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Enter your value above to convert femtowatts to watts or vice versa.
Real-World Examples
The Uses of Femtowatts to Watts Conversion
The femtowatt is the scale gravitational wave detectors and single-molecule biophysics experiments operate at, so this conversion is most useful when folding those figures into an overall watt-based analysis.
Characterizing Gravitational Wave Detector Noise Power
Physicists operating gravitational wave observatories who budget the detector's overall power systems in watts convert the instrument's thermal noise power, at the femtowatt scale, into watts to assess detection sensitivity.
Measuring Single-Molecule Fluorescence Detection Power
Biophysicists detecting the faint light emitted by single fluorescent molecules, at the femtowatt scale, convert the figure into watts to compare against their detector's overall sensitivity specifications.
Tracking Quantum Noise Floors in Ultra-Sensitive Instruments
Quantum metrology researchers who calculate an instrument's overall power budget in watts convert the fundamental quantum noise floor, at the femtowatt scale, into watts to assess the theoretical measurement limit.
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 fW to W | 100,000,000,000,000 × 1e-15 | 0.10 W |
| 5e+14 fW to W | 5e+14 × 1e-15 | 0.50 W |
| 1e+15 fW to W | 1e+15 × 1e-15 | 1.00 W |
| 2e+15 fW to W | 2e+15 × 1e-15 | 2.00 W |
| 5,000,000,000,000,000 fW to W | 5,000,000,000,000,000 × 1e-15 | 5.00 W |
| 10,000,000,000,000,000 fW to W | 10,000,000,000,000,000 × 1e-15 | 10.00 W |
| 50,000,000,000,000,000 fW to W | 50,000,000,000,000,000 × 1e-15 | 50.00 W |
| 100,000,000,000,000,000 fW to W | 100,000,000,000,000,000 × 1e-15 | 100.00 W |
| 499,999,999,999,999,936 fW to W | 499,999,999,999,999,936 × 1e-15 | 500.00 W |
Got Questions?
Frequently Asked Questions
How many watts are in 1 femtowatt?
1 femtowatt equals 1e-15 watts, a figure useful for anyone working at the gravitational wave detector and extreme-sensitivity instrumentation scale.
How many femtowatts are in 1 watt?
1 watt equals approximately 1e+15 femtowatts, which puts the size of a single watt into perspective against the femtowatt.
Why would anyone convert femtowatts to watts?
This comes up in gravitational wave physics and single-molecule biophysics, where extraordinarily faint noise or signal powers at the femtowatt scale need to be folded into a watt-based instrument analysis.
Is a femtowatt a large or small fraction of a watt?
An almost incomprehensibly small fraction. 1 femtowatt equals exactly 0.000000000000001 watts, since the femtowatt is one-quadrillionth of a watt by definition.