BTU to Kilojoules
Snapshot
1 BTU equals 1.055056 Kilojoules. Conversion Encyclopedia uses the same fixed conversion basis across the calculator, common values, and reverse page for this page.
- Reference basis: This conversion uses exact joule-based energy definitions.
- Example: For 5 BTU, the result equals 5.275279 Kilojoules.
- Use the reverse page if you need the opposite direction with the same basis.
Use the interactive calculator below for custom values and the common-value table for quick checks.
Converter Calculator
1.055056 Kilojoules (kJ)
SwitchExplanation
Formula: Kilojoules = BTU × 1.055056. Why: calories, kilocalories, and BTU each use fixed joule equivalents, so the route moves through joules and preserves one deterministic factor.
BTU (BTU): a thermal energy unit with a fixed joule equivalent, common in HVAC, heating, and thermal-system references.
Kilojoules (kJ): an energy unit equal to 1,000 joules, common in science, engineering, and nutritional labeling.
This route is useful when translating thermal and nutritional energy values across calories, kilocalories, BTU, and joule-based references without mixing the underlying definitions.
This conversion is purely multiplicative because both units reduce through joules using fixed energy definitions with no offset.
Common Conversion Values
| BTU (BTU) | Kilojoules (kJ) |
|---|---|
| 1 | 1.055056 |
| 5 | 5.275279 |
| 10 | 10.550559 |
| 100 | 105.505585 |
| 1,000 | 1,055.055853 |
| 3,600 | 3,798.201069 |
| 10,000 | 10,550.558526 |
| 1,000,000 | 1,055,055.85262 |
Frequently Asked Questions
What is 1 btu in kilojoules?
1 BTU equals 1.055056 Kilojoules on this page.
Does this BTU to Kilojoules page use fixed joule equivalents for thermal units?
Yes. Calories, kilocalories, and BTU each use fixed joule equivalents on this page, so thermal and nutritional energy comparisons stay consistent across the direct answer, calculator, and table.
When would I convert btu to kilojoules?
This route is useful when translating thermal and nutritional energy values across calories, kilocalories, BTU, and joule-based references without mixing the underlying definitions.
How do I reverse BTU to Kilojoules?
Use the mirror Kilojoules to BTU route; it applies the inverse relationship with the same energy assumptions.