Zeptowatt is 1e-21 watt units.
Zeptowatts to Picowatts Converter — zW to pW
Convert Zeptowatt (zW) to Picowatt (pW) using the exact conversion factor (1 zeptowatt = 1e-9 picowatt). See the formula, worked examples, and conversion table.
Zeptowatts to Picowatts converter
Converter
Power Converter
Convert watts, horsepower, refrigeration tons, BTU per hour, and engineering power units.
Context values
Some unit families need one extra value for a physically accurate result.
Picowatt is 1e-12 watt units.
Result = input x 1e-21 / 1e-12.
Power uses the watt as the base unit.
Reserved above the conversion cards and below the converter.
About Converting Zeptowatts to Picowatts
Zeptowatt and Picowatt both describe power output, and the conversion is a routine part of comparing an engine or motor's spec sheet across countries that use different power units. Specifically: Zeptowatt is 1e-21 watt units, and picowatt is 1e-12 watt units.
Formula
picowatts = zeptowatts × 1e-9
This factor comes from each unit's defined relationship to the category's base unit: 1 zeptowatt equals 1e-21 base units, and 1 picowatt equals 1e-12 base units, so dividing one by the other gives the direct zeptowatt-to-picowatt factor of 1e-9.
Simple example
1 zW × 1e-9 = 1e-9 pW
1 zeptowatt = 1e-9 picowatts.
Real-world example
100 zW × 1e-9 = 1e-7 pW
100 zeptowatts = 1e-7 picowatts.
Conversion table
| Zeptowatt (zW) | Picowatt (pW) |
|---|---|
| 1 zW | 1e-9 pW |
| 10 zW | 1e-8 pW |
| 100 zW | 1e-7 pW |
| 500 zW | 5e-7 pW |
| 1,000 zW | 0.000001 pW |
| 5,000 zW | 0.000005 pW |
Reverse conversion: Picowatt to Zeptowatt
1e-9 pW × 1000000000 = 1 zW
1e-9 picowatts = 1 zeptowatts.
zeptowatts = picowatts × 1000000000
For a page dedicated to this direction, see Picowatt to Zeptowatt.
Understanding the Zeptowatt (zW)
Zeptowatt is 1e-21 watt units.
Understanding the Picowatt (pW)
Picowatt is 1e-12 watt units.
Reserved between the cards and the FAQ so the page stays balanced.
Frequently asked questions
How many picowatts are in 1 zeptowatt?
1 zeptowatt equals 1e-9 picowatts, using the exact defined conversion factor rather than an estimate.
How do I convert zeptowatt to picowatt?
Multiply the zeptowatt value by 1e-9. The converter above does this instantly to whatever precision you set.
How do I convert picowatt back to zeptowatt?
Use the reverse factor: 1 picowatt equals 1,000,000,000 zeptowatts. You can also use the swap control in the converter above to flip the direction instantly.
What is a zeptowatt?
Zeptowatt (zW) is a unit of power.
What is a picowatt?
Picowatt (pW) is a unit of power.
Is the zeptowatt to picowatt conversion exact?
Yes. Both zeptowatt and picowatt are defined by fixed standards rather than physical artifacts, so the factor of 1e-9 used above is exact to as many digits as you choose to display.