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Celsius to Fahrenheit Converter

Convert Celsius to Fahrenheit and Fahrenheit to Celsius instantly. Bidirectional temperature converter with formula and common values.

°C

Fahrenheit

77

°F

25 °C = 77 °F

°F = °C × 9/5 + 32

Celsius to Fahrenheit: To convert celsius to fahrenheit, apply °F = °C × 9/5 + 32. Unlike linear unit conversions, celsius and fahrenheit use different zero points, so a fixed multiplier is not sufficient.

How to Convert Celsius to Fahrenheit

Converting between celsius and fahrenheit requires both a scale factor and an offset because the two scales use different zero points. The formula below handles both adjustments.

Conversion Formula

  • Celsius to Fahrenheit: °F = °C × 9/5 + 32
  • Fahrenheit to Celsius: °C = (°F − 32) × 5/9

Celsius to Fahrenheit Conversion Chart

Celsius (°C)Fahrenheit (°F)
0.132.18
0.2532.45
0.532.9
133.8
235.6
337.4
541
1050
2068
2577
50122
100212
250482
10001832

Understanding the Units

What is a Celsiu?

The degree Celsius is a derived SI unit of temperature where 0 °C corresponds to the freezing point of water and 100 °C to the boiling point at standard atmospheric pressure.

Named after Anders Celsius (1701–1744), Swedish astronomer who proposed the original scale in 1742.

Common contexts: weather, cooking, science.

What is a Fahrenheit?

The degree Fahrenheit is a temperature scale on which water freezes at 32 °F and boils at 212 °F at standard atmospheric pressure.

Named after Daniel Gabriel Fahrenheit (1686–1736), German-Polish physicist who developed the mercury thermometer.

Common contexts: US weather, US cooking.

Real-World Reference Points

Item Celsius (°C) Fahrenheit (°F)
Water freezing point032
Comfortable room2169.8
Human body temperature3798.6
Water boiling point100212

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FAQ

How do I convert Celsius to Fahrenheit?

Multiply the Celsius value by 9/5 (or 1.8), then add 32. For example, 25°C: (25 × 9/5) + 32 = 77°F.

Why does the US still use Fahrenheit?

The US adopted the Fahrenheit scale before the metric system gained global traction. Switching would require updating infrastructure, weather reporting, and public education, so Fahrenheit remains the standard for everyday use.

At what temperature are Celsius and Fahrenheit equal?

Both scales read the same at -40 degrees. So -40°C = -40°F exactly.

What is room temperature in Fahrenheit?

Room temperature is generally considered 20-22°C, which equals 68-71.6°F.

How do you convert celsius to fahrenheit?

Apply the formula °F = °C × 9/5 + 32. For example, celsius of 0 corresponds to 32 fahrenheit.

How do you convert fahrenheit back to celsius?

Use the inverse formula: °C = (°F − 32) × 5/9.

Why isn't celsius-to-fahrenheit a simple multiplication?

Celsius and Fahrenheit use different zero points, so the relationship includes both a scale factor and an offset. The scale factor alone gives the rate of change but not the absolute value.

What is the difference between Celsiu and Fahrenheit?

The degree Celsius is a derived SI unit of temperature where 0 °C corresponds to the freezing point of water and 100 °C to the boiling point at standard atmospheric pressure. The degree Fahrenheit is a temperature scale on which water freezes at 32 °F and boils at 212 °F at standard atmospheric pressure.