British Thermal Unit to Megajoule Converter
Energy · unit-converter
Convert British Thermal Unit to Megajoule 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: British Thermal Unit (btu)
To: Megajoule (mj)
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.
About Megajoule
One megajoule is 1,000,000 J. It is common in fuel-content and engineering thermal calculations.
How to convert british thermal units to megajoules
1 british thermal unit is equal to 0.00105505585262 megajoule when both are expressed in joule-equivalents:
1 btu = (1,055.05585262 J ÷ 1,000,000 J) mj = 0.00105505585262 mj
Each british thermal unit is defined as 1,055.05585262 J and each megajoule as 1,000,000 J in this tool, so one btu equals 1,055.05585262 ÷ 1,000,000 mj = 0.00105505585262 mj.
Let d(btu) be the numeric amount in British Thermal Unit (btu), and d(mj) the amount in Megajoule (mj). Then:
d(mj) = d(btu) × (1,055.05585262 / 1,000,000)
Equivalently, divide by how many btu fit into one mj (joules per mj divided by joules per btu):
d(mj) = d(btu) ÷ 947.81712031331722
Or: megajoule = british thermal unit ÷ 947.81712031331722
Examples
Example #1: Convert 1 btu to megajoule
1 btu = 1 btu × (1,055.05585262/1,000,000) mj = 0.0010550559 mj
1 btu = 1 btu ÷ 947.81712031331722 = 0.0010550559 mj
Example #2: Convert 10 btu to megajoule
10 btu = 10 btu × (1,055.05585262/1,000,000) mj = 0.0105505585 mj
10 btu = 10 btu ÷ 947.81712031331722 = 0.0105505585 mj
Summary
To convert British Thermal Unit to Megajoule, multiply the value in btu by the ratio of joules per btu divided by joules per mj. Equivalently: value_mj = value_btu × (1055.05585262 / 1000000). Numerically, 1 btu equals 0.00105505585262 mj.
Relationship context
You are converting between US / imperial engineering units (BTU, therm, ft·lb) (British Thermal Units) and SI energy (joules) (Megajoules). All values are mapped through joules first. The numeric factor is 1.055056e-3.
Conversion tables
| British Thermal Unit (btu) | Megajoule (mj) |
|---|---|
| 0.1 | 0.0001055056 |
| 1 | 0.0010550559 |
| 2 | 0.0021101117 |
| 3 | 0.0031651676 |
| 4 | 0.0042202234 |
| 5 | 0.0052752793 |
| 6 | 0.0063303351 |
| 7 | 0.007385391 |
| 8 | 0.0084404468 |
| 9 | 0.0094955027 |
| British Thermal Unit (btu) | Megajoule (mj) |
|---|---|
| 10 | 0.0105505585 |
| 20 | 0.0211011171 |
| 30 | 0.0316516756 |
| 40 | 0.0422022341 |
| 50 | 0.0527527926 |
| 60 | 0.0633033512 |
| 70 | 0.0738539097 |
| 80 | 0.0844044682 |
| 90 | 0.0949550267 |
| 100 | 0.1055055853 |