Megajoules to Foot Pounds
Convert megajoules to foot pounds instantly — one megajoule is 737562 foot pounds.
| Megajoules | Foot Pounds |
|---|---|
| 1 MJ | 737562.149277 ft·lb |
| 2 MJ | 1475124.298555 ft·lb |
| 3 MJ | 2212686.447832 ft·lb |
| 5 MJ | 3687810.746386 ft·lb |
| 10 MJ | 7375621.492773 ft·lb |
| 25 MJ | 18439053.731932 ft·lb |
| 50 MJ | 36878107.463863 ft·lb |
| 100 MJ | 73756214.927727 ft·lb |
How to use
- Enter a value in the Megajoules field.
- The Foot Pounds figure appears immediately — no button to press.
- Typing in the Foot Pounds field converts back to Megajoules the same way.
- Use the reference table for the values that come up most often.
Megajoules to Foot Pounds formula
To convert megajoules to foot pounds, multiply by 737562.149.
ft·lb = MJ × 737562.149
Why this factor: the megajoule and the foot-pound are both defined against the joule, so dividing one definition by the other gives 737562.149 directly. Both definitions are set out in full below.
To go the other way, divide by 737562.149 — or use the Foot Pounds to Megajoules converter, which is the same calculation reversed.
Worked example
Given 500 MJ, multiplying by 737562.149 yields 368781074.638633 ft·lb.
500 MJ × 737562.149 = 368781074.638633 ft·lb
The converter above does this for any value you type, in either direction.
What is a megajoule?
A megajoule is one million joules, used for substantial energy quantities.
Definition: Exactly 1×10⁶ joules. One kilowatt-hour is exactly 3.6 MJ.
Where it is used: Fuel energy content, natural gas billing, and industrial energy accounting.
What is a foot-pound?
A foot-pound is the work done by one pound-force acting through one foot.
Definition: About 1.3558179 joules.
Where it is used: US mechanical work and torque figures, fastener specifications, and firearm muzzle energy.
Worth knowing: As a torque unit it is properly 'pound-foot' (lbf·ft); as an energy unit it is 'foot-pound'. The numbers coincide but the quantities differ.
Megajoules vs Foot Pounds
The megajoule is a metric unit while the foot-pound is a US customary unit. That is why the factor between them is not a round number: the two systems were defined independently and only later tied together by exact agreement.
Frequently asked questions
How many foot pounds are in a megajoule?
One megajoule equals 737562.149 foot pounds.
What is the formula to convert megajoules to foot pounds?
Multiply the number of megajoules by 737562.149. To reverse it, divide by 737562.149 instead.
How do I convert foot pounds back to megajoules?
Divide by 737562.149, which is the same as multiplying by 1.35581795e-06.
How many foot pounds are in 10 megajoules?
10 MJ works out to 7375621.492773 ft·lb.
Is there anything to watch out for with foot pounds?
As a torque unit it is properly 'pound-foot' (lbf·ft); as an energy unit it is 'foot-pound'. The numbers coincide but the quantities differ.
How is the megajoule defined?
Exactly 1×10⁶ joules. One kilowatt-hour is exactly 3.6 MJ.