dBm ⇄ mW ⇄ Voltage Converter
Convert between power level, milliwatts, RMS and peak-to-peak voltage (50Ω/75Ω selectable) — transmit power, receiver sensitivity and attenuation chains alike.
Key points
dBm ⇄ mW ⇄ Voltage Converter: Convert between power level, milliwatts, RMS and peak-to-peak voltage (50Ω/75Ω selectable) — transmit power, receiver sensitivity and attenuation chains alike. Formula: P(dBm) = 10·log₁₀(P/1mW) ｜ V_rms = √(P·Z₀). Enter parameters on the DD-CAT IDE online tool page to get results instantly, with a calculation-model diagram that updates with the inputs. Reference points: 0dBm = 1mW = 0.224Vrms at 50Ω; +30dBm = 1W; −70dBm is about 71µVrms. Link budgets add in dB: TX power − cable loss + antenna gain − free-space loss + RX gain = received level.
Inputs
P(dBm) = 10·log₁₀(P/1mW) ｜ V_rms = √(P·Z₀)Calculation model (updates with parameters)
| Power level | 0.00 dBm | |
| Power | 1 mW（1.0000 mW） | |
| dBW | -30.00 dBW | |
| Voltage V_rms | 223.6 mV | 按所选 50Ω Calculate |
| Voltage V_pp | 632.5 mV | |
| Peak voltage V_p | 316.2 mV | |
| Equivalent current I_rms | 4.472 mA |
Engineering notes
- Reference points: 0dBm = 1mW = 0.224Vrms at 50Ω; +30dBm = 1W; −70dBm is about 71µVrms.
- Link budgets add in dB: TX power − cable loss + antenna gain − free-space loss + RX gain = received level.
FAQ
- What is dBm ⇄ mW ⇄ Voltage Converter for?
- Convert between power level, milliwatts, RMS and peak-to-peak voltage (50Ω/75Ω selectable) — transmit power, receiver sensitivity and attenuation chains alike.
- What is the formula for dBm ⇄ mW ⇄ Voltage Converter?
- Core formula: P(dBm) = 10·log₁₀(P/1mW) ｜ V_rms = √(P·Z₀). The tool returns results instantly using this formula and the selected parameters.
- What engineering notes should I keep in mind when using dBm ⇄ mW ⇄ Voltage Converter?
- Reference points: 0dBm = 1mW = 0.224Vrms at 50Ω; +30dBm = 1W; −70dBm is about 71µVrms. Link budgets add in dB: TX power − cable loss + antenna gain − free-space loss + RX gain = received level.