Work from one pound-force over one foot.
Foot-pounds to Decajoules Converter — ft-lb to daJ
Convert Foot-pound (ft-lb) to Decajoule (daJ) using the exact conversion factor (1 foot-pound = 0.1355817948 decajoule). See the formula, worked examples, and conversion table.
Foot-pounds to Decajoules 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.
Decajoule is 10 joule units.
Result = input x 1.355817948 / 10.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Decajoules
Foot-pound and Decajoule 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 decajoule is 10 joule units.
Formula
decajoules = foot-pounds × 0.135581794833
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 decajoule equals 10 base units, so dividing one by the other gives the direct foot-pound-to-decajoule factor of 0.135581794833.
Simple example
1 ft-lb × 0.1355817948 = 0.1355817948 daJ
1 foot-pound = 0.1355817948 decajoules.
Real-world example
100 ft-lb × 0.1355817948 = 13.55817948 daJ
100 foot-pounds = 13.55817948 decajoules.
Conversion table
| Foot-pound (ft-lb) | Decajoule (daJ) |
|---|---|
| 1 ft-lb | 0.1355817948 daJ |
| 10 ft-lb | 1.355817948 daJ |
| 50 ft-lb | 6.779089742 daJ |
| 100 ft-lb | 13.55817948 daJ |
| 500 ft-lb | 67.79089742 daJ |
| 1,000 ft-lb | 135.5817948 daJ |
Reverse conversion: Decajoule to Foot-pound
0.1355817948 daJ × 7.375621493 = 0.9999999998 ft-lb
0.1355817948 decajoules = 0.9999999998 foot-pounds.
foot-pounds = decajoules × 7.37562149277
For a page dedicated to this direction, see Decajoule to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Decajoule (daJ)
Decajoule is 10 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many decajoules are in 1 foot-pound?
1 foot-pound equals 0.1355817948 decajoules, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to decajoule?
Multiply the foot-pound value by 0.1355817948. The converter above does this instantly to whatever precision you set.
How do I convert decajoule back to foot-pound?
Use the reverse factor: 1 decajoule equals 7.375621493 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 decajoule?
Decajoule (daJ) is a unit of engineering.
Is the foot-pound to decajoule conversion exact?
Yes. Both foot-pound and decajoule are defined by fixed standards rather than physical artifacts, so the factor of 0.1355817948 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.