Work from one pound-force over one foot.
Foot-pounds to Centijoules Converter — ft-lb to cJ
Convert Foot-pound (ft-lb) to Centijoule (cJ) using the exact conversion factor (1 foot-pound = 135.5817948 centijoule). See the formula, worked examples, and conversion table.
Foot-pounds to Centijoules 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.
Centijoule is 0.01 joule units.
Result = input x 1.355817948 / 0.01.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Centijoules
Foot-pound and Centijoule 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 centijoule is 0.01 joule units.
Formula
centijoules = foot-pounds × 135.581794833
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 centijoule equals 0.01 base units, so dividing one by the other gives the direct foot-pound-to-centijoule factor of 135.581794833.
Simple example
1 ft-lb × 135.5817948 = 135.5817948 cJ
1 foot-pound = 135.5817948 centijoules.
Real-world example
100 ft-lb × 135.5817948 = 13,558.17948 cJ
100 foot-pounds = 13,558.17948 centijoules.
Conversion table
| Foot-pound (ft-lb) | Centijoule (cJ) |
|---|---|
| 1 ft-lb | 135.5817948 cJ |
| 10 ft-lb | 1,355.817948 cJ |
| 50 ft-lb | 6,779.089742 cJ |
| 100 ft-lb | 13,558.17948 cJ |
| 500 ft-lb | 67,790.89742 cJ |
| 1,000 ft-lb | 135,581.7948 cJ |
Reverse conversion: Centijoule to Foot-pound
135.5817948 cJ × 0.007375621493 = 0.9999999998 ft-lb
135.5817948 centijoules = 0.9999999998 foot-pounds.
foot-pounds = centijoules × 0.00737562149277
For a page dedicated to this direction, see Centijoule to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Centijoule (cJ)
Centijoule is 0.01 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many centijoules are in 1 foot-pound?
1 foot-pound equals 135.5817948 centijoules, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to centijoule?
Multiply the foot-pound value by 135.5817948. The converter above does this instantly to whatever precision you set.
How do I convert centijoule back to foot-pound?
Use the reverse factor: 1 centijoule equals 0.0073756215 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 centijoule?
Centijoule (cJ) is a unit of engineering.
Is the foot-pound to centijoule conversion exact?
Yes. Both foot-pound and centijoule are defined by fixed standards rather than physical artifacts, so the factor of 135.5817948 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.