Authoritative definitions of the International System of Units and SI prefixes.
Dedicated unit pair
Megajoules to BTU (International Table)
Convert MJ to BTU instantly, then review the formula, assumptions, and rounding guidance.
Energy, work, heat & powerInstant result
Decimals
Formula result = input × 1000000 ÷ 1055.05585262. 1 MJ = 947.8171 BTU
Common examples
One value, several units
Joules1,000,000 J
Kilojoules1,000 kJ
Watt-hours277.7778 Wh
Kilowatt-hours0.2778 kWh
Thermochemical calories239,005.7361 cal
Kilocalories239.0057 kcal
BTU (International Table)947.8171 BTU
Conversion table
| MJ | BTU |
|---|---|
| 1 MJ | 947.8171 BTU |
| 2 MJ | 1,895.6342 BTU |
| 5 MJ | 4,739.0856 BTU |
| 10 MJ | 9,478.1712 BTU |
| 25 MJ | 23,695.428 BTU |
| 50 MJ | 47,390.856 BTU |
| 100 MJ | 94,781.712 BTU |
Conversion chart
1 MJ947.8171 BTU
5 MJ4,739.0856 BTU
10 MJ9,478.1712 BTU
25 MJ23,695.428 BTU
50 MJ47,390.856 BTU
Worked example
1 kilowatt-hour equals exactly 3.6 megajoules.
Unit definition
Megajoules (MJ) One megajoules equals 1,000,000 joule.
Unit history
Megajoules is represented here using its modern SI definition or an internationally accepted relationship to an SI base unit.
Step by step
1. Parse the value, including fractions.
2. Convert MJ to joule.
3. Convert the base value to BTU and apply your display precision.
Understand the result before using it
Megajoules to BTU (International Table) converts a value measured in Megajoules (MJ) into the equivalent value in BTU (International Table) (BTU). The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1000000 ÷ 1055.05585262
Assumptions
- Megajoules and BTU (International Table) represent the same energy, work & heat quantity.
- The input is expressed in MJ; the output is expressed in BTU.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 MJ = 947.817120313 BTU. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a MJ measurement in a document that expects BTU.
- Compare a megajoules value with a value reported in btu (international table).
- Check the MJ-to-BTU arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Do not confuse MJ with another unit that has a similar name or symbol.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
How do I convert Megajoules to BTU (International Table)?
result = input × 1000000 ÷ 1055.05585262 Using the displayed relationship, 1 MJ equals 947.817120313 BTU.
How many BTU (International Table) are in one Megajoules?
One Megajoules is 947.817120313 BTU (International Table). The displayed digits may be rounded.
Can I reverse the MJ to BTU conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts BTU back to MJ.
Is the Megajoules to BTU (International Table) result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.