Picojoule is 1e-12 joule units.
Picojoules to Attojoules Converter — pJ to aJ
Convert Picojoule (pJ) to Attojoule (aJ) using the exact conversion factor (1 picojoule = 1,000,000 attojoule). See the formula, worked examples, and conversion table.
Picojoules to Attojoules 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.
Attojoule is 1e-18 joule units.
Result = input x 1e-12 / 1e-18.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Picojoules to Attojoules
Picojoule and Attojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Picojoule is 1e-12 joule units, and attojoule is 1e-18 joule units.
Formula
attojoules = picojoules × 1000000
This factor comes from each unit's defined relationship to the category's base unit: 1 picojoule equals 1e-12 base units, and 1 attojoule equals 1e-18 base units, so dividing one by the other gives the direct picojoule-to-attojoule factor of 1000000.
Simple example
1 pJ × 1000000 = 1,000,000 aJ
1 picojoule = 1,000,000 attojoules.
Real-world example
100 pJ × 1000000 = 100,000,000 aJ
100 picojoules = 100,000,000 attojoules.
Conversion table
| Picojoule (pJ) | Attojoule (aJ) |
|---|---|
| 1 pJ | 1,000,000 aJ |
| 10 pJ | 10,000,000 aJ |
| 100 pJ | 100,000,000 aJ |
| 500 pJ | 500,000,000 aJ |
| 1,000 pJ | 1,000,000,000 aJ |
| 2,000 pJ | 2,000,000,000 aJ |
Reverse conversion: Attojoule to Picojoule
1 aJ × 0.000001 = 0.000001 pJ
1 attojoule = 0.000001 picojoules.
picojoules = attojoules × 0.000001
For a page dedicated to this direction, see Attojoule to Picojoule.
Understanding the Picojoule (pJ)
Picojoule is 1e-12 joule units.
Understanding the Attojoule (aJ)
Attojoule is 1e-18 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many attojoules are in 1 picojoule?
1 picojoule equals 1,000,000 attojoules, using the exact defined conversion factor rather than an estimate.
How do I convert picojoule to attojoule?
Multiply the picojoule value by 1000000. The converter above does this instantly to whatever precision you set.
How do I convert attojoule back to picojoule?
Use the reverse factor: 1 attojoule equals 0.000001 picojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a picojoule?
Picojoule (pJ) is a unit of energy.
What is a attojoule?
Attojoule (aJ) is a unit of energy.
Is the picojoule to attojoule conversion exact?
Yes. Both picojoule and attojoule are defined by fixed standards rather than physical artifacts, so the factor of 1000000 used above is exact to as many digits as you choose to display.