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PSID pounds per square inch
differential pressure
PSIG pounds per square
inch gage
pt pint
qt quart
R Rankine
rev. revolution(s)
rpm, r.p.m. revolutions per minute
sec. second
SHP shaft horsepower
sin sine
sq. cm, cm2 square centimetre(s)
sq. in square inch(es)
sq. ft square foot (feet)
sq. m, m2 square metre
sq. mi square mile(s)
sq. mil square mil
tan tangent
TEHP total equivalent
horsepower
THP total horsepower
V volt
yd(s) yard(s)
Weights and Measures: Metric Measures
Length
1 millimetre (mm) = 0.0394 in
1 centimetre (cm) = 10 mm = 0.3937 in
1 decimetre (dm) = 10 cm = 3.937 in
1 metre (m) = 100 cm = 1.0936 yds
1 kilometre (km) = 1000 m = 0.6214 mile
Area
1 square millimetre (mm2) = 0.0016 sq. in.
1 square centimetre (cm2) = l00 mm2 = 0.155 sq. in
1 square metre (m2) = l0,000 cm2 = 1.196 sq. yds
1 are (a) = 100 m2 = 119.6 sq. yds
1 hectare (ha) = 100 ares = 2.4711 acres
1 square kilometre (km2) = 100 hectares = 0.3861 sq. mile
Weight
1 milligram (mg) = 0.0154 grain
1 gram (g) = 1000 mg = 0.0353 oz
1 kilogram (kg) = 1000 g = 2.2046 lb
1 tonne (t) = 1000 kg = 0.9842 ton
Volume
1 cubic centimetre (cm3) = 0.061 cu. in
1 cubic decimetre (dm3) = 1000 cm3 = 0.0351 cu. ft
1 cubic metre (m3) = 1000 dm3 = 1.308 cu. yds
Liquid Volume
1 litre (l) = 1 dm3 = 1.76 pt
1 hectolitre (hl) = 100 l = 22 gal
Weights and Measures: Imperial Measures
Length
1 inch (in) = 2.54 cm
1 foot (ft) = 12 in = 0.3048 m
1 yard (yd) = 3 ft = 0.9144 m
1 rod (rd) = 5.5 yds = 4.0292 m
1 chain = 4 rds = 20.117 m
1 furlong = 10 chains = 201.17 m
1 mile = 8 furlongs = 1.6093 km
1 nautical mile = 2025.4 yds = 1.852 km
Area
1 square inch = 6.4516 cm2
1 square foot = 144 sq. ins = 0.0929 m2
1 square yard = 9 sq. ft = 0.8361 m2
1 acre = 4840 sq. yds = 4046.9 m2
1 square mile = 640 acres = 259 hectares
Weight
1 ounce (oz) = 437.6 grains = 28.350 g
1 pound (lb) = 16 oz = 0.4536 kg
1 stone = 14 lb = 6.3503 kg
1 hundredweight (cwt) = 112 lb = 50.802 kg
1 long ton = 20 cwt = 1.0161 t
Volume
1 cubic inch = 16.387 cm3
1 cubic foot = 1728 cu. ins = 0.0283 m3
1 cubic yard = 27 cu. ft = 0.7646 m3
Liquid Volume
1 fluid ounce (fl. oz) = 8 fl. drachms = 28.413 cm3
1 pint (pt) = 20 fl. oz = 568.26 cm3
1 pint = 4 gills = 0.5683 l
1 quart (qt) = 2 pt = 1.1365 l
1 gallon (gal) = 8 pt = 4.5461 l
1 bushel (bu) = 8 gal = 36.369 l
Liquid Volume (US)
1 fluid ounce (US) = 29.574 ml
1 pint (US) = 16 fl. oz (US) = 0.4723 l
1 gallon (US) = 8 pt (US) = 3.7854 l
Conversion factors: Imperial to Metric
Length Multiply by
inches
millimetres 25.4
inches
centimetres 2.54
feet
metres 0.3048
yards
metres 0.9144
statute miles
kilometres 1.6093
nautical miles
kilometres 1.852
Area Multiply by
square inches
square centimetres 6.4516
square feet
square metres 0.0929
square yards
square metres 0.8361
acres
hectares 0.4047
square miles
square kilometres 2.5899
Volume Multiply by
cubic inches
cubic centimetres 16.3871
cubic feet
cubic metres 0.0283
cubic yards
cubic metres 0.7646
Liquid Volume Multiply by
fluid ounces (UK)
litres 0.0284
fluid ounces (US)
litres 0.0296
pints (UK)
litres 0.5682
pints (US)
litres 0.4732
gallons (UK)
litres 4.546
gallons (US)
litres 3.7854
Weight Multiply by
ounces (avoirdupois)
grams 28.3495
ounces (troy)
grams 31.1035
pounds
kilograms 0.4536
tons (long)
tonnes 1.016
Conversion factors: Metric to Imperial
Length Multiply by
millimetres
inches 0.0394
centimetres
inches 0.3937
metres
feet 3.2806
metres
yards 1.9036
kilometres
statute miles 0.6214
kilometres
nautical miles 0.54
Area Multiply by
square centimetres
square inches 0.155
square metres
square feet 10.764
square metres
square yards 1.196
hectares
acres 2.471
square kilometres
square miles 0.386
Volume Multiply by
cubic centimetres
cubic inches 0.061
cubic metres
cubic feet 35.315
cubic metres
cubic yards 1.308
Liquid Volume Multiply by
litres
fluid ounces (UK) 35.1961
litres
fluid ounces (US) 33.8150
litres
pints (UK) 1.7598
litres
pints (US) 2.1134
litres
gallons (UK) 0.2199
litres
gallons (US) 0.2642
Weight Multiply by
grams
ounces (avoirdupois) 0.0353
　
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