USCS Length ( Common Abbreviations In Parentheses)

Length

1 inch (in) 1 furlong = 40 rods =1/8 mi 1 foot (ft) = 12 in 1 mile (mi) = 1760 yd = 5280 ft 1 yard (yd) = 3 ft 1 nautical mi = 1.15 mi = 6070.1 ft 1 rod = 5.5 yd 1 land league = 3 mi 1 fathom = 6 ft 1 marine league = 3 nautical miles

Weight

1 grain = 0.0648 grams

Avoirdupois Measures Troy Measures Apothecary Measures 1 ounce (oz) = 437.5 grains 1 carat = 3.086 grain 1 scruple = 20 grains 1 pound (lb) = 16 oz 1 pennyweight = 24 grains 1 dram = 3 scruples 1 ton = 2000 lb 1 troy once = 480 grains 1 apothem oz = 8 drams 1 long ton = 2240 1 troy lb = 12 troy oz 1 apothem. lb = 12 oz

Volume

Liquid measures Dry measures 1 tablespoon (T or = 3 teaspoon (tsp or t) 1 in 3 = 16.387 cm 3 tbsp) 1 fluid oz (fl oz) = 2 tbsp 1 ft 3 = (12 ft)3 = 1728 in 3 1 cup (c) = 8 fl oz 1 yd 3 = (3 ft)3 = 27 ft 3 1 pint (pt) = 16 fl oz 1 pt = 33.60 in 3 1 quart (qt) = 2 pt 1 qt = 2 pt 1 gallon (gal) = 4 qt 1 peck = 8 qt 1 bushel = 4 pecks 1 cord = 128 ft 3

Prefixes

Small Values Large Values Prefix Abbreviation Value Prefix Abbreviation Value Deci D 10 –1 Deca da 101 Centi C 10-2 Hecto h 102 Milli M 10 –3 Kilo k 103 Micro  10-6 Mega M 106 Nano N 10-9 Giga G 109 Pico p 10-12 Tera T 1012

USCS to SI Conversions

1 in = 2.540 cm 1 cm = 0.3937 in 1 ft = 0.3048 m 1 m = 3.28 ft 1 yd = 0.9144 m 1 m = 1.094 yd 1 mile 1.6093 km 1 km = 0.6214 mi 1 lb = 0.4536 kg 1 kg = 2.205 lb 1 fl oz = 29.574 ml 1 ml = 0.03381 fl oz 1 qt = 0.9464 l 1 l = 1.057 qt 1 gal = 3.785 l 1 l = 0.2642 gal