Work from one pound-force over one foot.
Foot-pounds to Petajoules Converter — ft-lb to PJ
Convert Foot-pound (ft-lb) to Petajoule (PJ) using the exact conversion factor (1 foot-pound = 1.355818e-15 petajoule). See the formula, worked examples, and conversion table.
Foot-pounds to Petajoules converter
Converter
Energy Converter
Convert joules, calories, kilowatt-hours, BTU, electronvolts, therms, and mechanical work units.
Context values
Some unit families need one extra value for a physically accurate result.
Petajoule is 1000000000000000 joule units.
Result = input x 1.355817948 / 1e+15.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Petajoules
Foot-pound and Petajoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Work from one pound-force over one foot, and petajoule is 1000000000000000 joule units.
Formula
petajoules = foot-pounds × 1.355818e-15
This factor comes from each unit's defined relationship to the category's base unit: 1 foot-pound equals 1.35581794833 base units, and 1 petajoule equals 1e+15 base units, so dividing one by the other gives the direct foot-pound-to-petajoule factor of 1.355818e-15.
Simple example
1 ft-lb × 1.355818e-15 = 1.355818e-15 PJ
1 foot-pound = 1.355818e-15 petajoules.
Real-world example
100 ft-lb × 1.355818e-15 = 1.355818e-13 PJ
100 foot-pounds = 1.355818e-13 petajoules.
Conversion table
| Foot-pound (ft-lb) | Petajoule (PJ) |
|---|---|
| 1 ft-lb | 1.355818e-15 PJ |
| 10 ft-lb | 1.355818e-14 PJ |
| 100 ft-lb | 1.355818e-13 PJ |
| 500 ft-lb | 6.77909e-13 PJ |
| 1,000 ft-lb | 1.355818e-12 PJ |
| 2,000 ft-lb | 2.711636e-12 PJ |
Reverse conversion: Petajoule to Foot-pound
1.355818e-15 PJ × 7.375621e+14 = 1.000000038 ft-lb
1.355818e-15 petajoules = 1.000000038 foot-pounds.
foot-pounds = petajoules × 7.375621e+14
For a page dedicated to this direction, see Petajoule to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Petajoule (PJ)
Petajoule is 1000000000000000 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many petajoules are in 1 foot-pound?
1 foot-pound equals 1.355818e-15 petajoules, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to petajoule?
Multiply the foot-pound value by 1.355818e-15. The converter above does this instantly to whatever precision you set.
How do I convert petajoule back to foot-pound?
Use the reverse factor: 1 petajoule equals 7.375621e+14 foot-pounds. You can also use the swap control in the converter above to flip the direction instantly.
What is a foot-pound?
Foot-pound (ft-lb) is a unit of energy.
What is a petajoule?
Petajoule (PJ) is a unit of energy.
Is the foot-pound to petajoule conversion exact?
Yes. Both foot-pound and petajoule are defined by fixed standards rather than physical artifacts, so the factor of 1.355818e-15 used above is exact to as many digits as you choose to display.