Temperature Converter

Convert between Celsius, Fahrenheit, Kelvin, Rankine, and Réaumur temperature scales instantly. Perfect for cooking, science, weather, and international temperature conversions.

0 °F

Quick Conversions

How to Use the Temperature Converter

  1. Enter Temperature: Input the temperature value you want to convert
  2. Select From Scale: Choose the temperature scale you're converting from (Celsius, Fahrenheit, etc.)
  3. Select To Scale: Choose the temperature scale you want to convert to
  4. Swap Units: Use the swap button to quickly reverse the conversion
  5. View Results: See the converted temperature instantly
  6. Quick Presets: Use common temperature reference points for quick conversions
  7. All Conversions: View your input converted to all supported temperature scales

Understanding Temperature Scales

Celsius (°C)

Most widely used temperature scale worldwide. Water freezes at 0°C and boils at 100°C at sea level.

• Freezing point: 0°C
• Boiling point: 100°C
• Room temperature: ~20°C

Fahrenheit (°F)

Commonly used in the United States. Water freezes at 32°F and boils at 212°F at sea level.

• Freezing point: 32°F
• Boiling point: 212°F
• Room temperature: ~68°F

Kelvin (K)

Scientific temperature scale starting at absolute zero. Used in physics and chemistry.

• Absolute zero: 0 K
• Water freezes: 273.15 K
• Water boils: 373.15 K

Rankine (°R)

Absolute temperature scale using Fahrenheit-sized degrees. Used in engineering applications.

• Absolute zero: 0°R
• Water freezes: 491.67°R
• Water boils: 671.67°R

Réaumur (°Re)

Historical temperature scale where water freezes at 0°Re and boils at 80°Re.

• Water freezes: 0°Re
• Water boils: 80°Re
• Room temperature: ~16°Re

Common Temperature Conversions

Cooking & Food Safety

Oven Temperature
350°F = 175°C = 448 K
Food Safe Temperature
165°F = 74°C = 347 K
Refrigeration
38°F = 3°C = 276 K

Weather & Climate

Hot Summer Day
95°F = 35°C = 308 K
Comfortable Room
72°F = 22°C = 295 K
Cold Winter Day
10°F = -12°C = 261 K

Frequently Asked Questions

What's the difference between Celsius and Fahrenheit?

Celsius uses water's freezing (0°) and boiling (100°) points as reference, with 100 degrees between them. Fahrenheit uses 32° for freezing and 212° for boiling, with 180 degrees between them, making Fahrenheit degrees smaller than Celsius degrees.

When should I use Kelvin?

Kelvin is the standard unit for scientific calculations, especially in physics and chemistry. It's an absolute temperature scale starting at absolute zero (-273.15°C), making it ideal for gas laws and thermodynamic calculations.

How accurate are the conversions?

Our temperature converter uses precise mathematical formulas and displays results to 6 decimal places, then trims trailing zeros for readability. This provides scientific-level accuracy for all practical purposes.

What is absolute zero?

Absolute zero is the theoretical temperature at which all molecular motion stops. It's 0 Kelvin, -273.15°C, -459.67°F, or 0°Rankine. It's the lowest possible temperature in the universe.

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