Kilojoule to British Thermal Unit Converter
Energy · unit-converter
Convert Kilojoule to British Thermal Unit with fixed input and output units, a step-by-step formula line, and reference tables. Factors are joule-based; food energy uses thermochemical calories. The full Energy Converter also includes MMBtu, toe, thermal kWh, and MeV/GeV.
Calculator
From: Kilojoule (kj)
To: British Thermal Unit (btu)
About Kilojoule
One kilojoule is 1,000 J. Scientific and engineering contexts often use kJ alongside joules.
About British Thermal Unit
The British thermal unit used here is the IT BTU: ≈ 1,055.056 J. It appears in HVAC, heating equipment, and US engineering data.
How to convert kilojoules to british thermal units
1 kilojoule is equal to 0.94781712031332 british thermal unit when both are expressed in joule-equivalents:
1 kj = (1,000 J ÷ 1,055.05585262 J) btu = 0.94781712031332 btu
Each kilojoule is defined as 1,000 J and each british thermal unit as 1,055.05585262 J in this tool, so one kj equals 1,000 ÷ 1,055.05585262 btu = 0.94781712031332 btu.
Let d(kj) be the numeric amount in Kilojoule (kj), and d(btu) the amount in British Thermal Unit (btu). Then:
d(btu) = d(kj) × (1,000 / 1,055.05585262)
Equivalently, divide by how many kj fit into one btu (joules per btu divided by joules per kj):
d(btu) = d(kj) ÷ 1.05505585262
Or: british thermal unit = kilojoule ÷ 1.05505585262
Examples
Example #1: Convert 1 kj to british thermal unit
1 kj = 1 kj × (1,000/1,055.05585262) btu = 0.9478171203 btu
1 kj = 1 kj ÷ 1.05505585262 = 0.9478171203 btu
Example #2: Convert 10 kj to british thermal unit
10 kj = 10 kj × (1,000/1,055.05585262) btu = 9.4781712031 btu
10 kj = 10 kj ÷ 1.05505585262 = 9.4781712031 btu
Summary
To convert Kilojoule to British Thermal Unit, multiply the value in kj by the ratio of joules per kj divided by joules per btu. Equivalently: value_btu = value_kj × (1000 / 1055.05585262). Numerically, 1 kj equals 0.9478171203133172 btu.
Relationship context
You are converting between SI energy (joules) (Kilojoules) and US / imperial engineering units (BTU, therm, ft·lb) (British Thermal Units). All values are mapped through joules first. The numeric factor is 9.478171e-1.
Conversion tables
| Kilojoule (kj) | British Thermal Unit (btu) |
|---|---|
| 0.1 | 0.094781712 |
| 1 | 0.9478171203 |
| 2 | 1.8956342406 |
| 3 | 2.8434513609 |
| 4 | 3.7912684812 |
| 5 | 4.7390856016 |
| 6 | 5.6869027219 |
| 7 | 6.6347198422 |
| 8 | 7.5825369625 |
| 9 | 8.5303540828 |
| Kilojoule (kj) | British Thermal Unit (btu) |
|---|---|
| 10 | 9.4781712031 |
| 20 | 18.9563424063 |
| 30 | 28.4345136094 |
| 40 | 37.9126848125 |
| 50 | 47.3908560157 |
| 60 | 56.8690272188 |
| 70 | 66.3471984219 |
| 80 | 75.8253696251 |
| 90 | 85.3035408282 |
| 100 | 94.7817120313 |