Work from one pound-force over one foot.
Foot-pounds to Quettajoules Converter — ft-lb to QJ
Convert Foot-pound (ft-lb) to Quettajoule (QJ) using the exact conversion factor (1 foot-pound = 1.355818e-30 quettajoule). See the formula, worked examples, and conversion table.
Foot-pounds to Quettajoules 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.
Quettajoule is 1e+30 joule units.
Result = input x 1.355817948 / 1e+30.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Foot-pounds to Quettajoules
Foot-pound and Quettajoule 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 quettajoule is 1e+30 joule units.
Formula
quettajoules = foot-pounds × 1.355818e-30
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 quettajoule equals 1e+30 base units, so dividing one by the other gives the direct foot-pound-to-quettajoule factor of 1.355818e-30.
Simple example
1 ft-lb × 1.355818e-30 = 1.355818e-30 QJ
1 foot-pound = 1.355818e-30 quettajoules.
Real-world example
100 ft-lb × 1.355818e-30 = 1.355818e-28 QJ
100 foot-pounds = 1.355818e-28 quettajoules.
Conversion table
| Foot-pound (ft-lb) | Quettajoule (QJ) |
|---|---|
| 1 ft-lb | 1.355818e-30 QJ |
| 10 ft-lb | 1.355818e-29 QJ |
| 100 ft-lb | 1.355818e-28 QJ |
| 500 ft-lb | 6.77909e-28 QJ |
| 1,000 ft-lb | 1.355818e-27 QJ |
| 2,000 ft-lb | 2.711636e-27 QJ |
Reverse conversion: Quettajoule to Foot-pound
1.355818e-30 QJ × 7.375621e+29 = 1.000000038 ft-lb
1.355818e-30 quettajoules = 1.000000038 foot-pounds.
foot-pounds = quettajoules × 7.375621e+29
For a page dedicated to this direction, see Quettajoule to Foot-pound.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Understanding the Quettajoule (QJ)
Quettajoule is 1e+30 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many quettajoules are in 1 foot-pound?
1 foot-pound equals 1.355818e-30 quettajoules, using the exact defined conversion factor rather than an estimate.
How do I convert foot-pound to quettajoule?
Multiply the foot-pound value by 1.355818e-30. The converter above does this instantly to whatever precision you set.
How do I convert quettajoule back to foot-pound?
Use the reverse factor: 1 quettajoule equals 7.375621e+29 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 quettajoule?
Quettajoule (QJ) is a unit of energy.
Is the foot-pound to quettajoule conversion exact?
Yes. Both foot-pound and quettajoule are defined by fixed standards rather than physical artifacts, so the factor of 1.355818e-30 used above is exact to as many digits as you choose to display.