Live Converter
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Enter your value above to convert watts to attowatts or vice versa.
Real-World Examples
The Uses of Watts to Attowatts Conversion
Everyday or instrument-scale watt figures are far too large to directly compare against attowatt-scale theoretical limits, so this conversion helps place both figures on the same scale.
Translating Theoretical Power Limits for Instrument Design
Instrument designers who read a theoretical fundamental power limit expressed in watts convert it into attowatts to compare against the extreme sensitivity goals of next-generation detectors.
Scaling Real Instrument Noise Floors to Attowatt Comparisons
Researchers who measure a real instrument's noise floor in watts convert it into attowatts to compare against purely theoretical fundamental quantum limits discussed in physics papers.
Contextualizing Classroom Scale Comparisons
Educators who want to illustrate the attowatt scale convert an everyday watt figure into attowatts to show students just how enormous the gap is between household power and quantum-scale power.
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 (aW) |
|---|---|---|
| 1 W to aW | 1 × 9.999999999999999e+17 | 999,999,999,999,999,872.00 aW |
| 2 W to aW | 2 × 9.999999999999999e+17 | 1,999,999,999,999,999,744.00 aW |
| 3 W to aW | 3 × 9.999999999999999e+17 | 2,999,999,999,999,999,488.00 aW |
| 5 W to aW | 5 × 9.999999999999999e+17 | 4,999,999,999,999,998,976.00 aW |
| 10 W to aW | 10 × 9.999999999999999e+17 | 9,999,999,999,999,997,952.00 aW |
| 20 W to aW | 20 × 9.999999999999999e+17 | 19,999,999,999,999,995,904.00 aW |
| 50 W to aW | 50 × 9.999999999999999e+17 | 49,999,999,999,999,991,808.00 aW |
| 100 W to aW | 100 × 9.999999999999999e+17 | 99,999,999,999,999,983,616.00 aW |
| 500 W to aW | 500 × 9.999999999999999e+17 | 499,999,999,999,999,934,464.00 aW |
Got Questions?
Frequently Asked Questions
What's a quick way to size up what 1 watt means in attowatts?
It helps to know that 1 watt comes out to roughly 1e+18 attowatts, which puts the size of a single watt into perspective against the attowatt.
How many watts make up 1 attowatt?
It takes exactly 1e-18 watts to equal 1 attowatt, a ratio worth knowing when working at the theoretical single-particle and fundamental-limit physics research scale.
Why are single-particle power estimates given in attowatts?
Attowatts give theoretical physicists a precise figure for power levels so far below everyday measurement that even a femtowatt would already be a comparatively enormous amount by contrast.
How many attowatts does it take to add up to 1 watt?
It takes exactly 1,000,000,000,000,000,000 attowatts combined to equal a single watt, illustrating just how far removed this unit is from everyday power levels.