Work from one pound-force over one foot.
Foot-pounds to Ergs Converter — ft-lb to erg
Convert Foot-pound (ft-lb) to Erg (erg) using the exact conversion factor (1 foot-pound = 13,558,179.48 erg). See the formula, worked examples, and conversion table.
Foot-pounds to Ergs 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.
An erg is a CGS energy unit.
Result = input x 1.355817948 / 1e-7.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Ergs
Foot-pound and Erg 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 an erg is a CGS energy unit.
Formula
ergs = foot-pounds × 13558179.4833
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 erg equals 1e-7 base units, so dividing one by the other gives the direct foot-pound-to-erg factor of 13558179.4833.
Simple example
1 ft-lb × 13558179.48 = 13,558,179.48 erg
1 foot-pound = 13,558,179.48 ergs.
Real-world example
100 ft-lb × 13558179.48 = 1,355,817,948 erg
100 foot-pounds = 1,355,817,948 ergs.
Conversion table
| Foot-pound (ft-lb) | Erg (erg) |
|---|---|
| 1 ft-lb | 13,558,179.48 erg |
| 10 ft-lb | 135,581,794.8 erg |
| 100 ft-lb | 1,355,817,948 erg |
| 500 ft-lb | 6,779,089,742 erg |
| 1,000 ft-lb | 13,558,179,480 erg |
| 2,000 ft-lb | 27,116,358,970 erg |
Reverse conversion: Erg to Foot-pound
1 erg × 7.375621e-8 = 7.375621e-8 ft-lb
1 erg = 7.375621e-8 foot-pounds.
foot-pounds = ergs × 7.375621e-8
For a page dedicated to this direction, see Erg to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Erg (erg)
An erg is a CGS energy unit.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many ergs are in 1 foot-pound?
1 foot-pound equals 13,558,179.48 ergs, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to erg?
Multiply the foot-pound value by 13558179.48. The converter above does this instantly to whatever precision you set.
How do I convert erg back to foot-pound?
Use the reverse factor: 1 erg equals 7.375621e-8 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 erg?
Erg (erg) is a unit of energy.
Is the foot-pound to erg conversion exact?
Yes. Both foot-pound and erg are defined by fixed standards rather than physical artifacts, so the factor of 13558179.48 used above is exact to as many digits as you choose to display.