Megajoule to BTU (th) Converter

Energy Converter

27 units available

Decimals:

From

To

948.451653

1 MJ = 948.451653 BTU

Formula:

BTU = MJ × 948.451652677

With your value: 1 MJ = 948.45165268 BTU

How big is that?

Everyday references on a logarithmic scale, all expressed in megajoule so you can sanity-check the result.

Heartbeat (1/1.0e+6 your value)0.00000100 MJ

AA battery charge (1/1.0e+2 your value)0.0100 MJ

Slice of bread (1/3.6 your value)0.280 MJ

Your value1.00 MJ

Daily food intake (8.4× your value)8.40 MJ

Litre of petrol (34× your value)34.2 MJ

Other Megajoule to BTU (th) conversions

2 MJ to BTU 3 MJ to BTU 4 MJ to BTU 5 MJ to BTU 6 MJ to BTU 7 MJ to BTU 8 MJ to BTU

Megajoule to BTU (th) Conversion Table

Megajoule (MJ)	BTU (th) (BTU)
0.5	474.225826
1	948.451653
2	1,896.903305
5	4,742.258263
10	9,484.516527
15	14,226.77479
20	18,969.033054
25	23,711.291317
50	47,422.582634
100	94,845.165268
250	237,112.913169
500	474,225.826339
1000	948,451.652677

BTU (th) to Megajoule Conversion Table

BTU (th) (BTU)	Megajoule (MJ)
0.5	0.000527
1	0.001054
2	0.002109
5	0.005272
10	0.010544
15	0.015815
20	0.021087
25	0.026359
50	0.052717
100	0.105435
250	0.263588
500	0.527175
1000	1.05435

Where these values come from

Every factor on this page is traced to the document that defines it. See the full provenance dataset or our methodology.

Megajoule (MJ)

Energy

Exact conversion

Derived from the joule (1 J = 1 kg·m²/s²). Thermochemical and IT calories, BTU and kWh are exact defined multiples.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

BTU (th) (BTU)

Energy

Exact conversion

The International Table BTU is exactly 1055.055 852 62 J.

Thermochemical and 39 °F BTU definitions differ by up to 0.2 %.

Source: NIST Special Publication 811, Guide for the Use of the International System of Units

National Institute of Standards and Technology (US) · Reviewed 2026-07-01

How to Convert Megajoule to BTU (th)

To convert from Megajoule (MJ) to BTU (th) (BTU), multiply the value by 948.451652677.

Formula: BTU = MJ × 948.451652677

Reverse: MJ = BTU × 0.00105435

Step-by-Step Example

Start with your value in Megajoule. For example: 5 MJ
Multiply by the conversion factor: 5 x 948.451652677
The result is: 4,742.258263 BTU

About Megajoule

The megajoule (MJ) is a unit of energy and work. One megajoule equals 1.000000 × 10^+6 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

About BTU (th)

The btu (th) (BTU) is a unit of energy and work. One btu (th) equals 1054.35 joules. UnitConvertLab converts it against every other energy unit using this exact definition, so results are reproducible to full double precision rather than rounded lookup tables.

Common uses: energy calculations, engineering and science, education.

Frequently Asked Questions

How many BTU (th) are in 1 Megajoule?

There are exactly 948.451652677 BTU (th) in 1 Megajoule. This means the conversion factor from Megajoule to BTU (th) is 948.451652677.

What is the formula to convert Megajoule to BTU (th)?

The formula to convert Megajoule to BTU (th) is: BTU = MJ × 948.451652677. For example, to convert 10 Megajoule to BTU (th), you would multiply 10 by 948.451652677.

What is a Megajoule?