Weights and Measures: Table



Weights and Measures: Table

Weights and Measures: Table

°C= (F-32) x 5/9

Some Non-SI Units Used in North America

Unit

Definition

SI Value

LENGTH

nautical mile

air & sea measure¹

1.852 km

furlong

220 yd

201.2 m

mile

1760 yd

1.609 km

arpent

180 Paris feet

58.47 m

yard

3 feet

0.9144 m

foot

12 inches

0.3048 m

inch

1/36 yard

25.4 mm

 AREA

acre (survey)

4840 sq yards (survey)

4047 m2

acre (commercial)

4000 sq yards (commercial)

3344.51 m2

MASS

Avoirdupois:

long ton

2240 lb

1.016 t

short ton

2000 lb

0.907 t

pound

16 ounces

0.453 kg

ounce

1/12 ancient Roman pound

28.35 g

Troy:

pound

12 oz

0.3732 kg

ounce

20 dwt

31.10 g

pennyweight (dwt)

24 g

1.555 g

CAPACITY

barrel (bbl)

36 gal

163.7 L

barrel [US]²

42 US gal

159.0 L

bushel (bu)

4 pecks

36.37 L

peck

2 gal

9.092 L

gallon (gal)

 

4.54609 L

gallon [US]

231 cu in

3.785 L

quart (qt)

¼ gal

1.137 L

pint (pt)

½ qt

568.3 ml

MISCELLANEOUS

British Thermal Unit (Btu)³

 

1055 J

carat

weight for precious stones

 200 mg

Fahrenheit (°F)

 

°F = (C x 1.8) + 32

°C = (F - 32) x 5/9

horsepower

 550 ft lb/sec

 745.7 W

knot

1 naut mi/hr

 0.5144 m/s

¹ Based on the length of a minute of arc of a great circle; differs because the Earth is not a perfect sphere
² This is the barrel used in the oil industry
³ The amount of heat required to raise the temperature of a pound of water one degree Fahrenheit near 39.2°F

For more information see the article WEIGHTS AND MEASURES.