filled at 50°C, using the absolute value of the temperature. The Fahrenheit result itself is not capped.