Free · Temperature converters 🌡️

Celsius & Eight-Scale Temperature Table

Compare a Celsius reading with Fahrenheit, kelvin, Rankine and four historical temperature scales.

  • Formula & worked example
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Calculator inputs

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How to use this calculator

  1. Enter the known values in the units shown. Results update as you type.
  2. Where results are editable, change one to solve backwards. Lock a value to hold it fixed.
  3. Use the worked example to check the method. Reset restores the starting fields.

Private by default

Inputs and results stay in this browser tab. Bookify does not upload or store the values you enter.

Formula and method

A reading of 100 °C equals 212 °F, 373.15 K and 671.67 °R. In the historical conventions it equals 0 °De, 33 °N, 80 °Ré and 60 °Rø.

K = °C + 273.15; °F = (9/5)°C + 32; °R = (9/5)K

Worked example

Enter these known values and leave the other values blank.

Temperature A — initially Celsius
100 °C
Temperature B — initially Fahrenheit
212 °F
Temperature C — initially kelvin
373.15 K
Temperature D — initially Rankine
671.67 °R
Temperature E — initially Delisle
0 °De
Temperature F — initially Newton
33 °N
Temperature G — initially Réaumur
80 °Ré
Temperature H — initially Rømer
60 °Rø

Assumptions and limitations

  • These are temperature readings, not temperature differences. Offset terms apply to readings; a change of 1 °C instead equals a change of 1 K or 1.8 °F.
  • For this ordinary thermodynamic-temperature model, every reading must be at or above 0 K: −273.15 °C or −459.67 °F. Specialized negative-temperature statistical states are outside the model.
  • Historical scales use fixed conventional linear relationships. Delisle runs downward as Celsius rises. A conversion does not determine boiling or freezing conditions.
  • Each row has its own unit selector. Its initial scale is a starting choice; use the currently selected unit when entering or reading a value.

Common questions

Can I convert a temperature difference with this table?

Use an interval converter for differences. For example, a 10 °C increase is an 18 °F increase, while a reading of 10 °C equals 50 °F.

Why does Delisle decrease as Celsius increases?

This historical convention uses °De = 1.5 × (100 − °C), so its direction is reversed.

References

Bookify enforces the 0 K lower bound for every editable thermodynamic-temperature reading.

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