Work from one pound-force over one foot.
Foot-pounds to Nanojoules Converter — ft-lb to nJ
Convert Foot-pound (ft-lb) to Nanojoule (nJ) using the exact conversion factor (1 foot-pound = 1,355,817,948 nanojoule). See the formula, worked examples, and conversion table.
Foot-pounds to Nanojoules 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.
Nanojoule is 1e-9 joule units.
Result = input x 1.355817948 / 1e-9.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Nanojoules
Foot-pound and Nanojoule 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 nanojoule is 1e-9 joule units.
Formula
nanojoules = foot-pounds × 1355817948.33
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 nanojoule equals 1e-9 base units, so dividing one by the other gives the direct foot-pound-to-nanojoule factor of 1355817948.33.
Simple example
1 ft-lb × 1355817948 = 1,355,817,948 nJ
1 foot-pound = 1,355,817,948 nanojoules.
Real-world example
100 ft-lb × 1355817948 = 135,581,794,800 nJ
100 foot-pounds = 135,581,794,800 nanojoules.
Conversion table
| Foot-pound (ft-lb) | Nanojoule (nJ) |
|---|---|
| 1 ft-lb | 1,355,817,948 nJ |
| 10 ft-lb | 13,558,179,480 nJ |
| 100 ft-lb | 135,581,794,800 nJ |
| 500 ft-lb | 677,908,974,200 nJ |
| 1,000 ft-lb | 1.355818e+12 nJ |
| 2,000 ft-lb | 2.711636e+12 nJ |
Reverse conversion: Nanojoule to Foot-pound
1 nJ × 7.375621e-10 = 7.375621e-10 ft-lb
1 nanojoule = 7.375621e-10 foot-pounds.
foot-pounds = nanojoules × 7.375621e-10
For a page dedicated to this direction, see Nanojoule to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Nanojoule (nJ)
Nanojoule is 1e-9 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many nanojoules are in 1 foot-pound?
1 foot-pound equals 1,355,817,948 nanojoules, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to nanojoule?
Multiply the foot-pound value by 1355817948. The converter above does this instantly to whatever precision you set.
How do I convert nanojoule back to foot-pound?
Use the reverse factor: 1 nanojoule equals 7.375621e-10 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 nanojoule?
Nanojoule (nJ) is a unit of energy.
Is the foot-pound to nanojoule conversion exact?
Yes. Both foot-pound and nanojoule are defined by fixed standards rather than physical artifacts, so the factor of 1355817948 used above is exact to as many digits as you choose to display.