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Celsius to Fahrenheit Converter

Convert between Celsius, Fahrenheit, and Kelvin temperature units

Input Temperature

Enter a temperature and select units to convert

Temperature Category
Warm

Quick Conversions

Common Temperatures

Absolute Zero
Coldest possible temperature
Water Freezes
32°F / 273.15K
Room Temperature
68°F / 293.15K
Body Temperature
98.6°F / 310.15K
Water Boils
212°F / 373.15K

Conversion Result

25 °C =
77
Fahrenheit

All Conversions

25 °C equals:

Celsius25 °C
Fahrenheit77 °F
Kelvin298.15 K

Weather Temperatures

Click to convert common weather temps

Extreme Cold-40°C / -40°F
Freezing0°C / 32°F
Cold Day5°C / 41°F
Cool Day15°C / 59°F
Mild Day20°C / 68°F
Warm Day25°C / 77°F
Hot Day35°C / 95°F
Extreme Heat45°C / 113°F

Cooking Temperatures

Common oven temperatures

Low Oven150°C / 302°F
Moderate Oven180°C / 356°F
Hot Oven200°C / 392°F
Very Hot Oven230°C / 446°F

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About Temperature Conversion

Understanding Temperature Scales

This converter helps you convert between the three main temperature scales: Celsius (°C), Fahrenheit (°F), and Kelvin (K). Each scale has different reference points and is used in different contexts around the world.

Temperature Scales

  • Celsius (°C): Used worldwide, water freezes at 0°C and boils at 100°C
  • Fahrenheit (°F): Used in the US, water freezes at 32°F and boils at 212°F
  • Kelvin (K): Scientific scale, absolute zero is 0K, no negative values

Conversion Formulas

Celsius to Fahrenheit:
°F = (°C × 9/5) + 32
Fahrenheit to Celsius:
°C = (°F - 32) × 5/9
Celsius to Kelvin:
K = °C + 273.15
Kelvin to Celsius:
°C = K - 273.15

Key Reference Points

Freezing & Boiling:
Water freezes: 0°C = 32°F = 273.15K
Water boils: 100°C = 212°F = 373.15K
Body & Room Temp:
Room temp: 20°C = 68°F = 293.15K
Body temp: 37°C = 98.6°F = 310.15K

Common Use Cases

  • Weather forecasts and climate data
  • Cooking and baking temperatures
  • Medical and body temperature readings
  • Scientific research and experiments
  • HVAC and thermostat settings
  • International travel and communication
  • Industrial and manufacturing processes

Quick Mental Conversions

  • To estimate °F from °C: Double it and add 30 (rough approximation)
  • To estimate °C from °F: Subtract 30 and divide by 2 (rough approximation)
  • Exact conversion: Use the formulas above for precision
  • -40°C = -40°F (the only point where both scales are equal)

Temperature Ranges

Weather Temperatures:
Extreme cold: Below -20°C (-4°F)
Freezing: 0°C (32°F)
Cool: 10-15°C (50-59°F)
Comfortable: 20-25°C (68-77°F)
Hot: 30-35°C (86-95°F)
Extreme heat: Above 40°C (104°F)
Cooking Temperatures:
Low oven: 150°C (300°F)
Moderate: 180°C (350°F)
Hot: 200°C (400°F)
Very hot: 230°C (450°F)
Broil: 260°C (500°F)

Why Different Scales?

Celsius was designed around water's properties (0°C freeze, 100°C boil), making it intuitive for everyday use. Fahrenheit was created to have finer gradations for weather (0°F was the coldest temperature achievable with salt-ice mixture). Kelvin is the absolute temperature scale used in science, starting at absolute zero where all molecular motion stops.