How Much Sand for 100 Square Meters

Sand Calculator

How much sand do I need for 100 square meters?

Answer

100 square meters covered 2.5 cm deep takes

2.5 m³

That is 2,500 L, and it weighs roughly 4,125–5,000 kg (4.13–5 tonnes) when dry. The same patch under topsoil comes out quite differently — topsoil is lighter and normally goes down several times thicker.

How the Volume Is Calculated

Cubic meters = m² × cm ÷ 100

The hundred is not a coefficient, only centimetres turned into metres: a layer 100 cm thick is exactly one metre, so a cubic metre spread 1 cm deep covers 100 m².

100 square meters × 2.5 cm ÷ 100

2.5 m³

(2,500 L)

The depth is our assumption, not a recommendation. 2.5 cm is about what a bedding course under pavers comes to, but we have no published source for it — a play area or a base layer is far deeper. Type your own depth into the form above, or read it off the table below.

100 Square Meters at Other Depths

Depth scales the answer in a straight line, so the whole range fits in one table. Type any depth into the form above to work it out in full. The last column is the coverage of a single unit of volume, which is the number to keep in mind when a supplier quotes by the m³.

Depth	Sand needed	One cubic metre covers
1 cm	1 m³	100 square meters
2.5 cm	2.5 m³	40 square meters
4 cm	4 m³	25 square meters
5 cm	5 m³	20 square meters
8 cm	8 m³	12.5 square meters
10 cm	10 m³	10 square meters

What It Weighs and What to Order

Volume is the exact half of this page; weight is the approximate half. Only the top of the band has a source: the WSDOT Design Manual puts material that is essentially all sand at 2,000 kg per cubic metre compacted. Loose sand, which is how it arrives on a truck, is lighter — and WSDOT publishes no truck-measure figure for sand, so 1,650 kg is our own allowance rather than a quoted number.

Volume	2.5 m³
In litres	2,500 L
Weight, dry	4,125–5,000 kg
In tons	4.13–5 tonnes
Order with 10% for waste	2.75 m³

The 10% is quoted, not invented: the WSDOT Design Manual tells estimators to increase required quantities by 10% to allow for waste when material is stockpiled. A screeded sand bed also loses depth once it is compacted. Bagged sand is usually sold by weight, so divide the 4,125–5,000 kg by the weight printed on the bag — and remember that band is wide, so it gives you a range of bag counts, not one number.

Every weight here is dry weight. WSDOT states it plainly: weights shown are dry weights and corrections are required for water contents. Damp sand off a yard can be noticeably heavier.

Sand Calculator

This calculator works out how much sand an area needs: the volume in cubic metres and litres, what it weighs in kilograms and tonnes, and how much one cubic metre covers. For example, it can help you find out how much sand do I need for 100 square meters? (The answer is: 2.5 m³). Enter the area (e.g. 100 square meters), choose the unit; the answer assumes a layer 2.5 cm deep and the depth table covers the rest.

Sand Calculator

Sand Needed at 2.5 cm Deep

Area	Volume	Weight
5 square meters	0.125 m³	206–250 kg
10 square meters	0.25 m³	413–500 kg
15 square meters	0.375 m³	619–750 kg
20 square meters	0.5 m³	825–1,000 kg
25 square meters	0.625 m³	1,031–1,250 kg
30 square meters	0.75 m³	1,238–1,500 kg
40 square meters	1 m³	1,650–2,000 kg
50 square meters	1.25 m³	2,063–2,500 kg
60 square meters	1.5 m³	2,475–3,000 kg
80 square meters	2 m³	3,300–4,000 kg
100 square meters	2.5 m³	4,125–5,000 kg
120 square meters	3 m³	4,950–6,000 kg
150 square meters	3.75 m³	6,188–7,500 kg
200 square meters	5 m³	8,250–10,000 kg

FAQ

How much sand do I need for 100 square meters?

100 square meters covered 2.5 cm deep takes 2.5 m³

How many cubic metres of sand is 100 square meters?

2.5 m³, at 2.5 cm deep. The arithmetic is exact: 100 × 2.5 ÷ 100 = 2.5. Dividing by a hundred only turns centimetres into metres — there is no coefficient hidden in it.

How much does 100 square meters of sand weigh?

Roughly 4,125–5,000 kg, or 4.13–5 tonnes, dry. The top of that band comes from the WSDOT Design Manual, which puts essentially-all-sand material at 2,000 kg per cubic metre compacted; the bottom is our own allowance for loose sand as delivered, since no truck-measure weight is published for sand. Wet sand is heavier again.