Practical guide
Sand and Cement Mix Ratios: Mortar, Plaster and Screed
A cement:sand ratio describes measured proportions, not a universal recipe. The required material and ratio depend on the application. Confirm the specification, then use the Sand and Cement Calculator to estimate purchasing quantities from the wet volume.
Updated 15 October 2026
Reviewed by the 99Tools team. Editorial and corrections policy.
Read ratios in the stated order
The calculator uses cement first and sand second, measured by volume. A hypothetical 1:4 ratio is one part cement to four equal measured parts sand. A cement bag is sold by mass, while a wheelbarrow or bucket is a volume. Do not read that example as one bag to four barrows or assume every sand has the same moisture and bulking.
What is the mixture called?
Sand, cement and water can form cement mortar. Bricklaying mortar, plaster and screed describe different uses with their own material and performance requirements. Conventional concrete normally also includes coarse aggregate, often called stone. A crossword clue about a mixture is not a construction specification and does not belong as a separate calculator page.
Bricklaying, plastering and screed
Obtain the required sand type, cement, ratio, thickness and mixing instructions for the particular job. Do not apply a floor screed ratio to every plaster coat or assume building sand and plaster sand are identical. A screed is a floor layer with its own preparation, bonding, movement and curing requirements; quantity alone does not establish a suitable system.
How to mix sand and cement
Follow the specified batching method and product instructions. Measure materials consistently, combine the dry ingredients evenly and add clean water in the controlled amount required by the method. The calculator does not set water dosage or working time. Use the specified surface preparation, application and curing procedure, rather than treating an estimated purchasing ratio as full installation guidance.
Paving joints and tile fixing
Do not sweep a generic cement slurry into paving joints merely because the ingredients are available. Some paving manufacturers warn about staining and unsuitable joint performance. Follow the chosen paving system’s jointing material instructions. Tile fixing and grouting can require formulated adhesives or grout with product coverage data, not an improvised masonry mix.
Ready mix and quoted prices
Ready-mixed mortar or plaster and complete dry premix are different purchasing products from separate cement and sand. Check usable yield and the ingredients before estimating bags. For a site mix, compare current quotes on the same sand volume basis and cement bag mass, including consistent tax and delivery terms. No verified national sand-and-cement price applies to every job or supplier.
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.