Decibel-milliwatt to Milliwatt Converter
0 dBm is 1 mW. Convert decibel-milliwatts (dBm) to milliwatts (mW) below: type a value and the result updates as you type.
dBm to mW calculator
Result
Decibel-milliwatt to Milliwatt conversion
1 dBm ≈ 1.258925412 mWone decibel-milliwatt in milliwatts
1 mW = 0 dBmone milliwatt in decibel-milliwatts
Decibel-milliwatt (dBm): Power level relative to one milliwatt: 10 times the base-10 logarithm of the power in milliwatts. 0 dBm is 1 mW and 30 dBm is 1 W.
Milliwatt (mW): One thousandth of a watt.
Source:Decibel-milliwatt: IEC 60027-3:2002, Logarithmic and related quantities, and their units; Milliwatt: SI Brochure, 9th edition (BIPM, 2019)
How to convert decibel-milliwatts to milliwatts
To convert decibel-milliwatts to milliwatts, divide the level by 10, raise 10 to that power.
Formula
mW = 10^(dBm ÷ 10)
Examples
- 0 dBm = 10^(0 ÷ 10) = 1 mW
- 20 dBm = 10^(20 ÷ 10) = 100 mW
- 30 dBm = 10^(30 ÷ 10) = 1000 mW
Decibel-milliwatt to Milliwatt conversion table
| Decibel-milliwatt (dBm) | Milliwatt (mW) |
|---|---|
| -60 dBm | 0.000001 mW |
| -30 dBm | 0.001 mW |
| -20 dBm | 0.01 mW |
| -10 dBm | 0.1 mW |
| 0 dBm | 1 mW |
| 3 dBm | 1.995262315 mW |
| 10 dBm | 10 mW |
| 13 dBm | 19.95262315 mW |
| 20 dBm | 100 mW |
| 23 dBm | 199.5262315 mW |
| 30 dBm | 1000 mW |
| 40 dBm | 10000 mW |
| 50 dBm | 100000 mW |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- What is 0 dBm in mW?
- 0 dBm is 1 mW. To convert decibel-milliwatts to milliwatts, divide the level by 10, raise 10 to that power.
- How do I convert milliwatts to decibel-milliwatts?
- To convert milliwatts to decibel-milliwatts, take the base-10 logarithm of the amount, then multiply by 10. The formula is dBm = 10 × log₁₀(mW).
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 1 is exact. Displayed results are only rounded when they have many decimal places.