Conversions

Verified calculator with a transparent formula

Conversions

Kelvin to Réaumur Converter.

Converts a temperature from Kelvin to degrees Réaumur (°Ré).

Results update live as you type.
ƒ

Your inputs

How it works

  1. 1

    Subtract 273.15 from the Kelvin value to get Celsius.

  2. 2

    Multiply the Celsius value by 0.8.

  3. 3

    The result is the temperature in degrees Réaumur.

(kelvin - 273.15) * 0.8

Frequently asked questions

What is the freezing point of water in Réaumur?

0 °Ré, which corresponds to 273.15 K.

What is the boiling point of water in Réaumur?

80 °Ré, which corresponds to 373.15 K.

Can Kelvin be negative?

No, Kelvin is an absolute temperature scale starting at absolute zero (0 K).

Explore this calculator category

ConversionsBrowse all

Results

Formula checked

Temperature

0°Ré

Ask Anything

Estimate for general guidance only — verify important decisions with an appropriate professional.

How it works

Converts a temperature from Kelvin to degrees Réaumur (°Ré).

  1. Subtract 273.15 from the Kelvin value to get Celsius.
  2. Multiply the Celsius value by 0.8.
  3. The result is the temperature in degrees Réaumur.

Formulas

The math behind this calculator, written out so you can verify the result.

Kelvin to Réaumur

°Ré = (K - 273.15) × 0.8

First convert Kelvin to Celsius by subtracting 273.15, then multiply by 0.8 to get Réaumur.

Example:

Input: K = 300

Calculation: (300 - 273.15) × 0.8 = 26.85 × 0.8

Result: 21.48 °Ré

Real-world use cases

Where this calculation shows up in everyday life.

Historical recipes

Some older European recipes use Réaumur for oven temperatures.

Example: Convert 250 °Ré to Kelvin.

Scientific literature

Older scientific papers may report temperatures in Réaumur.

Example: Convert 30 °Ré to Kelvin.

Tips and common mistakes

Tips

  • Remember that 0 °Ré is the freezing point of water.
  • Use 273.15 for exact conversions, not 273.
  • Réaumur is rarely used today, but it's still found in some historical contexts.

Common Mistakes to Avoid

  • Forgetting to subtract 273.15 before multiplying.
  • Using 0.8 instead of 0.8 (which is correct) but mixing up with other scales.
  • Assuming Réaumur and Celsius are the same at all temperatures.

Assumptions and limitations

  • Use the stated inputs and units.
  • Results are estimates for planning and education.
  • Check measurements and source data before making an important decision.