Useful Information

Calculators & Convertors

Why not use these helpful conversion tips and calculator links and make your next project that little easier! Of course, your local branch of Howarth Timber & Building Supplies is only a phone call away for any queries not covered here.


Timber and sheet Materials

Measuring up – to convert multiply by the figure shown.

  • Inches into Millimeters - 25.4

  • Millimetres to Inches - 0.03937

  • Feet to Metres - 0.3048

  • Metres to Feet - 3.281

  • Square Metres to Square Feet - multiply by 10.764

  • Square Feet to Square Metres - Multiply by 0.0929

  • Cubic Metres to Cubic Feet - 35.315

  • Cubic feet to Cubic metres - 0.028


Number of Linear m in a m3 is calculated by multiplying the section size then dividing into 1,000,000, so:

  • 25 x 100 = 2500

  • 1,000,000/2500 = 400 linear m in a m3 of 25 x100

  • 47 x 150 = 7050

  • 1,000,000/7050 = 141.84 linear m in a m3 of 47 x 150

Floor fitting tips

  • Always allow floors to acclimatize before laying.

  • Always allow expansion gaps on all sides and at every room dividing section.

Brick Calculator
Click here to calculate the amount of bricks required for a given area.


Planit Design Online
Design Online is a simple, intuitive facility which allows your local Howarth Timber & Building Supplies branch to create your perfect kitchen! Click here for more details or contact your local branch to arrange a no obligation consultation.


Building materials - general guidelines

  • To maintain the strength of ready mixed concrete delivered to site, never add water to the prescribed mix.

  • Because shingle is a natural product never assume that it will be a particular colour.

  • For external rendering washed sand should be used.

  • When using more than one pack of paving bricks or tiles, always use from different packs at random to avoid shade variations.

Concrete mixes for paths and oversight slabs

  • 1 Volume Cement

  • 5 Volumes Ballast

  • 12 Bags Cement

  • 1m3 Ballast - makes 0.85m3 of concrete

For flooring or paving

  • Use Blended or Washed sand

  • 1 Volume Cement

  • 3 Volumes Sand

  • 18 Bags of Cement

  • 1m3 Sand - makes 0.9m3 of concrete

For walls

  • Plaster Coverage per 25kg Bag

  • Thistle multi Finish - 10m2 at 2mm

  • Thistle Bonding - 2.75m2 at 11mm

  • Thistle Hardwall - 3m2 at 11mm

  • Thistle Tough Coat - 3.5m2 at 11mm

  • Thistle Universal Coat - 2.25m2 at 13mm

Plasterboards (maximum spacing and fixing nails)

  • Board size: 2400 x 1200 x 9.5

  • 400mm c/s = 51 nails per sheet

  • Board size: 2400 x 1200 x 12.5

  • 450mm c/s = 41 nails per sheet

For small Jobs

  • Brick size: 65 x 215 x 100

  • Approximate quantities for single brickwork of 60 bricks per m2 allow 0.8m3 sand per 1000 bricks

  • Block size: 215 x 450 x 100

  • Approximate quantities for single blockwork of 10 Blocks per m3 allow 0.8m3 of sand per 40m2 of blockwork.

 

  • Forests Forever
  • British Woodworking Federation
  • Secured by Design
  • Wood Window Alliance
  • Timber Trade Federation
  • Timber Decking & Cladding Association
  • Federation of Master Builders

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