Attojoule is 1e-18 joule units.
Attojoules to Picojoules Converter — aJ to pJ
Convert Attojoule (aJ) to Picojoule (pJ) using the exact conversion factor (1 attojoule = 0.000001 picojoule). See the formula, worked examples, and conversion table.
Attojoules to Picojoules 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.
Picojoule is 1e-12 joule units.
Result = input x 1e-18 / 1e-12.
Energy uses the joule as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Attojoules to Picojoules
Attojoule and Picojoule both measure energy, and the conversion is especially useful for comparing nutrition labels (kilocalories) against scientific energy figures (joules). Specifically: Attojoule is 1e-18 joule units, and picojoule is 1e-12 joule units.
Formula
picojoules = attojoules × 0.000001
This factor comes from each unit's defined relationship to the category's base unit: 1 attojoule equals 1e-18 base units, and 1 picojoule equals 1e-12 base units, so dividing one by the other gives the direct attojoule-to-picojoule factor of 0.000001.
Simple example
1 aJ × 0.000001 = 0.000001 pJ
1 attojoule = 0.000001 picojoules.
Real-world example
100 aJ × 0.000001 = 0.0001 pJ
100 attojoules = 0.0001 picojoules.
Conversion table
| Attojoule (aJ) | Picojoule (pJ) |
|---|---|
| 1 aJ | 0.000001 pJ |
| 10 aJ | 0.00001 pJ |
| 100 aJ | 0.0001 pJ |
| 500 aJ | 0.0005 pJ |
| 1,000 aJ | 0.001 pJ |
| 2,000 aJ | 0.002 pJ |
Reverse conversion: Picojoule to Attojoule
0.000001 pJ × 1000000 = 1 aJ
0.000001 picojoules = 1 attojoules.
attojoules = picojoules × 1000000
For a page dedicated to this direction, see Picojoule to Attojoule.
Understanding the Attojoule (aJ)
Attojoule is 1e-18 joule units.
Understanding the Picojoule (pJ)
Picojoule is 1e-12 joule units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many picojoules are in 1 attojoule?
1 attojoule equals 0.000001 picojoules, using the exact defined conversion factor rather than an estimate.
How do I convert attojoule to picojoule?
Multiply the attojoule value by 0.000001. The converter above does this instantly to whatever precision you set.
How do I convert picojoule back to attojoule?
Use the reverse factor: 1 picojoule equals 1,000,000 attojoules. You can also use the swap control in the converter above to flip the direction instantly.
What is a attojoule?
Attojoule (aJ) is a unit of energy.
What is a picojoule?
Picojoule (pJ) is a unit of energy.
Is the attojoule to picojoule conversion exact?
Yes. Both attojoule and picojoule are defined by fixed standards rather than physical artifacts, so the factor of 0.000001 used above is exact to as many digits as you choose to display.