Convert Kelvin to Celsius & Other Temperature Units

📝 Temperature Units & Formulas

Unit	Formula	Value
Celsius, °C	°C = K – 273,15	0 K = -273,15 °C
Fahrenheit, °F	°F = (K x 9/5) – 459,67	0 K = -459,67 °F
Rankine, °R	°R = K x 9/5	0 K = 0 °R
Réaumur, °Ré	°Ré = (K – 273,15) x 0,8	0 K = -218,52 °Ré
Newton, °N	°N = (K – 273,15) x 0,33	0 K = -90,1395 °N
Delisle, °De	°De = (373,15 – K) x 3/2	0 K = 559,725 °De
Rømer, °Ro	°Ro = (K – 273,15) x (21/40) + 7,5	0 K = -135,90375 °Ro

🔁 Kelvin Conversion Examples

Convert Kelvin to Celsius

• 1 K – 273,15 = -272,15 °C
• 10 K – 273,15 = -263,15 °C

Convert Kelvin to Fahrenheit

• (1 K x 9/5) – 459,67 = -457,87 °F
• (10 K x 9/5) – 459,67 = -441,67 °F

Convert Kelvin to Rankine

• 1 K x 9/5 = 1.8 °R
• 10 K x 9/5 = 18 °R

Convert Kelvin to Réaumur

• (1 K – 273,15) x 0,8 = -217,72 °Ré
• (10 K – 273,15) x 0,8 = -210,52 °Ré

Convert Kelvin to Newton

• (1 K – 273,15) x 0,33 = -89,8095 °N
• (10 K – 273,15) x 0,33 = -86,8395 °N

Convert Kelvin to Delisle

• (373,15 – 1 K) x 3/2 = 558,225 °De
• (373,15 – 10 K) x 3/2 = 544,725 °De

Convert Kelvin to Rømer

• (1 K – 273,15) x (21/40) + 7,5 = -135,37875 °Ro
• (10 K – 273,15) x (21/40) + 7,5 = -130,65375 °Ro

🔗 Kelvin SI Prefixes

If you need to modify your kelvin using the metric prefix, check the tables below. Note that a prefix multiplies the value by a power of 10.

SI multiples of Kelvin

Name	SI symbol	Value	Simple value
Decakelvin	daK	101 K	10 K
Hectokelvin	hK	102 K	100 K
Kilokelvin	kK	103 K	1 000 K
Megakelvin	MK	106 K	1 000 000 K
Gigakelvin	GK	109 K	1 000 000 000 K
Terakelvin	TK	1012 K	1 000 000 000 000 K
Petakelvin	PK	1015 K	1 000 000 000 000 000 K
Exakelvin	EK	1018 K	1 000 000 000 000 000 000 K
Zettakelvin	ZK	1021 K	1 000 000 000 000 000 000 000 K
Yottakelvin	YK	1024 K	1 000 000 000 000 000 000 000 000 K
Ronnakelvin	RK	1027 K	1 000 000 000 000 000 000 000 000 000 K
Qwectokelvin	QK	1030 K	1 000 000 000 000 000 000 000 000 000 000 K

SI submultiples of Kelvin

Name	SI symbol	Value	Simple value
Decikelvin	dK	10−1 K	0.1 K
Centikelvin	cK	10−2 K	0.01 K
Millikelvin	mK	10−3 K	0.00 1 K
Microkelvin	µ K	10−6 K	0.00 000 1 K
Nanokelvin	nK	10−9 K	0.00 000 000 1 K
Picokelvin	pK	10−12 K	0.00 000 000 000 1 K
Femtokelvin	fK	10−15 K	0.00 000 000 000 000 1 K
Attokelvin	aK	10−18 K	0.00 000 000 000 000 000 1 K
Zeptokelvin	zK	10−21 K	0.00 000 000 000 000 000 000 1 K
Yoctokelvin	yK	10−24 K	0.00 000 000 000 000 000 000 000 1 K
Rontokelvin	rK	10−27 K	0.00 000 000 000 000 000 000 000 000 1 K
Qvectokelvin	qK	10−30 K	0.00 000 000 000 000 000 000 000 000 000 1 K

✅ Kelvin to Celsius Converter FAQ

✔️ How to convert K to °C?

If you need to convert degrees Kelvin (K) to degrees Celsius (°C), you can use the following formula: °C = K – 273.15. In other words, all you need to do is subtract 273.15 from your value in degrees Kelvin.

✔️ What is the formula for changing K into °F?

In order to convert degrees Kelvin to Fahrenheit, you can use the following formula: °F = (K x 9/5) – 459,67. In other words, you need to multiply your value in degrees Kelvin by 9/5 and then subtract 459,67 from it.

✔️ Is 40K hot or cold?

40 degrees Kelvin, which is -233 degrees Celsius and –388 degrees Fahrenheit, is considered to be extremely cold. This temperature can be found only in outer space and in specific scientific settings on Earth, but not in natural conditions.