Quick links Find a stockist Our products DIY Retailers Trade professionals Calculators Hints & Tips Data sheets Contact us Calculators Concrete for laying slabs Mortar for laying bricks or blocks Concrete for post holes Sand for paving gaps Render for walls Packaged products Calculators This series of simple calculators has been developed to help you plan your project. For each calculation you will need to know the dimensions of your project. The calculator will perform the sums for you, where relevant it will add a small percentage for the wastage that inevitably happens when mixing & using cement based products and then it will round the result up to the nearest whole 20kg bag. When planning your project, you may need to seek specialist advice. For example - how deep should you dig your holes for setting posts? There is no simple answer as there are so many factors that can affect the depth the hole needs to be; the soil type and the planned load on the post are just two factors. Concrete for laying slabs: A simple calculator to work out how much concrete you need for laying a slab > Read more Mortar for laying bricks or blocks: A simple calculator to work out how much mortar you need for laying bricks or blocks > Read more Sand for paving gaps: A simple calculator to work out how much sand you need for paving gaps > Read more Concrete for post holes: A simple calculator to work out how much concrete you need to set a post > Read more Render: A simple calculator to work out how much render you need > Read more Find a stockist Enter your postcode or suburb to find a Cement Australia stockist near you. Did you know...? A shovel should never be used to measure concrete or mortar ingredients by volume. Cement tends to lie flat on the shovel and will have less volume than the sand which affects the mix proportions and the ultimate quality of the finished mortar or concrete mix. It is recommended that a bucket is used for measuring all these dry ingredients and that an accurate measure like a plastic measuring jug is used for the water addition to give you high quality, consistent results with each batch you mix. cement australia packaged products bulk products home contact us our locations disclaimer privacy sitemap back to top