Temperature conversion formulas

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Contents

Summary

kelvin Celsius Fahrenheit Rankine Delisle Newton Réaumur Rømer
Absolute zero 0 K -273.15 °C -459.67 °F 0 °Ra 559,73 °De -90.14 °N -218.52 °Ré -135.9 °Rø
Water freezing point 273.15 K 0 °C 32 °F 491.67 °Ra 150 °De 0 °N 0 °Ré 7.5 °Rø
Human body temperature 310.15 K 37 °C 98.6 °F 558.27 °Ra 94.5 °De 12.21 °N 29.6 °Ré 26.93 °Rø
Water boiling point 373.15 K 100 °C 212 °F 671.67 °Ra 0 °De 33 °N 80 °Ré 60 °Rø

From kelvin

Desired scale Formula
Celsius °C = K − 273.15
Fahrenheit °F = K × 1.8 − 459.67
Rankine °Ra = K × 1.8
Delisle °De = (373.15 − K) × 1.5
Newton °N = (K − 273.15) × 33/100
Réaumur °Ré = (K − 273.15) × 0.8
Rømer °Rø = (K − 273.15) × 21/40 + 7.5

From Celsius

Desired scale Formula
kelvin K = °C + 273.15
Fahrenheit °F = °C × 1.8 + 32
Rankine °Ra = °C × 1.8 + 491.67
Delisle °De = (100 − °C) × 1.5
Newton °N = °C × 33/100
Réaumur °Ré = °C × 0.8
Rømer °Rø = °C × 21/40 + 7.5

From Fahrenheit

Desired scale Formula
kelvin K = (°F + 459.67) / 1.8
Celsius °C = (°F − 32) / 1.8
Rankine °Ra = °F + 459.67
Delisle °De = (212 − °F) × 5/6
Newton °N = (°F − 32) × 11/60
Réaumur °Ré = (°F − 32) / 2.25
Rømer °Rø = (°F − 32) × 7/24 + 7.5

From Rankine

Desired scale Formula
kelvin K = °Ra / 1.8
Celsius °C = °Ra / 1.8 - 273.15
Fahrenheit °F = °Ra - 459.67
Delisle °De = (671.67 − °Ra) × 5/6
Newton °N = (°Ra − 491.67) × 11/60
Réaumur °Ré = (°Ra / 1.8 + 273.15) × 0.8
Rømer °Rø = (°Ra − 491.67) × 7/24 + 7.5

From Delisle

Desired scale Formula
kelvin K = 373.15 − °De × 2/3
Celsius °C = 100 − °De × 2/3
Fahrenheit °F = 212 − °De × 1.2
Rankine °Ra = 671.67 − °De × 1.2
Newton °N = 33 − °De × 0.22
Réaumur °Ré = 80 − °De × 8/15
Rømer °Rø = 60 − °De × 0.35

From Newton

Desired scale Formula
kelvin K = °N × 100/33 + 273.15
Celsius °C = °N × 100/33
Fahrenheit °F = °N &times 60/11 + 32
Rankine °Ra = °N × 60/11 + 491.67
Delisle °De = (33 − °N) × 50/11
Réaumur °Ré = °N × 80/33
Rømer °Rø = °N × 35/22 + 7.5

From Réaumur

Desired scale Formula
kelvin K = °Ré / 0.8 + 273.15
Celsius °C = °Ré / 0.8
Fahrenheit °F = °Ré × 2.25 + 32
Rankine °Ra = °Ré × 2.25 + 491.67
Delisle °De = (80 − °Ré) × 1.875
Newton °N = °Ré × 33/80
Rømer °Rø = °Ré × 21/32 + 7.5

From Rømer

Desired scale Formula
kelvin K = (°Rø − 7.5) × 40/21 + 273.15
Celsius °C = (°Rø − 7.5) × 40/21
Fahrenheit °F = (°Rø − 7.5) × 24/7 + 32
Rankine °Ra = (°Rø − 7.5) × 24/7 + 491.67
Delisle °De = (60 − °Rø) × 20/7
Newton °N = (°Rø − 7.5) × 22/35
Réaumur °Ré = (°Rø − 7.5) × 32/21
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