Tables of Weights and Measures
Linear Measure
| Measure | Equivalents | |
| 1 inch | 2.54 centimeters | |
| 12 inches | 1 foot | 0.3048 meter |
| 3 feet | 1 yard | 0.9144 meter |
| 5½ yards | 1 rod (or pole or perch) | 5.029 meters |
| 16½ feet | ||
| 40 rods | 1 furlong | 201.17 meters |
| 8 furlongs | ||
| 1,760 yards | 1 (statute) mile | 1,609.3 meters |
| 5,280 feet | ||
| 3 miles | 1 (land) league | 4.83 kilometers |
Square Measure
| Measure | Equivalents | |
| 1 square inch | 6.452 square centimeters | |
| 144 square inches | 1 square foot | 929 square centimeters |
| 9 square feet | 1 square yard | 0.8361 square meter |
| 30¼ square yards | 1 square rod (or square pole or square perch) | 25.29 square meters |
| 160 square rods or 4,840 square yards or 43,560 square feet | 1 acre | 0.4047 hectare |
| 640 acres | 1 square mile | 259 hectares |
| 2.59 square kilometers |
Cubic Measure
| Measure | Equivalents | |
| 1 cubic inch | 16.387 cubic centimeters | |
| 1,728 cubic inches | 1 cubic foot | 0.0283 cubic meter |
| 27 cubic feet | 1 cubic yard (in units for cordwood, etc.) | 0.7646 cubic meter |
| 16 cubic feet | 1 cord foot | |
| 8 cord feet | 1 cord | 3.625 cubic meters |
Chain Measure (for Gunter's, or surveyor's, chain)
| Measure | Equivalents | |
| 7.92 inches | 1 link | 20.12 centimeters |
| 100 links | 1 chain | 20.12 meters |
| 66 feet | ||
| 10 chains | 1 furlong | 201.17 meters |
| 80 chains | 1 mile (for engineer's chain) | 1,609.3 meters |
| 1 foot | 1 link | 0.3048 meter |
| 100 feet | 1 chain | 30.48 meters |
| 52.8 chains | 1 mile | 1,609.3 meters |
Surveyor's (Square) Measure
| Measure | Equivalents | |
| 625 square links | 1 square pole | 25.29 square meters |
| 16 square poles | 1 square chain | 404.7 square meters |
| 10 square chains | 1 acre | 0.4047 hectare |
| 640 acres | 1 square mile | 259 hectares |
| 1 section | 2.59 square kilometers | |
| 36 square miles | 1 township | 9,324.0 hectares |
| 93.24 square kilometers |
Nautical Measure
| Measure | Equivalents | |
| 6 feet | 1 fathom | 1.829 meters |
| 100 fathoms | 1 cable's length (ordinary)1 | |
| 10 cables’ lengths | 1 nautical mile | 1.852 kilometers2 |
| 6,076, 10333 feet | ||
| 1 nautical mile | 1.1508 statute miles3 | |
| 3 nautical miles | 1 marine league | 5.56 kilometers |
| 3.45 statute miles | ||
| 60 nautical miles | 1 degree of a great circle of the earth |
Dry Measure
| Measure | Equivalents | ||
| According to United States government standards, the following are the weights avoirdupois for single bushels of the specified grains: for wheat, 60 pounds; for barley, 48 pounds; for oats, 32 pounds; for rye, 56 pounds; for corn, 56 pounds. Some states have specifications varying from these. | |||
| 1 pint | 33.60 cubic inches | 0.5505 liter | |
| 2 pints | 1 quart | 67.20 cubic inches | 1.1012 liters |
| 8 quarts | 1 peck | 537.61 cubic inches | 8.8096 liters |
| 4 pecks | 1 bushel | 2,150.42 cubic inches | 35.2383 liters |
| 1 British dry quart | 1.032 U.S. dry quarts | ||
Liquid Measure
| Measure | Equivalents | ||
| The barrel in Great Britain equals 36 imperial gallons, in the United States, usually 31½ gallons. | |||
| 1 gill | 4 fluid ounces (see next table) | 7.219 cubic inches | 0.1183 liter |
| 4 gills | 1 pint | 28.875 cubic inches | 0.4732 liter |
| 2 pints | 1 quart | 57.75 cubic inches | 0.9463 liter |
| 4 quarts | 1 gallon | 231 cubic inches | 3.7853 liters |
| 4 British imperial quarts | 1 imperial gallon | 277.42 cubic inches | 4.546 liters |
Apothecaries’ Fluid Measure
| Measure | Equivalents | ||
| See table immediately preceding for quart and gallon equivalents. | |||
| 1In the U.S. Navy 120 fathoms or 720 feet equals 1 cable's length; In the British Navy, 608 feet equals 1 cable's length. | |||
| 2By international agreement, 1954 | |||
| 3The length of a minute of longitude at the equator. Also called geographical, sea, or air mile, and, in Great Britain, Admiralty mile. | |||
| 1 minim | 0.0038 cubic inch | 0.0616 milliliter | |
| 60 minims | 1 fluid dram | 0.2256 cubic inch | 3.6966 milliliters |
| 8 fluid drams | 1 fluid ounce | 1.8047 cubic inches | 0.0296 liter |
| 16 fluid ounces | 1 pint | 28.875 cubic inches | 0.4732 liter |
| 1 British pint | 20 fluid ounces | ||
Circular (or Angular) Measure
| Measure | Equivalent |
| 60 seconds (″) | 1 minute (′) |
| 60 minutes | 1 degree (°) |
| 90 degrees | 1 quadrant |
| 1 right angle | |
| 4 quadrants | 1 circle |
| 360 degrees |
Avoirdupois Weight
| Measure | Equivalents | |
| 1 grain | 0.0648 gram1 | |
| 1 dram | 1.772 grams | |
| 27.34 grains | ||
| 16 drams | 1 ounce | 28.3495 grams |
| 437.5 grains | ||
| 16 ounces | 1 pound2 | 453.59 grams |
| 7,000 grains | ||
| 100 pounds | 1 hundredweight | 45.36 kilograms |
| 2,000 pounds | 1 ton | 907.18 kilograms |
Troy Weight
| Measure | Equivalents | |
| 1 grain | 0.0648 gram1 | |
| 3.086 grains | 1 carat | 200 milligrams |
| 24 grains | 1 pennyweight | 1.5552 grams |
| 20 pennyweights | 1 ounce | 31.1035 grams |
| 480 grains | ||
| 12 ounces | 1 pound | 373.24 grams |
| 5,760 grains |
Apothecaries’ Weight
| Measure | Equivalents | ||
| 1The grain is the same in all three tables of weight. | |||
| 2ln Great Britain, 14 pounds (6.35 kilograms) equals 1 stone, 112 pounds (50.80 kilograms) equals 1 hundred-weight, and 2,240 pounds (1,016.05 kilograms) equal 1 long ton. | |||
| 1 grain | 0.0648 gram1 | ||
| 20 grains | 1 scruple | 1.296 grams | |
| 3 scruples | 1 dram | 3.888 grams | |
| 8 drams | 1 ounce | 31.1035 grams | |
| 480 grains | |||
| 12 ounces | 1 pound | 373.24 grams | |
| 5,760 grains | |||