Free · Temperature converters 🌡️

Fahrenheit & Eight-Scale Temperature Table

Start with Fahrenheit or another selected scale and compare eight representations of one temperature.

  • 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.

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

Formula and method

A reading of 68 °F equals 20 °C, 293.15 K and 527.67 °R. The same reading is 120 °De, 6.6 °N, 16 °Ré and 18 °Rø.

°C = (5/9)(°F − 32); K = (5/9)(°F + 459.67)

Worked example

Enter these known values and leave the other values blank.

Temperature A — initially Fahrenheit
68 °F
Temperature B — initially Celsius
20 °C
Temperature C — initially kelvin
293.15 K
Temperature D — initially Rankine
527.67 °R
Temperature E — initially Delisle
120 °De
Temperature F — initially Newton
6.6 °N
Temperature G — initially Réaumur
16 °Ré
Temperature H — initially Rømer
18 °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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