BTU to kJ
One BTU is the heat needed to raise a pound of water by 1 °F, about 1.055 kJ. Air conditioners and boilers are rated in BTU per hour, and 12,000 BTU/h is one ton of refrigeration.
=
Common values
Formula
kJ = BTU × 1.055056
An air conditioner’s “12,000 BTU” is a per-hour figure. As a rule of thumb, twenty square metres needs about 5,000 BTU/h.
Frequently asked questions
QHow many kJ is 1 BTU?
1 BTU is 1.0551 kJ, and 10 BTU is 10.5506 kJ. Type any value in the box above to convert instantly.
QAnd how many BTU is 1 kJ?
1 kJ is 0.9478 BTU. This converter works both ways, so typing in the right box updates the left one.
QWhere is this unit used?
An air conditioner’s “12,000 BTU” is a per-hour figure. As a rule of thumb, twenty square metres needs about 5,000 BTU/h.
Other converters
Therms to kWhConvert the gas billing unit to kilowatt-hoursBTU to watt-hoursConvert the heat unit BTU into watt-hoursTonnes of Oil Equivalent to MWhConvert the energy statistics unit to electricityTons of TNT to GigajoulesConvert explosive yield to energyCalories to KilojoulesFood energykcal to kWhConvert food energy to electrical energy
Traditional units (geun, doe, majigi and so on) vary by region and product.