The following are some of the standard abbreviations used in natural gas measurement.

Mcf: standard abbreviation for 1,000 cubic feet.

Bil cu ft: Billion cubic feet. Also abbreviated to bcf.

Tcf: trillion cubic feet.

Cu m: cubic meter.

bil cu m: billion cubic meters. Also abbreviated to bcm.

Tcm: trillion cubic meters.

quad or quads: quadrillion cubic feet.

MMBtu: Million British thermal units.

Dt: Dekatherm.