Length

1

mile

metre

1   609.344

2

chain

metre

22 ï‚´ 0.914   4

3

yard

metre

0.914   4

4

link

metre

22 ï‚´ 0.914   4 / 100

5

foot

metre

0.914   4/ 3

6

inch

metre

0.914   4/ 36

Area

7

square yard

square metre

(0.914   4) 2

8

square foot

square metre

(0.914   4) 2 / 9

9

square inch

square metre

(0.914   4) 2 /( 9 ï‚´ 144)

10

acre

square metre

4   840 ï‚´ (0.914   4) 2

11

rood

square metre

1   210 ï‚´ (0.914   4) 2

12

perch

square metre

30.25 ï‚´ (0.914   4) 2

Mass

13

ton

kilogram

2   240 ï‚´ 0.453   592   37

14

short ton (sh tn)

kilogram

2   000 ï‚´ 0.453   592   37

15

hundredweight (cwt)

kilogram

112 ï‚´ 0.453   592   37

16

quarter (qr)

kilogram

28 ï‚´ 0.453   592   37

17

stone

kilogram

14 ï‚´ 0.453   592   37

18

pound (lb)

kilogram

0.453   592   37

19

ounce (oz)

kilogram

0.453   592   37/ 16

20

dram (dr)

kilogram

0.453   592   37/ 256

21

grain (gr)

kilogram

0.453   592   37/ 7   000

22

slug

kilogram

32.174 ï‚´ 0.453   592   37

23

troy ounce (oz tr)

kilogram

480 ï‚´ 0.453   592   37/ 7   000

24

pennyweight (dwt)

kilogram

24 ï‚´ 0.453   592   37/ 7   000

Volume

25

cubic yard
(cu yd or yd 3 )

cubic metre

(0.914   4) 3

26

cubic foot
(cu ft or ft 3 )

cubic metre

(0.914   4) 3 / 27

27

cubic inch
(cu in or in 3 )

cubic metre

(0.914   4) 3 / 466   56

28

gallon (gal)

cubic metre

4.546   09 ï‚´ 10 -3

29

quart (qt)

cubic metre

4.546   09 ï‚´ 10 -3 / 4

30

pint (pt)

cubic metre

4.546   09 ï‚´ 10 -3 / 8

31

gill

cubic metre

4.546   09 ï‚´ 10 -3 / 32

32

fluid ounce (fl oz)

cubic metre

4.546   09 ï‚´ 10 -3 / 160

33

fluid drachm (fl dr)

cubic metre

4.546   09 ï‚´ 10 -3 / 1   280

34

minim (min)

cubic metre

4.546   09 ï‚´ 10 -3 / 76   800

Velocity and speed

35

mile per hour (mile/h or mph)

metre per second

1   609.344/ 3   600

36

mile per hour (mile/h or mph)

kilometre per hour

1.609   344

37

foot per minute (ft/min)

metre per second

0.304   8/ 60

Work and energy

38

kilocalorie (kcal)

joule

4.186   8 ï‚´ 10 3

39

calorie (cal)

joule

4.186   8

40

British thermal unit (Btu)

joule

1   055. 056

Power

41

horsepower (hp)

watt

745.7

Pressure

42

millimetre of mercury (mm Hg)

pascal

133.322   19

43

millibar (mb or mbar)

pascal

100