Kilojoules to BTU Converter
Convert Kilojoules (kJ) to BTU (BTU) instantly, or use the conversion table below to look up common values.
Kilojoules to BTU conversion table
| Kilojoules (kJ) | BTU (BTU) |
|---|---|
| 1 | 0.947817 |
| 2 | 1.895634 |
| 3 | 2.843451 |
| 4 | 3.791268 |
| 5 | 4.739086 |
| 10 | 9.478171 |
| 25 | 23.695428 |
| 50 | 47.390856 |
| 100 | 94.781712 |
How to convert Kilojoules to BTU
1 kJ equals 0.947817 BTU. Use the converter above for any value, or read the table for common conversions.
BTU = kJ × 0.9478171203133172 · kJ = BTU × 1.05505585262Multiply a kilojoules figure by 0.947817 to get btu, or divide it by 1.055056 to go the other way.
Worked examples
- 1 kJ= 0.947817 BTU
- 5 kJ= 4.739086 BTU
- 10 kJ= 9.478171 BTU
- 100 kJ= 94.781712 BTU
- 500 kJ= 473.90856 BTU
What these units are
Kilojoules (kJ). A kilojoule is 1,000 joules. It is used for food energy in most countries outside the United States, and for small industrial figures.
BTU (BTU). A BTU (British thermal unit) is 1,055.05585262 joules — the energy needed to heat one pound of water by one degree Fahrenheit. It is used for heating and cooling capacity.
All factors are exact definitions, so only the display is rounded.
Converting Kilojoules to BTU in practice
Working in kilojoules
One kilojoule is exactly 1,000 joules, and the symbol is kJ. It is the joule multiple that food packaging commonly prints, with energy shown in kilojoules beside kilocalories, and chemistry uses it for reaction energies.
Nutrition panels, exercise machines and dietary advice report energy in kilojoules wherever the metric system is used. Materials and fuel data, such as energy content per kilogram, are tabulated in kilojoules as well.
The step from kilojoules to megajoules divides by exactly one thousand, so nothing is lost in the conversion. One kilocalorie equals 4.184 kilojoules, which is how the two columns on a food label correspond.
A reader who compares a kilojoule figure with a kilocalorie figure as though they were the same number will misjudge the energy by more than four times. The label's two columns state one amount in two units.
Kilojoules and kilocalories are the two energy columns on a food label, and the kilojoule figure is the larger number because one kilocalorie is 4.184 kilojoules. Megajoules take over where kilojoule figures become long, as they do for fuels.
Checking a kilojoules to btu conversion
Energy units are defined against the joule, so every conversion in this dimension is a single exact multiplication by a published number rather than a chain of steps that could accumulate error.
The pair that needs care is the kilowatt-hour, because it looks like a power unit and is not. It is a watt sustained for an hour, which is why an electricity meter counts in kilowatt-hours while a generator is rated in kilowatts: one is an amount, the other is a rate, and only a duration links them.
To check an energy conversion, express both sides in joules or both in kilowatt-hours before comparing. The commonest mistake is treating a food calorie as a calorie when the label means a kilocalorie, which understates the figure a thousandfold.
Tanzania reference points
Real quantities, converted into the units on this page.
One unit of electricity on a Tanzanian prepaid meter
1 kWh = 3,600 kJ = 3,412.141633 BTU
The average domestic rate was about 229.59 TZS per kWh as of December 2025, including taxes and supply. That is an average across domestic customers, not the marginal rate on a bill.
Source: GlobalPetrolPrices — Tanzania electricity prices (compiled from EWURA/TANESCO tariffs) · verified 2026-09-14
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