Zettajoule is 1e+21 joule units.
Zettajoules to Foot-pounds Converter — ZJ to ft-lb
Convert Zettajoule (ZJ) to Foot-pound (ft-lb) using the exact conversion factor (1 zettajoule = 7.375621e+20 foot-pound). See the formula, worked examples, and conversion table.
Zettajoules to Foot-pounds 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.
Work from one pound-force over one foot.
Result = input x 1e+21 / 1.355817948.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zettajoules to Foot-pounds
Zettajoule and Foot-pound both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Zettajoule is 1e+21 joule units, and work from one pound-force over one foot.
Formula
foot-pounds = zettajoules × 7.375621e+20
This factor comes from each unit's defined relationship to the category's base unit: 1 zettajoule equals 1e+21 base units, and 1 foot-pound equals 1.35581794833 base units, so dividing one by the other gives the direct zettajoule-to-foot-pound factor of 7.375621e+20.
Simple example
1 ZJ × 7.375621e+20 = 7.375621e+20 ft-lb
1 zettajoule = 7.375621e+20 foot-pounds.
Real-world example
100 ZJ × 7.375621e+20 = 7.375621e+22 ft-lb
100 zettajoules = 7.375621e+22 foot-pounds.
Conversion table
| Zettajoule (ZJ) | Foot-pound (ft-lb) |
|---|---|
| 1 ZJ | 7.375621e+20 ft-lb |
| 10 ZJ | 7.375621e+21 ft-lb |
| 100 ZJ | 7.375621e+22 ft-lb |
| 500 ZJ | 3.687811e+23 ft-lb |
| 1,000 ZJ | 7.375621e+23 ft-lb |
| 2,000 ZJ | 1.475124e+24 ft-lb |
Reverse conversion: Foot-pound to Zettajoule
7.375621e+20 ft-lb × 1.355818e-21 = 0.9999999332 ZJ
7.375621e+20 foot-pounds = 0.9999999332 zettajoules.
zettajoules = foot-pounds × 1.355818e-21
For a page dedicated to this direction, see Foot-pound to Zettajoule.
Understanding the Zettajoule (ZJ)
Zettajoule is 1e+21 joule units.
Understanding the Foot-pound (ft-lb)
Work from one pound-force over one foot.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many foot-pounds are in 1 zettajoule?
1 zettajoule equals 7.375621e+20 foot-pounds, using the exact defined conversion factor rather than an estimate.
How do I convert zettajoule to foot-pound?
Multiply the zettajoule value by 7.375621e+20. The converter above does this instantly to whatever precision you set.
How do I convert foot-pound back to zettajoule?
Use the reverse factor: 1 foot-pound equals 1.355818e-21 zettajoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a zettajoule?
Zettajoule (ZJ) is a unit of energy.
What is a foot-pound?
Foot-pound (ft-lb) is a unit of energy.
Is the zettajoule to foot-pound conversion exact?
Yes. Both zettajoule and foot-pound are defined by fixed standards rather than physical artifacts, so the factor of 7.375621e+20 used above is exact to as many digits as you choose to display.