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Temperature scales conversion calculator for converting between Fahrenheit °F, Celsius °C (Centigrade), Kelvin K, Reaumur °r and Rankine °R plus manual conversion formulas.

Temperature Conversion Calculator

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This converter allows you to do instant conversions between various temperature measurements in °F, °C, K, °r, °R scales.
You may enter whole numbers, decimals or fractions ie: 7, 29.35, 15 3/4 and plus + or minus - signs as well.

Temperature Conversion Factors

Manual conversion formulas:

from Fahrenheit °F to Celsius °C calculation:

Subtract 32 from the Fahrenheit figure, multiply by 5, then divide by 9 to get Centigrade figure.

from Celsius °C to Fahrenheit °F calculation:

Multiply Centigrade figure by 9, divide by 5, then add 32 to get Fahrenheit figure.

Kelvin calculation

To calculate Kelvin figure, simply add 273.15 number to the Celsius temperature degree and you get the temperature reading in Kelvin thermodynamic temperature unit:

K = °C + 273.15 and correspondingly.

Take the figure and you can manually convert it to Fahrenheit with:

K = °F + 459.67 × 5/9

Where the 5/9 is number 0.556 and, precisely even more accurate 0.55555555555555555555555555555556 (32 decimal points) to end up with the exact 273.15 mark correct metrics.

The formulae for temperature with minus degrees readings:

K = 273.15 − °C (below zero C value used)
K = 459.67 − °F × 5/9 (minus F value used)

Kelvin is not associated with thermal ° degree symbol just with capital letter K. Zero kelvins, 0 K, equals to coldest possible temperature that can be measured "absolute zero" which is the thermodynamic (absolute) temperature -459.67°F or -273.15°C on scales.

Chart: K > °C > °F

Table of content
KelvinCelsiusFahrenheit
250.15 K-23°C-9.4°F freezer storage
256.15 K-17°C1.4°F
273.15 K0°C32°F water freeze
283.15 K10°C50°F
293.15 K20°C68°F room temp
313.15 K40°C104°F
328.15 K55°C131°F
338.15 K65°C149°F
353.15 K80°C176°F
358.15 K85°C185°F
363.15 K90°C194°F
368.15 K95°C203°F simmering water
373.15 K100°C212°F boiling water
378.15 K105°C221°F
388.15 K115°C239°F
393.15 K120°C248°F
403.15 K130°C266°F
418.15 K145°C293°F
423.15 K150°C302°F
428.15 K155°C311°F
433.15 K160°C320°F
448.15 K175°C347°F
453.15 K180°C356°F
463.15 K190°C374°F baking temp
468.15 K195°C383°F
473.15 K200°C392°F
478.15 K205°C401°F
483.15 K210°C410°F
488.15 K215°C419°F
493.15 K220°C428°F hot oven
498.15 K225°C437°F
503.15 K230°C446°F
508.15 K235°C455°F
513.15 K240°C464°F
518.15 K245°C473°F very hot oven
523.15 K250°C482°F
528.15 K255°C491°F
533.15 K260°C500°F
538.15 K265°C509°F
543.15 K270°C518°F
548.15 K275°C527°F
553.15 K280°C536°F
558.15 K285°C545°F
573.15 K300°C572°F
588.15 K315°C599°F
603.15 K330°C626°F
618.15 K345°C653°F
633.15 K360°C680°F
648.15 K375°C707°F

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