Calculate the exact length of a half-wave dipole wire antenna instantly. Input your frequency in MHz, kHz, or GHz for precise feet & meters cuts.
Dipole Antenna Calculator
Results update instantly as you type your target frequency.
Total Antenna Length
Each Element / Leg Length
Note: Calculations use standard formulas (468/f for feet, 143/f for meters). Always cut your wire slightly long to allow for final tuning and trimming!
How to Use Dipole Antenna Calculator
You can easily find out the length of the antenna based on frequency. You need to provide the required values to get the results. Simply enter the frequency of the signal you wish to design the antenna for in the provided input field. Then select the unit of frequency from the dropdown menu.
After proper selection of frequency and unit, click the “Calculate” button. The calculator will display the optimal dipole antenna length in both meters and feet. This calculator will helping you to determine the correct dimensions for your antenna based on the frequency you given. This tool is very helpful for antenna designers, ham radio operators, and anyone who needs to calculate the antenna lengths for specific frequencies.
Dipole Antenna Length Calculator Equation
Length (in meters) = 143 / Frequency
Length (in feet) = 468 / Frequency
- where 143 and 468 are constants.
How to set up a dipole FM antenna
To set up a dipole FM antenna first you need to start by fixing the frequency you want to use. The normal FM frequency is in between 88 MHz and 108 MHz. Use the dipole antenna calculator tool to calculate the antenna length. For example, You are targeting at 100 MHz frequency the antenna should be approximately 1.43 meters long based on the calculation. so each leg of the dipole will be half of that length.
You need to cut the two equal lengths of wire and attach them to the center connector of a coaxial cable. Then the center conductor connects to one leg and the shield to the other. Use insulators at both ends of the wires to prevent short circuits and secure the antenna. Mount the antenna horizontally between two supports. Once the antenna is installed then connect the coaxial cable to your FM receiver or transmitter and test the antenna for optimal signal. For best performance, experiment with the antenna’s orientation and position, keeping it clear of obstructions to maximize reception.
