Watts to nanowatts converter
Convert watts (W) to nanowatts (nW). Calculate any value, follow the unit-factor steps and check a conversion table.
Updated · How we checkUse a decimal point, such as 2.5. Enter a value in W; the result is in nW.
Formula
Worked example
Convert 1 W to nW:
1 W ≈ 1,000,000,000 nW
Multiply your W value by the factor above. The calculator uses the full conversion factor before rounding the displayed answer.
Watts to nanowatts table
Reference values rounded to 10 significant digits. Use the converter above for other amounts.
| Watts (W) | Nanowatts (nW) |
|---|---|
| 0.1 | ≈ 100,000,000 |
| 0.5 | ≈ 500,000,000 |
| 1 | ≈ 1,000,000,000 |
| 2 | ≈ 2,000,000,000 |
| 5 | ≈ 5,000,000,000 |
| 10 | ≈ 10,000,000,000 |
| 25 | ≈ 25,000,000,000 |
| 50 | ≈ 50,000,000,000 |
| 100 | ≈ 100,000,000,000 |
| 1000 | ≈ 1e+12 |
What watts measure
Watts (W) represent power. One unit equals 10^0 W. One watt represents energy transfer at one joule per second.
Reading the result in nanowatts
Nanowatts (nW) represent power. One unit equals 10^-9 W. One watt represents energy transfer at one joule per second.
Where this conversion helps
Compare power ratings after expressing them in the same unit scale. A power rating does not specify energy consumption without runtime and loading. Input and output power may differ.
How the scale changes
The input unit has a factor of 1e0 W; the output unit has a factor of 1e-9 W. Multiply the entered number by the input factor, then divide by the output factor. The physical quantity stays the same while its numerical representation changes.
Reading very small or large results
Scientific notation keeps very small and large values readable: 2.5e-6 means 0.0000025. The converter calculates with 50 significant digits internally and displays up to 10. Exact unit definitions do not remove uncertainty from the original measurement.
References
Definitions and method references. Example rates and prices on this page are editable assumptions.