Internet, Networking, & Security Home Networking Decibel in Computer Networking dBs are key to measuring Wi-Fi strength by Bradley Mitchell Writer An MIT graduate who brings years of technical experience to articles on SEO, computers, and wireless networking. our editorial process LinkedIn Bradley Mitchell Updated on September 14, 2020 Home Networking The Wireless Connection Routers & Firewalls Network Hubs ISP Broadband Ethernet Installing & Upgrading Wi-Fi & Wireless Tweet Share Email A decibel is a standard unit for measuring the strength of Wi-Fi wireless radio signals. Decibels are also used as a measure for audio equipment and other radio electronics, including cellphones. Burak Karademir / Getty Images What Are Decibels in Wi-Fi? Wi-Fi radio antennas and transceivers include decibel ratings as provided by the manufacturer. Home network equipment usually presents the rating in dBm units, where the 'm' represents milliwatts of electric power. In general, Wi-Fi equipment with a relatively larger dBm value can send or receive wireless network traffic across greater distances. However, larger dBm values also indicate that the Wi-Fi device requires more power to operate, which translates to decreased battery life on mobile devices.