What is the approximate bandwidth of a VHF repeater FM voice signal?

Standard amateur FM voice signals use a frequency deviation of up to 5 kHz. When you factor in the highest modulating audio frequency (about 3 kHz) and calculate the total bandwidth, an amateur FM transmission requires roughly 10 to 15 kHz of space. This is significantly wider than an SSB signal (3 kHz) or a CW/Morse code signal (about 150-500 Hz). However, it is still much narrower than a commercial FM broadcast signal, which requires about 150 to 200 kHz of bandwidth to transmit high-fidelity stereo audio. Understanding this 10 to 15 kHz bandwidth requirement helps amateurs properly space their channel frequencies on VHF and UHF bands to avoid adjacent-channel interference.