Lungime
from	to	multiply by
inches (in)	millimetres (mm)	25.4
millimetres (mm)	inches (in)	0.03937
inches (in)	centimetres(cm)	2.54
centimetres(cm)	inches (in)	0.3937
feet (ft)	metres(m)	0.3048
metres (m)	feet (ft)	3.2808
metres (m)	yards (yd)	1.0936
yards (yd)	metres (m)	0.9144
kilometres (km)	miles	0.6214
miles	kilometres (km)	1.60934
Suprafata
from	to	multiply by
square inches (in2)	square millimetres (mm2)	645.16
square inches	square centimetres	6.4516
square centimetres (cm2)	square inches	0.155
square feet (ft2)	square centimetres	929.03
square feet	square metres	0.0929
square metres(m2)	square feet	10.764
square yards(yd2)	square metres	0.83612
square metres	square yards	1.196
square miles	square kilometres	2.5899
square kilometres	square miles	0.386
square miles	hectares	258.999
acres	square metres	4046.86
acres	hectares	0.40468
hectares	acres	2.471
hectares	square metres	10,000
hectares	square kilometres	0.01
hectares	square yards	11,960
Volum
from	to	multiply by
cubic inches (cu in; in3)	cubic centimetres	16.387
cubic centimetres (cc; cm3)	cubic inches	0.061
cubic inches	litres (l)	0.01638
cubic feet	cubic metres	0.0283
cubic metres	cubic feet	35.315
cubic yards	cubic metres	0.7646
cubic metres	cubic yards	1.308
gills	litres	0.142
imp fluid ounces	millilitres	28.41
millilitres	imp fluid ounces	0.0352
US fluid ounces	millilitres	29.57
imp fluid ounces	US fluid ounces	0.961
US fluid ounces	imp fluid ounces	1.041
litres	imp fluid ounces	35.1961
litres	US fluid ounces	33.815
imperial pints (imp pt)	litres	0.568
litres	imperial pints (imp pt)	1.7598
litres	US pints	2.1134
imperial quarts (imp qt)	litres (l)	1.137
litres (l)	imperial quarts	0.88
imperial quarts	US quarts (US qt)	1.201
US quarts	imperial quarts	0.833
US quarts	litres (l)	0.946
litres (l)	US quarts	1.057
imperial gallons (imp gal)	litres	4.546
litres	imperial gallons	0.2199
imperial gallons	US gallons (US gal)	1.201
US gallons (US gal)	imperial gallons	0.8327
US gallons (US gal)	litres	3.785
litres	US gallons (US gal)	0.2642
Masa
from	to	multiply by
grains (gr)	grams (g)	0.0647
grams	grains	15.432
ounces (oz) (avoirdupois)	grams	28.35
grams	ounces (avoirdupois)	0.0353
grams	ounces (troy)	0.0322
ounces (troy)	grams	31.1
pounds (lb)	grams	453.592
pounds (lb)	kilograms (kg)	0.4536
kilograms (kg)	pounds (lb)	2.2046
stones	kilograms (kg)	6.3503
quarters	kilograms (kg)	12.7006
hundredweights	kilograms	50.8023
tons (GB)	kilograms	1016.05
tons (USA)	kilograms	907.2
tons (GB)	tonnes	1.016
tonnes	tons (long 2240 lb)	0.9842
tonnes	tons (short 2000 lb)	1.1023
Temperatura
C = (°F - 32) x 0.56
°F = (C x 1.8) + 32
Presiune
from	to	multiply by
Pounds-force per sq. inch (psi,lb/inch2)	Kilograms-force per square centimetre (kg/ cm2)	0.070307
Kilograms-force per square centimetre (kg/ cm2)	Pounds-force per sq. inch (psi,lb/inch2)	14.2233
Pounds-force per sq. inch (psi,lb/inch2)	Atmospheres (atm)	0.068
Atmospheres (atm)	Pounds-force per sq. inch (psi,lb/inch2)	14.696
Pounds-force per sq. inch (psi,lb/inch2)	Bars	0.069
Bars	Pounds-force per sq. inch (psi,lb/inch2)	14.5038
Pounds-force per sq. inch (psi,lb/inch2)	Millibar (mbar)	68.947
Millibar (mbar)	Pounds-force per sq. inch (psi,lb/inch2)	0.0145
Millibar (mbar)	Millimetres of mercury (mmHg)	0.75
Millimetres of mercury (mmHg)	Millibar (mbar)	1.333
Millibar (mbar)	Inches of water (inH2O)	0.535
Inches of water (inH2O)	Millibar (mbar)	1.868
Inches of water (inH2O)	Pounds-force per sq. inch (psi,lb/inch2)	0.036
Pounds-force per sq. inch (psi,lb/inch2)	Inches of water (inH2O)	27.68
Viteza
1 mph = 1.60934 km/h
1 km/h =0.621371 mph
Consum
10 mpg = 28.25 litres/100 km
50 mpg = 5.65 litres/100 km
Putere
550 foot-pounds per second (F.P.S.) = 745.7 Watts (W) or approximately ¾ of a kilowatt.
To convert Watts to Horsepower multiply by 0.0013
Horsepower to Watts multiply by 745.7