Convert any fraction of inch portion to its decimal equivalent. For example, seven-eighths of an inch is converted by dividing seven by eight yielding .875 inches.
Calculate your total inches including the decimal from step 1. For example, 3 7/8 inches is equal to 3.875 inches. Divide by 12 to obtain the decimal equivalent in feet. For example, 3.875 divided by twelve equals .3229 feet.
Add the whole feet and the calculated decimal equivalent of inches back together. For example, 11 feet 3 7/8 inches becomes 11.3229 feet.
Multiply the result in feet by .3048, which is exact number of meters in one foot according to the National Institute of Standards and Technologies. For example, 11.3229 feet times the conversion factor of .3048 equals 3.451 meters.