Temperature Converter
Quickly convert temperatures across all major scientific and historical scales.
C = (F-32)*5/9; K = C+273.15; R = (C+273.15)*9/5; Re = C*0.8
100 °C = 212 °F = 373.15 K = 671.67 °R = 80 °Re
How do I convert Celsius to Fahrenheit?
Formula: °F = (°C × 9/5) + 32. Example: 20°C = (20 × 1.8) + 32 = 68°F. Common reference points: 0°C = 32°F (freezing), 100°C = 212°F (boiling).
What is the Kelvin scale?
Kelvin (K) is the absolute temperature scale used in science. 0 K is absolute zero, the point where all molecular motion ceases. Conversion: K = °C + 273.15.
What are Rankine and Réaumur scales?
Rankine (°R) is an absolute temperature scale like Kelvin but using Fahrenheit degree increments. Réaumur (°Re) was once common in Europe; its freezing point is 0° and boiling point is 80°.
How do I convert Fahrenheit to Rankine?
Formula: °R = °F + 459.67. This scale is often used in engineering systems in the United States.
📐 Formula
C = (F-32)*5/9; K = C+273.15; R = (C+273.15)*9/5; Re = C*0.8
📝 Example Calculation
100 °C = 212 °F = 373.15 K = 671.67 °R = 80 °Re
❓ Frequently Asked Questions
How do I convert Celsius to Fahrenheit?▼
Formula: °F = (°C × 9/5) + 32. Example: 20°C = (20 × 1.8) + 32 = 68°F. Common reference points: 0°C = 32°F (freezing), 100°C = 212°F (boiling).
What is the Kelvin scale?▼
Kelvin (K) is the absolute temperature scale used in science. 0 K is absolute zero, the point where all molecular motion ceases. Conversion: K = °C + 273.15.
What are Rankine and Réaumur scales?▼
Rankine (°R) is an absolute temperature scale like Kelvin but using Fahrenheit degree increments. Réaumur (°Re) was once common in Europe; its freezing point is 0° and boiling point is 80°.
How do I convert Fahrenheit to Rankine?▼
Formula: °R = °F + 459.67. This scale is often used in engineering systems in the United States.