Meter Yard Foot Decimeter Inch Inch Actual Centimeter Actual Millimeter Actual Goodheart-Willcox Publisher Figure 4-26. The above illustration compares relative lengths of metric and customary units. 1″ = 25.40 mm To convert inches to millimeters, multiply by 25.4 Example 3″ = 3 × 25.4 = 76.2 mm 1″ = 2.54 cm To convert inches to centimeters, multiply inches by 2.54 16″ = 16 × 2.54 = 40.64 cm 1′ = 0.3048 m To convert feet to meters, multiply feet by 0.3048 3′ = 3 × 0.3048 = 0.9144 m Polymetric Services, Inc., Tarzana, CA 91356 Goodheart-Willcox Publisher Figure 4-27. Metric and customary dry volume measurements and conversion factors. To convert from cubic inches to: Multiply by: Example: Gallons Cubic feet Liters 0.004 0.00058 0.016 3674 cu in = ____ gal 4677 cu in = ____ cu ft 286 cu in = ____ liters 3674 × .004 = 14.7 gal 4677 × .00058 = 2.712 cu ft 286 × .016 = 4.576 liters To convert from cubic feet to: Multiply by: Example: Gallons Cubic inches Liters Cubic meters Cubic yards 7.48 1728.0 28.32 0.028 0.037 6.5 cu ft = ____ gal 3 cu ft = ____ cu in 1.5 cu ft = ____ liters 278 cu ft = ____ cu meters 5687 cu ft = ____ cu yards 6.5 × 7.48 = 48.62 gal 3 × 1728.0 = 5184.0 cu in 1.5 × 28.32 = 42.48 liters 278 × .028 = 7.784 cu meters 5687 × .037 = 210.42 cu yards Cubic inch Cubic centimeter Cubic foot Cubic decimeter 82 Section 1 Introduction to Plumbing Copyright Goodheart-Willcox Co., Inc.