DISTANCE

1 inch = 2.54 centimeters or 25.4 millimeters
1 foot = 30.5 centimeters or 305 millimeters
1 yard = 0.914 meter or 91.4 centimeters
1 mile = 1.61 kilometers or 1610 meters

SPEED

1 knot = 1.85 kilometers per hour

MASS

1 pound = 0.454 kilogram or 454 grams
1 ton = 1.02 tonnes or 1020 kilograms