Temperature Conversion Formulas

Summary

! Kelvin ! Celsius ! Fahrenheit ! Rankine ! Delisle ! Newton ! Raumur ! Rmer
Absolute zero 0 K −273.15 C −459.67 F 0 Ra 559.73 De −90.14 N −218.52 R −135.9 R
Water freezing point 273.15 K 0 C 32 F 491.67 Ra 150 De 0 N 0 R 7.5 R
Human body temperature 310.15 K 37 C 98.6 F 558.27 Ra 94.5 De 12.21 N 29.6 R 26.93 R
Water boiling point 373.15 K 100 C 212 F 671.67 Ra 0 De 33 N 80 R 60 R

Kelvin

Desired scale Formula
Celsius C = K − 273.15
Fahrenheit F = K 9/5 − 459.67
Rankine Ra = K 9/5
Delisle De = (373.15 − K) 3/2
Newton N = (K − 273.15) 33/100
Raumur R = (K − 273.15) 4/5
Rmer R = (K − 273.15) 21/40 + 7.5

Celsius

Desired scale Formula
Kelvin K = C + 273.15
Fahrenheit F = C 9/5 + 32
Rankine Ra = C 9/5 + 491.67
Delisle De = (100 − C) 3/2
Newton N = C 33/100
Raumur R = C 4/5
Rmer R = C 21/40 + 7.5

Fahrenheit

Desired scale Formula
Kelvin K = (F + 459.67) 5/9
Celsius C = (F − 32) 5/9
Rankine Ra = F + 459.67
Delisle De = (212 − F) 5/6
Newton N = (F − 32) 11/60
Raumur R = (F − 32) 4/9
Rmer R = (F − 32) 7/24 + 7.5

Rankine

Desired scale Formula
Kelvin K = Ra 5/9
Celsius C = Ra 5/9 − 273.15
Fahrenheit F = Ra − 459.67
Delisle De = (671.67 − Ra) 5/6
Newton N = (Ra − 491.67) 11/60
Raumur R = (Ra 5/9 + 273.15) 4/5
Rmer R = (Ra − 491.67) 7/24 + 7.5

Delisle

Desired scale Formula
Kelvin K = 373.15 − De 2/3
Celsius C = 100 − De 2/3
Fahrenheit F = 212 − De 6/5
Rankine Ra = 671.67 − De 6/5
Newton N = 33 − De 11/50
Raumur R = 80 − De 8/15
Rmer R = 60 − De 7/20

Newton

Desired scale Formula
Kelvin K = N 100/33 + 273.15
Celsius C = N 100/33
Fahrenheit F = N 60/11 + 32
Rankine Ra = N 60/11 + 491.67
Delisle De = (33 − N) 50/11
Raumur R = N 80/33
Rmer R = N 35/22 + 7.5

Raumur

Desired scale Formula
Kelvin K = R 5/4 + 273.15
Celsius C = R 5/4
Fahrenheit F = R 9/4 + 32
Rankine Ra = R 9/4 + 491.67
Delisle De = (80 − R) 15/8
Newton N = R 33/80
Rmer R = R 21/32 + 7.5

Rmer

Desired scale Formula
Kelvin K = (R − 7.5) 40/21 + 273.15
Celsius C = (R − 7.5) 40/21
Fahrenheit F = (R − 7.5) 24/7 + 32
Rankine Ra = (R − 7.5) 24/7 + 491.67
Delisle De = (60 − R) 20/7
Newton N = (R − 7.5) 22/35
Raumur R = (R − 7.5) 32/21

See also

 

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