dBmV to dBm 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 dBmV to dBm

Our dBmV to dBm conversion calculator tool helps you convert dBmV (decibels-microvolts) to dBm (decibels-milliwatts) 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 dBmV to dBm Conversion

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.

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.

Conversion Formula

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

Where 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 voltage level of 10dBmV, and your system impedance is 50 ohms. To convert this to dBm, follow these steps:

  1. Calculate the square root of the impedance:


  1. Calculate the logarithm of the square root of the impedance:


  1. Apply the formula:


So, 10 dBmV is approximately -36.98 dBm for an impedance of 50 ohms.

Use Our Calculator

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

Frequently Asked Questions

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

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

2. What are common values for 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 value to perform the conversion accurately.

Converting dBmV to dBm 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!