Concrete Calculators UK
Work out how much concrete you need for shed bases, garage floors, garden room slabs and any concrete base project. Choose between bags and ready-mix.
About these calculators
Our concrete calculator helps you estimate the volume of concrete needed for any base or slab. You can choose bags (20kg or 25kg) or ready-mix concrete, and add a wastage allowance to make sure you order enough.
For best results, always prepare a proper sub-base before pouring - use our Sub Base Calculator and MOT Type 1 Calculator to work out those quantities.