Length
1
inch
= 25.4 millimetres (mm)
1
foot
= 30.48 centimetres (cm)
1
yard
= 0.9144 metre (m)
1
mile
= 1.6093 kilometres (km)
1
millimetre = 0.03937 inch
1
centimetre = 0.0328 foot
1
metre
= 1.094 yards
1
kilometre = 0.62137 mile
Volume
1
inch
3
= 16.387 cm
3
1
foot
3
= 28.316 decimetres
3
1
pint
= 0.568 litre
1
imperial gallon = 4.546 litres
1
centimetre
3
= 0.0610 inch
3
1
decimetre
3
= 0.035 feet
3
1
litre
= 1.76 pints
1
litre
= 0.220 imp gallon
Area
1
sq. inch
= 6.4516 sq cm
1
sq. yard
= 0.8361 sq metre
1
sq. mile
= 2.589 sq kilometres
1
acre
= 4047 sq metres
1
sq. centimetre = 0.155 sq inch
1
sq. metre
= 1.1960 sq yards
1
sq. kilometre = 0.386 sq mile
1
hectare
= 10,000 sq metres
1
hectare
= 2.471 acres
Double Conversion Tables
The central figures represent either of the two columns beside them, as the case may be.
Example: 1 kilometre = 0.621 mile and 1 mile = 1.609 kilometres.
Thermometer Comparisons
–
°F to °C – deduct 32, multiply by 5, divide by 9. °C to °F – multiply by 9, divide by 5, add 32.
Metric Equivalents
Abbreviations
Prefixes
for instance
Metre – m
kilo (k) – 1000 times unit
milli (m) – 1/1000 of unit
100
centimetres = 1 metre
Gram – g
hecto (h) – 100 times unit
centi (c) – 1/100 of unit
1000
milligrams = 1 gram
Litres – l
deca (da) – 10 times unit
deci (d) – 1/10 of unit
10
metres
= 1 decametre
100
litres
= 1 hectolitre
Centimetres
Inches
2.540
1
0.394
5.080
2
0.787
7.620
3
1.181
10.160
4
1.575
12.700
5
1.969
15.240
6
2.362
17.780
7
2.756
20.320
8
3.150
22.860
9
3.543
Metres
Yards
0.914
1
1.094
1.829
2
2.187
2.743
3
3.281
3.658
4
4.374
4.572
5
5.468
5.486
6
6.562
6.401
7
7.655
7.315
8
8.749
8.230
9
9.843
Kilometres
Miles
1.609
1
0.621
3.219
2
1.243
4.828
3
1.864
6.437
4
2.485
8.047
5
3.107
9.656
6
3.728
11.265
7
4.350
12.875
8
4.971
14.484
9
5.592
Litres
Gallons
4.546
1
0.220
9.092
2
0.440
13.638
3
0.660
18.184
4
0.880
22.730
5
1.100
27.276
6
1.320
31.822
7
1.540
36.368
8
1.760
40.914
9
1.980
Kilograms
Pounds
0.454
1
2.205
0.907
2
4.409
1.361
3
6.614
1.814
4
8.819
2.268
5
11.023
2.722
6
13.228
3.175
7
15.432
3.629
8
17.637
4.082
9
19.842
Sq. Metres
Sq. Yards
0.836
1.196
1.672
2.392
2.508
3.588
3.345
4.784
4.181
5.980
5.017
7.176
5.853
8.372
6.689
9.568
7.525
10.764
Weight
1
ounce
= 28.349 grams (gm)
1
pound
= 0.4536 kilogram (kg)
1
stone
= 6.350 kilograms
1
cwt
= 50.80 kilograms
1
ton
= 1.016 tonnes
1
gram
= 0.03527 ounce
1
kilogram = 2.205 pounds
1
kilogram = 0.158 stone
1
kilogram = 0.01968 cwt
1
tonne
= 0.9842 ton
Easy Conversions
Metrics into yards –
Add one-tenth
Yards into metres –
Deduct one-tenth
Kilometres into miles –
Multiply by 5 and divide by 8
Miles into kilometres –
Multiply by 8 and divide by 5
Litres into pints –
Multiply by 7 and divide by 4
Pints into litres –
Multiply by 4 and divide by 7
Litres into gallons –
Multiply by 2 and divide by 9
Gallons into litres –
Multiply by 9 and divide by 2
Kilograms into pounds –
Divide by 9 and multiply by 20
Pounds into kilograms –
Divide by 20 and multiply by 9
