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Enter your value above to convert attowatts to watts or vice versa.
Real-World Examples
The Uses of Attowatts to Watts Conversion
The attowatt is an almost unimaginably small unit used in theoretical physics, so this conversion mostly comes up when comparing a fundamental limit figure against real, measurable power levels.
Estimating Single-Particle Interaction Power in Theoretical Physics
Theoretical physicists modeling the power associated with individual particle interactions, often estimated at the attowatt scale, convert the figure into watts to compare against macroscopic, lab-measurable power levels.
Framing Fundamental Quantum Measurement Limits
Quantum metrology theorists calculating the fundamental power limit imposed by quantum mechanics on an idealized measurement, often at the attowatt scale, convert the figure into watts for comparison with real instrument noise floors.
Contextualizing Attowatt-Scale Figures in Physics Education
Physics educators illustrating just how small modern measurement science can go sometimes convert an attowatt-scale theoretical figure into watts to show students the enormous scale gap between quantum and everyday power levels.
Quick Reference
Comprehensive Conversion Table
Our quick table gives you instant results, so you don't have to calculate these common values manually.
| Conversion | Formula | Result (W) |
|---|---|---|
| 100,000,000,000,000,000 aW to W | 100,000,000,000,000,000 × 1e-18 | 0.10 W |
| 499,999,999,999,999,936 aW to W | 499,999,999,999,999,936 × 1e-18 | 0.50 W |
| 999,999,999,999,999,872 aW to W | 999,999,999,999,999,872 × 1e-18 | 1.00 W |
| 1,999,999,999,999,999,744 aW to W | 1,999,999,999,999,999,744 × 1e-18 | 2.00 W |
| 5,000,000,000,000,000,000 aW to W | 5,000,000,000,000,000,000 × 1e-18 | 5.00 W |
| 10,000,000,000,000,000,000 aW to W | 10,000,000,000,000,000,000 × 1e-18 | 10.00 W |
| 50,000,000,000,000,000,000 aW to W | 50,000,000,000,000,000,000 × 1e-18 | 50.00 W |
| 100,000,000,000,000,000,000 aW to W | 100,000,000,000,000,000,000 × 1e-18 | 100.00 W |
| 499,999,999,999,999,934,464 aW to W | 499,999,999,999,999,934,464 × 1e-18 | 500.00 W |
Got Questions?
Frequently Asked Questions
How many watts are in 1 attowatt?
1 attowatt equals 1e-18 watts, a figure useful for anyone working at the theoretical single-particle and fundamental-limit physics research scale.
How many attowatts are in 1 watt?
1 watt equals approximately 1e+18 attowatts, which puts the size of a single watt into perspective against the attowatt.
Why would anyone convert attowatts to watts?
This conversion almost never comes up outside theoretical physics, where fundamental power limits or single-particle interaction estimates at the attowatt scale need to be compared against real, measurable watt-scale power.
Is an attowatt a large or small fraction of a watt?
An almost unimaginably small fraction. 1 attowatt equals exactly 0.000000000000000001 watts, since the attowatt is one-quintillionth of a watt by definition.