The following table lists the FM spacing standards contained in Table A of 47 CFR Section 73.207 of the FCC's rules for the various classes of FM commercial radio stations in the USA. These separations also apply to all noncommercial educational stations operating between 92.1 MHZ to 107.9 MHz (Channels 221 to 300), and to certain noncommercial ecuational stations on Channels 218, 219 and 220 which must meet these spacings to FM stations operating on Channels 221, 222, and 223. Intermediate Frequency (I.F.) separations apply both to commercial and most noncommercial educational stations.

These minimum separations must be met before a petition for rulemaking may be filed for new FM allotments. FM broadcast stations or applicants for an existing commercial-band allotment may in some cases apply for (on FCC Form 301) a transmitter site which is closer spaced than these requirements, provided that the provisions of 47 CFR Section 73.215 are met. In addition to these separations, applicants or petitioners for Channel 253 (98.5 MHz) must also meet the I.F. spacing with respect to TV Channel 6 stations.

Applicants and petitioners for rulemaking within 320 km of the Canadian and Mexican borders must meet different spacing standards with respect to foreign stations. These are located in the Canadian Border Zone Spacings and the Mexican Border Zone Spacings documents.

Noncommercial Educational FM stations on Channels 218, 219, and 220 mustalso meet these separations with respect to commercial FM stations and vacant allotments on Channels 221, 222 and 223. The I.F. separation requirements in the following table also apply to noncommercial educational stations.

Spacing requirements for LPFM stations and applications will be found in 47 CFR 73.807.

Spacings should be rounded to the nearest kilometer, per 47 CFR 73.208.