Microwatt to Decibel-milliwatt Converter
1 µW is -30 dBm. Convert microwatts (µW) to decibel-milliwatts (dBm) below: type a value and the result updates as you type.
µW to dBm calculator
Result
Microwatt to Decibel-milliwatt conversion
1 µW = -30 dBmone microwatt in decibel-milliwatts
1 dBm ≈ 1258.925412 µWone decibel-milliwatt in microwatts
Microwatt (µW): One millionth of a watt.
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.
Source:Microwatt: SI Brochure, 9th edition (BIPM, 2019); Decibel-milliwatt: IEC 60027-3:2002, Logarithmic and related quantities, and their units
How to convert microwatts to decibel-milliwatts
To convert microwatts to decibel-milliwatts, divide the amount by 1000, take the base-10 logarithm, then multiply by 10.
Formula
dBm = 10 × log₁₀(µW ÷ 1000)
Examples
- 1 µW = 10 × log₁₀(1 ÷ 1000) = -30 dBm
- 10 µW = 10 × log₁₀(10 ÷ 1000) = -20 dBm
- 1000 µW = 10 × log₁₀(1000 ÷ 1000) = 0 dBm
Microwatt to Decibel-milliwatt conversion table
| Microwatt (µW) | Decibel-milliwatt (dBm) |
|---|---|
| 0.001 µW | -60 dBm |
| 0.01 µW | -50 dBm |
| 0.1 µW | -40 dBm |
| 1 µW | -30 dBm |
| 10 µW | -20 dBm |
| 100 µW | -10 dBm |
| 1000 µW | 0 dBm |
Values rounded to 10 significant digits where needed.
Frequently asked questions
- What is 1 µW in dBm?
- 1 µW is -30 dBm. To convert microwatts to decibel-milliwatts, divide the amount by 1000, take the base-10 logarithm, then multiply by 10.
- How do I convert decibel-milliwatts to microwatts?
- To convert decibel-milliwatts to microwatts, divide the level by 10, raise 10 to that power, then multiply by 1000. The formula is µW = 1000 × 10^(dBm ÷ 10).
- Is this conversion exact?
- Yes. Both units have exact definitions and the factor 1000 is exact. Displayed results are only rounded when they have many decimal places.