dBm to dBmV Conversion Calculator

Enter value and click “Convert” to find its conversion. For future easy reference,
Press Ctrl+D (Cmd+D for Mac) to bookmark this page




Convert dBm to dBmV

Our dBm to dBmV conversion calculator tool helps you convert dBm value (decibels-milliwatts) to dBmV (decibels-microvolts) value easily. Whether you’re working in signal processing, telecommunications or any other field that requires precise power measurements, this calculator is here for you.

Understanding the dBm to dBmV Conversion

What is dBm?

dBm, or decibels-milliwatts, is a unit of power level referenced to 1 milliwatt. It is commonly used in RF (radio frequency) and audio applications to measure the absolute power level.

What is dBmV?

dBmV, or decibels-microvolts, is a unit of voltage level referenced to 1 microvolt. It is often used in cable television and signal processing to measure signal strength.

Conversion Formula

To convert from dBm to dBmV, you can use the following formula:


Where Z0​ is the impedance in ohms (Ω).

Practical Example

Let’s go through an example to see how this conversion works in practice.


Imagine you have a power level of 10 dBm, and your system impedance (Z0​) is 50 ohms. To convert this to dBmV, follow these steps:

Calculate the square root of the impedance:


Calculate the logarithm of the square root of the impedance:


Apply the formula:


So, 10 dBm is approximately 56.98 dBmV for an impedance of 50 ohms.

Use Our Calculator

Our dBm to dBmV calculator simplifies this process for you. Just enter your dBm value and the impedance (Z0​), and the calculator will do the rest, providing you with an accurate dBmV value instantly.

Frequently Asked Questions

1. Why is impedance (Z0) important in this calculation?

Impedance is a key factor in determining the relationship between power and voltage levels.
Different systems may have different impedance values, affecting the conversion between dBm and dBmV.

2. What are common values for Z0​ in different applications?

RF systems often use 50 ohms.
Cable television systems typically use 75 ohms.

3. Can I use this calculator for any impedance value?

Yes, our calculator allows you to input any Z0​ value to perform the conversion accurately.


Converting dBm to dBmV is essential for many technical fields. Our easy-to-use calculator and the detailed explanation above will help you understand and perform this conversion effortlessly. Enter your values now to get started!