DIY TIPS AND TRICKS – CONVERSIONS

Posted: November 2, 2010 in Useful

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Conversion tables
Coverage of materials
Bricks
Blocks
Paving slabs
Wallpaper
Glass

BASIC CONVERSION TABLES:

The centimetre is very seldom used in the building and allied trades. The measurements are normally given in metres and millimetres.

Length Liquid Volume
1 inch = 25.40mm 1 litre = 0.035 cubic feet
1 foot = 304.8mm 1 cubic ft. = 28.32 litres.
1 yard = 914.4mm 1 gallon = 4.5461 litres
1 yard = 3 feet 1 cubic ft. = 6.23 gallons
1 metre = 1.0936 yards 1 cubic yd = 168.21 gallons
1 yard = 0.9144 metres 1 cubic mt = 1000 litres
1 metre = 3.281 feet
Volume Liquid Conversion
1 cubic metre = 35.315 cubic feet 1000 ml = 1 Litre
1 cubic metre = 1.3079 cubic yards 1 litre = 1.76 pints
1 cubic foot = 0.0283 cubic metre 1 ml = 1cc = 0.0017 pints
1 cubic yard = 0.7646 cubic metre 1ml or cc = 0.035 fluid ounce(oz)
1 litre = 0.22 gallons
1 fl.oz. = 28.413 ml or cc
1 pint 568 ml or cc
1 pint 0.568 litres
Weight Area
1 tonne (metric) = 2205 lbs 1 square mm = 0.00155 sq. inches
1 ton imperial = 2240 lbs 1 square metre = 10.764 sq. feet
1000 grams = 1 kilogram 1 square metre = 1.196 sq. yards
1000 kilograms = 1 tonne 1 square inch = 645.20 sq. mm
1 kilogram = 2.20462 lbs. 1 square foot = 0.0929 sq. metres
1 kilogram = 0.0197 cwt 1 Square yard = 0.8361 sq. metres
1 cwt = 112 lbs
1 cwt = 50.8 kg
1 lb = 0.4536 kg
1 lb = 16 oz
1 oz = 28.3 grams
Weights of materials.
Dry sand fine 1.28 tonnes per cubic metre
Dry sand coarse 1.6 tonnes per cubic metre
Topsoil (some moisture) 1.44 tonnes per cubic metre
Ballast 1.76 tonnes per cubic metre
gravel MOT Type 1 scalpings 1.92 tonnes per cubic metre
shingle 1.62 tonnes per cubic metre
cement 50 & 25 kg bags
stiff clay 1.6 tonnes per cubic metre
loam 1.28 tonnes per cubic metre
peat (wet) 0.96 tonnes per cubic metre
peat (dry) 0.8 tonnes per cubic metre
lump chalk 1.2 tonnes per cubic metre
sandstone 2.32 tonnes per cubic metre
Lias 2.48 tonnes per cubic metre
granite 2.72 tonnes per cubic metre
slate 2.8 tonnes per cubic metre
flint 2.3 tonnes per cubic metre
yorkstone 2.5 tonnes per cubic metre
Brick rubble 1.8–2.2 tonnes per cubic metre
Coverage of stone for 1 tonne weight Minimum depth of services
sets (100mmx100mmx100mm) 3.9 sq.m. water main 900mm
Cobbles 50/70mm on end 6.5 sq.m. Gas 600mm
pebbles 25/45mm loose@50mm 10 sq.m. TV/Telephone 350mm
gravel 25mm rolled 30 sq.m. sewers under grass 900mm
tarmac 12mm deep 13 sq.m. sewers under hard surface 1200mm
yorkstone paving 50mm 7.5 sq.m. Electric over 22kv 750mm
slate 25mm deep 12 sq.m. Electric under 22kv 600mm
Foundation concrete General purpose concrete
1 cubic metre = 6 x 50kg bags cement 1 cubic metre = 7 x 50kg bags cement
1.76 tonnes ballast 1.6 tonnes ballast

…also see our calculating material volumes project.

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COVERAGE OF MATERIALS:

If you are laying a patio or drive, placing topsoil for a lawn or covering your garden with stone, it is very useful to know how much you will need. Use our easy to read graph below to get the quantities right.

Measure the area of your garden and go up the left hand side of the graph to that area (for example 20 square metres at the top). Read horizontally along that line to the thickness of material you need (example 100mm). Where that line meets the diagonal line of your chosen depth go straight down and read the amount you need in cubic metres. (example = 2.00 cubic metres) This can be converted into weight using the tables above.

Material Coverage Graph

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BRICKS:

An imperial standard brick is 9 inches long, 4 1/2 inches wide and 3 inches deep.

A metric brick is 8.86 inches long (225mm) 4.43 inches wide (112.5mm) and 2.95 inches deep (75mm)

The above sizes include mortar joints at 10mm

This makes the metric brick marginally smaller than its imperial counterpart and the difference, when joining new to old, must be taken up with an increase in the mortar joints.

There are 60 bricks to 1 square metre and you will use approximately 0.022 cubic metres of wet sand and cement to lay them with 10mm joints, this is equivalent to approximately 60kg.

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BLOCKS:

A normal block is 2 bricks long, 3 bricks high and one brick wide (when laid with 10mm joints)

There are approx. 10 blocks to 1 square metre and you will use approx  0.012 cubic metres of wet sand and cement to lay them with a 10mm joint. This is equivalent to 31kg.

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PAVING SLABS:

Paving slabs come in a variety of shapes and sizes, we have listed a few of the popular ones with their respective coverage

.Type 1 Type 2 Type 3

225×450=10/sq.m.                     450×450=5/sq.m.             600×600=2.75/sq.m.

Type 4 Type 5

450×520=5.75/sq.m                     450×520=3.7/sq.m.

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WALLPAPER:

Normally you will get 4 “drops” from one roll of paper with a standard close pattern. Some papers have patterns a long way apart, you will need to consult your supplier for this. The table below shows standard rolls with normal patterns.

LENGTH OF ALL WALLS
7m 8.5m 10 11.5m 13m 14.5m 16m 17.5m 19m
HEIGHT
OF
WALL
0.25 4 5 5 6 7 8 8 9 9
2.5 – 3.5m 5 6 7 8 9 10 11 12 13

GLASS:

Thickness of glass, with the introduction of the metric system, is now defined in mm rather than weight. For the record here’s how it used to be.

2mm =18oz       3mm = 24oz    4mm = 32oz  6mm = quarter inch plate

http://www.diydoctor.org.uk/tips/tipsconversions.htm

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