How to convert dBW to watts
W = 1 × 10^(dBW ÷ 10)Decibels are logarithmic. Divide the level by 10, raise 10 to that power, then multiply by the reference (1 W).
Worked examples
- −30 dBW−30 dBW → 0.001 W
- −3 dBW−3 dBW → 0.5011872336 W
- 6 dBW6 dBW → 3.981071706 W
- 30 dBW30 dBW → 1,000 W
- 50 dBW50 dBW → 100,000 W
DBW to watts conversion table
Values are calculated by the conversion engine using the full formula and rounded to 8 significant figures.
| DBW (dBW) | Watts (W) |
|---|---|
| −60 dBW | 0.000001 W |
| −40 dBW | 0.0001 W |
| −30 dBW | 0.001 W |
| −20 dBW | 0.01 W |
| −10 dBW | 0.1 W |
| −3 dBW | 0.50118723 W |
| 0 dBW | 1 W |
| 3 dBW | 1.9952623 W |
| 6 dBW | 3.9810717 W |
| 10 dBW | 10 W |
| DBW (dBW) | Watts (W) |
|---|---|
| 13 dBW | 19.952623 W |
| 20 dBW | 100 W |
| 23 dBW | 199.52623 W |
| 27 dBW | 501.18723 W |
| 30 dBW | 1,000 W |
| 33 dBW | 1,995.2623 W |
| 37 dBW | 5,011.8723 W |
| 40 dBW | 10,000 W |
| 50 dBW | 100,000 W |
| 60 dBW | 1,000,000 W |
About the units
Decibel-watt (dBW)
Power level relative to 1 W: dBW = dBm − 30. It is a logarithmic level: 0 dBW corresponds to 1 W.
Watt (W)
The watt (W) is a unit of power level (dbm, dbw) in the International System of Units (SI).
Frequently asked questions
What is the formula to convert dBW to watts?
W = 1 × 10^(dBW ÷ 10). Decibels are logarithmic. Divide the level by 10, raise 10 to that power, then multiply by the reference (1 W).
What is −3 dBW in watts?
−3 dBW = 0.5011872336 W.
Is this dBW to W converter accurate?
Yes. Both units are defined exactly in terms of SI units, so the conversion factor is exact; results are shown to 12 significant figures by default and you can change precision in the converter. Calculations run in your browser using the same tested engine that generated this page.