A standard 25kg bag of cement typically costs £5 to £7 + VAT, depending on brand and quantity ordered.
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A 25kg bag of sand usually costs £2.50 to £4 + VAT, depending on the type.
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A bulk bag of sand holds approximately 0.6 to 0.8 cubic metres.

A standard bag of cement weighs 25kg.

A 25kg bag of sand weighs exactly 25kg. Bulk bags usually weigh between 850kg and 1000kg.

You’ll get roughly 10–12 shovels from a 25kg bag, depending on how full each scoop is.

A tonne bag of sharp sand typically costs £40 to £60 + VAT.
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A 25kg bag of building sand will lay around 25 to 30 bricks, depending on mix ratio and joint thickness.

A 25kg bag of cement equates to roughly 5–6 heaped shovels.

For a 6:1 mix, use about 6 bags of cement per bulk bag of ballast.
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For a 5:1 mortar mix, use around 5 to 6 bags of cement per bulk bag of building sand.

Using a 5:1 ratio, you’ll need around 12 to 15 shovels of sand for half a 25kg bag of cement.

Depending on the mix (e.g. C20, C25), you’ll need roughly 7–8 bags of cement per cubic metre for a standard 1:2:4 mix.

A bulk bag of sand typically contains the equivalent of 35 to 40 bags of 25kg sand, depending on moisture content and compaction.

No — cement should always be kept dry and off the ground. Exposure to moisture, even in sealed bags, can cause clumping and make it unusable.

A common bricklaying mix is 5 parts building sand to 1 part cement. Add plasticiser for improved workability.

Building sand is fine and used in mortar for bricklaying. Sharp sand is coarse and better for concrete, screed, and laying slabs.