Work from one pound-force over one foot.
Foot-pounds to Microjoules Converter — ft-lb to uJ
Convert Foot-pound (ft-lb) to Microjoule (uJ) using the exact conversion factor (1 foot-pound = 1,355,817.948 microjoule). See the formula, worked examples, and conversion table.
Foot-pounds to Microjoules 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.
Microjoule is 0.000001 joule units.
Result = input x 1.355817948 / 1e-6.
Energy units are compatible.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Microjoules
Foot-pound and Microjoule 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 microjoule is 0.000001 joule units.
Formula
microjoules = foot-pounds × 1355817.94833
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 microjoule equals 0.000001 base units, so dividing one by the other gives the direct foot-pound-to-microjoule factor of 1355817.94833.
Simple example
1 ft-lb × 1355817.948 = 1,355,817.948 uJ
1 foot-pound = 1,355,817.948 microjoules.
Real-world example
100 ft-lb × 1355817.948 = 135,581,794.8 uJ
100 foot-pounds = 135,581,794.8 microjoules.
Conversion table
| Foot-pound (ft-lb) | Microjoule (uJ) |
|---|---|
| 1 ft-lb | 1,355,817.948 uJ |
| 10 ft-lb | 13,558,179.48 uJ |
| 50 ft-lb | 67,790,897.42 uJ |
| 100 ft-lb | 135,581,794.8 uJ |
| 500 ft-lb | 677,908,974.2 uJ |
| 1,000 ft-lb | 1,355,817,948 uJ |
Reverse conversion: Microjoule to Foot-pound
1 uJ × 7.375621e-7 = 7.375621e-7 ft-lb
1 microjoule = 7.375621e-7 foot-pounds.
foot-pounds = microjoules × 7.375621e-7
For a page dedicated to this direction, see Microjoule to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Microjoule (uJ)
Microjoule is 0.000001 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many microjoules are in 1 foot-pound?
1 foot-pound equals 1,355,817.948 microjoules, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to microjoule?
Multiply the foot-pound value by 1355817.948. The converter above does this instantly to whatever precision you set.
How do I convert microjoule back to foot-pound?
Use the reverse factor: 1 microjoule equals 7.375621e-7 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 microjoule?
Microjoule (uJ) is a unit of engineering.
Is the foot-pound to microjoule conversion exact?
Yes. Both foot-pound and microjoule are defined by fixed standards rather than physical artifacts, so the factor of 1355817.948 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.