Temperature Converter

How to Convert Temperature?

To convert temperature between different units, use the appropriate conversion formula. For example, to convert Celsius to Fahrenheit, multiply by 9/5 and add 32. To convert Celsius to Kelvin, add 273.15.

Temperature Conversion Principles

1. Celsius (°C)

The Celsius scale is based on the freezing (0°C) and boiling (100°C) points of water at standard atmospheric pressure.

2. Fahrenheit (°F)

The Fahrenheit scale sets the freezing point of water at 32°F and the boiling point at 212°F.

3. Kelvin (K)

The Kelvin scale is an absolute temperature scale starting at absolute zero (0 K). 0°C = 273.15 K.

4. Rankine (°R)

The Rankine scale is used mainly in engineering fields in the US. 0°R = 0 K.

5. Conversion Formulas

• Celsius to Fahrenheit: (°C × 9/5) + 32 = °F
• Fahrenheit to Celsius: (°F − 32) × 5/9 = °C
• Celsius to Kelvin: °C + 273.15 = K
• Kelvin to Celsius: K − 273.15 = °C
• Fahrenheit to Kelvin: (°F − 32) × 5/9 + 273.15 = K
• Kelvin to Fahrenheit: (K − 273.15) × 9/5 + 32 = °F
• Celsius to Rankine: (°C + 273.15) × 9/5 = °R
• Rankine to Celsius: (°R − 491.67) × 5/9 = °C

Common Temperature Units

Celsius (°C)

Used worldwide for most temperature measurements.

Fahrenheit (°F)

Used mainly in the United States.

Kelvin (K)

Used in science and engineering.

Rankine (°R)

Used in some engineering fields.