30m

30m is a compact notation that can denote either a length of 30 meters or a duration of 30 minutes, depending on the context. In everyday use, it often appears as shorthand in measurements, schedules, or descriptions of distance.

As a unit of length, 30 meters is part of the metric system. It equals 30,000 millimeters, approximately 98.4 feet or 32.8 yards, and is 0.03 kilometers. This length is encountered in construction, geography, sports fields, and other contexts where moderate outdoor distances or large indoor spans need to be described.

As a time duration, “30m” commonly stands for 30 minutes, or half an hour. It is frequently used in schedules, timers, event planning, and media or streaming contexts to indicate a half-hour interval or segment.

The term 30m also appears in amateur radio as the 30-meter band. This refers to the shortwave radio frequency range around 10 MHz, where the wavelength is about 30 meters. It is allocated for amateur use with regional variations and licensing requirements. The band supports various modes, including CW, SSB, and digital communications, and its propagation characteristics make it valuable for long-distance contacts under certain solar and atmospheric conditions.

In summary, 30m can indicate a length, a time duration, or a radio frequency band, with the meaning determined by its operational context.