Length
1 inch = 25.4 mm
1 foot = 30.5 cm
1 yard = 0.914 m
1 mile = 1.61 km
Mass
1 ounce = 28.3 g
1 pound = 454 g
Area
1 acre = 0.405 ha
Volume
1 gallon = 4.55 litres
Temperature
°C = 5/9 (°F - 32)