Work from one pound-force over one foot.
Foot-pounds to Hectojoules Converter — ft-lb to hJ
Convert Foot-pound (ft-lb) to Hectojoule (hJ) using the exact conversion factor (1 foot-pound = 0.0135581795 hectojoule). See the formula, worked examples, and conversion table.
Foot-pounds to Hectojoules converter
Converter
Engineering Converter
Convert common stress, force, torque, power, and energy units used in engineering.
Context values
Some unit families need one extra value for a physically accurate result.
Hectojoule is 100 joule units.
Result = input x 1.355817948 / 100.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Hectojoules
Foot-pound and Hectojoule both measure a quantity used in structural or mechanical engineering — commonly stress, pressure, force, torque, power, or energy — where converting between the unit conventions used in different regions, industries, or equipment specifications is a routine part of design work. Specifically: Work from one pound-force over one foot, and hectojoule is 100 joule units.
Formula
hectojoules = foot-pounds × 0.0135581794833
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 hectojoule equals 100 base units, so dividing one by the other gives the direct foot-pound-to-hectojoule factor of 0.0135581794833.
Simple example
1 ft-lb × 0.01355817948 = 0.0135581795 hJ
1 foot-pound = 0.0135581795 hectojoules.
Real-world example
100 ft-lb × 0.01355817948 = 1.355817948 hJ
100 foot-pounds = 1.355817948 hectojoules.
Conversion table
| Foot-pound (ft-lb) | Hectojoule (hJ) |
|---|---|
| 1 ft-lb | 0.0135581795 hJ |
| 10 ft-lb | 0.1355817948 hJ |
| 50 ft-lb | 0.6779089742 hJ |
| 100 ft-lb | 1.355817948 hJ |
| 500 ft-lb | 6.779089742 hJ |
| 1,000 ft-lb | 13.55817948 hJ |
Reverse conversion: Hectojoule to Foot-pound
0.0135581795 hJ × 73.75621493 = 1.000000001 ft-lb
0.0135581795 hectojoules = 1.000000001 foot-pounds.
foot-pounds = hectojoules × 73.7562149277
For a page dedicated to this direction, see Hectojoule to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Hectojoule (hJ)
Hectojoule is 100 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many hectojoules are in 1 foot-pound?
1 foot-pound equals 0.0135581795 hectojoules, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to hectojoule?
Multiply the foot-pound value by 0.01355817948. The converter above does this instantly to whatever precision you set.
How do I convert hectojoule back to foot-pound?
Use the reverse factor: 1 hectojoule equals 73.75621493 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 engineering.
What is a hectojoule?
Hectojoule (hJ) is a unit of engineering.
Is the foot-pound to hectojoule conversion exact?
Yes. Both foot-pound and hectojoule are defined by fixed standards rather than physical artifacts, so the factor of 0.01355817948 used above is exact to as many digits as you choose to display.
Why do engineering unit conventions vary so much by region and industry?
Pressure, force, and stress can be expressed in metric (pascal, newton), US customary (psi, pound-force), or older and industry-specific units (atmosphere, torr, kip) depending on the country, industry, and even the equipment manufacturer, which is why engineers routinely need to convert between them when working across specs from different sources.