Practical guide
How Much Sand and Cement per m² or 1,000 Bricks?
For plaster or screed, start with area and average thickness. For 1,000 bricks, start with a wet mortar rate confirmed for the actual units and joints. Both methods need the specified mix and agreed conversion assumptions before they can estimate cement and sand.
Updated 15 October 2026
Reviewed by the 99Tools team. Editorial and corrections policy.
Plaster quantity per square metre
One square metre at 15 mm thickness contains 0.015 m³ of geometric wet material before allowance. At 20 mm it contains 0.020 m³. These are volume examples, not recommended coat thicknesses. Measure the net surface, account for unevenness in the agreed average thickness and calculate separate coats independently when their requirements differ.
Work from wet volume to purchasing quantities
For an example 10 m² surface at 15 mm, wet volume is 0.15 m³. Adding 10% and using an illustrative dry factor of 1.33 gives 0.21945 m³ of adjusted dry materials. At a hypothetical 1:4 cement:sand ratio and 1,440 kg/m³ bulk cement density, cement is 63.2016 kg and sand is 0.17556 m³. Buy two complete 50 kg cement bags; do not round each small area up separately before combining a matching mix.
For 1,000 bricks, ask for the mortar yield
Brick size, joints, bedding, frogs, perforations and site waste change the mortar needed. There is no fixed universal cement bag count for 1,000 bricks. Enter a confirmed wet mortar quantity in litres per 1,000, then multiply it by your actual count divided by 1,000. The calculator converts litres to m³ before splitting the selected mix.
Rates per m² of brickwork
If your rate is in m³ of mortar per m² of one leaf, use the Brick Mortar Calculator and select the actual number of similar leaves. Do not enter the same elevation area twice just because a wall has two visible faces. Different inner and outer products need separate rates. Openings and special details must be included in the measured take-off.
Sand ordering and costs
The calculated sand quantity is a bulk-volume estimate using your entered assumptions. A delivered loose volume or weight can differ because of moisture, bulking and the supplier’s measuring method. Confirm the order conversion and quote basis rather than assuming a tonne equals one cubic metre. Cost inputs must describe the same quantity basis as the estimate.
Check the scope before applying the result
The estimate does not provide stone for concrete, complete premix bags, tile adhesive, paving grout, water, labour or a performance specification. For concrete questions involving sand, stone and cement, use the concrete tool with a confirmed recipe or product yield. For formulated materials, use the manufacturer’s coverage rather than a generic site-mix ratio.
Use the related calculators
Apply the explanation above with your own figures. Open a calculator below, check every input and review the result assumptions before making a decision.
Frequently asked questions
How do I use the Sand and Cement Calculator?
Enter area and thickness, a known wet volume, or a brick count with a confirmed mortar yield. Supply the specified cement:sand ratio and conversion assumptions; the calculator estimates cement bags and sand bulk volume.
How much sand and cement do I need for 1,000 bricks?
There is no universal quantity. Enter 1,000 bricks and the confirmed wet mortar litres per 1,000 for the actual units, joints and bedding, then use the specified mix.
How much sand and cement per m² of plastering?
It depends on thickness and the specified mix. One m² at 15 mm thickness has a geometric wet volume of 0.015 m³ before allowance. Convert that volume using the agreed material assumptions.
What is the sand and cement mix ratio?
The ratio describes measured parts, normally by volume when stated that way. Enter cement first and sand second here. No single ratio is suitable for every mortar, plaster, screed or paving job.
Is a mixture of sand and cement called mortar?
Sand and cement mixed with water can form cement mortar. Plaster and screed describe particular uses and specifications; conventional concrete also includes coarse aggregate.
Does this calculate ready-mixed product bags?
This method splits a site mix into cement and sand. Use the mortar or premix tool with the product’s labelled yield for complete bagged products; their entire mass is not cement.
Can I use sand and cement to grout pavers or fix tiles?
Do not assume a generic mix is suitable. Use the paving or tile system’s specified jointing or fixing product and coverage. This calculator does not establish product compatibility.