Copyright Goodheart-Willcox Co., Inc. May not be reproduced or posted to a publicly accessible website. 90 Math for HVACR 5.9.7 Velocity Measurement Conversions Velocity Measurement Conversion US Customary Multiply by: SI To convert from: feet per minute (fpm) 0.3048 meters per minute (m/min) cubic feet per minute (cfm) 0.02832 cubic meters/minute (m3/min) SI Multiply by: US Customary To get: To convert from: meters per minute (m/min) 3.281 feet per minute (fpm) cubic meters/minute ( m3/min) 35.31 cubic feet per minute (cfm) Goodheart-Willcox Publisher To convert cubic feet per minute (cfm) into cubic meters per minute (m3/min), the conversion chart shows a multiplier of 0.02832. For a conversion of 500 cfm to m3/min, the calculation would be as shown. 500 cfm × 0.02832 = 14.1600 m3/min Thus, 500 cfm equals 14.16 m3/min. To convert m3/min to cfm, use the multiplier 35.31. 14.16 m3/min × 35.31 = 499.9896 cfm Thus, 14.16 m3/min equals 499.9896 cfm, which can be rounded to 500 cfm.