Calculation of the amount of crushed stone for the foundation, paths, blind areas and bedding
Calculation of the amount of crushed stone for the foundation, paths, blind areas and bedding
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The online crushed stone calculator will help you calculate the required amount of crushed stone for various construction works: foundations, paths, blind areas and bedding. The dimensions of the area, the thickness of the layer, the fraction and density of crushed stone, as well as the supply of material are taken into account.
The crushed stone calculator uses precise formulas to calculate the volume and weight of the material, taking into account the type of work and the characteristics of the crushed stone. Suitable for calculating various fractions: from small (5-10 mm) for decoration to large (40-70 mm) for bedding. Calculation formula: Volume = Area × Thickness or Volume (if specified directly). Weight = Volume × Density. Taking into account the stock: Final volume = Volume × (1 + Stock / 100).
Let's look at practical examples of calculating the amount of crushed stone for various types of work:
Standard cushion for strip foundation, crushed stone fraction 20-40 mm
Входные данные:
Length: 8 m, Width: 10 m, Thickness: 0.2 m
Fraction: 20-40 mm
Density: 1400 kg/m³
Stock: 10%Расчёт:
Area: 8 × 10 = 80 m²
Volume: 80 × 0.2 = 16 m³
Weight: 16 × 1400 = 22,400 kg
With reserve: 16 × 1.1 = 17.6 m³
Weight with reserve: 17.6 × 1400 = 24.640 kgРезультат:
Required: 17.6 m³ (24,640 kg) crushed stone
Тип:
Pillow under the foundation
For the foundation, a fraction of 20-40 mm is recommended for better compaction
Garden path made of crushed stone, fraction 10-20 mm
Входные данные:
Length: 15 m, Width: 1 m, Thickness: 0.1 m
Fraction: 10-20 mm
Density: 1450 kg/m³
Stock: 15%Расчёт:
Area: 15 × 1 = 15 m²
Volume: 15 × 0.1 = 1.5 m³
Weight: 1.5 × 1450 = 2.175 kg
With a margin: 1.5 × 1.15 = 1.725 m³
Weight with reserve: 1.725 × 1450 = 2.501 kgРезультат:
Required: 1.725 m³ (2.501 kg) crushed stone
Тип:
garden path
For paths, a finer grain size is recommended for ease of walking.
Blind area 1 m wide around the house 10×12 m, crushed stone 20-40 mm
Входные данные:
Perimeter: 44 m, Width: 1 m, Thickness: 0.15 m
Fraction: 20-40 mm
Density: 1400 kg/m³
Stock: 10%Расчёт:
Area: 44 × 1 = 44 m²
Volume: 44 × 0.15 = 6.6 m³
Weight: 6.6 × 1400 = 9,240 kg
With reserve: 6.6 × 1.1 = 7.26 m³
Weight with reserve: 7.26 × 1400 = 10.164 kgРезультат:
Required: 7.26 m³ (10.164 kg) crushed stone
Тип:
Blind area
The blind area protects the foundation from water; the correct thickness is important
Leveling bedding for paving slabs, coarse fraction
Входные данные:
Area: 300 m², Thickness: 0.08 m
Fraction: 20-40 mm
Density: 1400 kg/m³
Stock: 5%Расчёт:
Volume: 300 × 0.08 = 24 m³
Weight: 24 × 1400 = 33,600 kg
With reserve: 24 × 1.05 = 25.2 m³
Weight with reserve: 25.2 × 1400 = 35.280 kgРезультат:
Required: 25.2 m³ (35,280 kg) crushed stone
Тип:
Backfill under tiles
For backfilling under tiles, uniform layer thickness is important.
Decorative path made of fine crushed stone 5-10 mm
Входные данные:
Length: 10 m, Width: 0.8 m, Thickness: 0.05 m
Fraction: 5-10 mm
Density: 1500 kg/m³
Stock: 20%Расчёт:
Area: 10 × 0.8 = 8 m²
Volume: 8 × 0.05 = 0.4 m³
Weight: 0.4 × 1500 = 600 kg
With a margin: 0.4 × 1.2 = 0.48 m³
Weight with reserve: 0.48 × 1500 = 720 kgРезультат:
Required: 0.48 m³ (720 kg) crushed stone
Тип:
Decorative path
Small crushed stone is used for decorative purposes
Leveling a large area, volume 50 m³
Входные данные:
Volume: 50 m³
Fraction: 40-70 mm
Density: 1350 kg/m³
Stock: 10%Расчёт:
Weight: 50 × 1350 = 67,500 kg
With reserve: 50 × 1.1 = 55 m³
Weight with reserve: 55 × 1350 = 74.250 kgРезультат:
Required: 55 m³ (74.250 kg) crushed stone
Тип:
Site filling
For large volumes, it is more profitable to order crushed stone in tons with delivery
Calculating the amount of crushed stone includes several stages to obtain an accurate result, taking into account all work parameters and material characteristics.
Различные виды строительных работ с использованием щебня:
Толщина: 0.15-0.2 м
Толщина: 0.1-0.15 м
Толщина: 0.1-0.2 м
Толщина: 0.05-0.1 м
Различные фракции щебня и их плотность:
1500 кг/м³
1450 кг/м³
1400 кг/м³
1350 кг/м³
Расчёт объёма щебня по площади и толщине слоя или напрямую по объёму
Расчёт веса щебня с учётом фракции и плотности материала
Выбор фракции щебня с автоматическим определением плотности
Учёт запаса материала для компенсации усадки при трамбовке
Высокая точность расчётов на основе строительных стандартов
Using a crushed stone calculator provides many advantages when planning construction work: accurate calculation of the amount of material, cost savings, correct choice of fraction, waste minimization.
Точный расчёт количества щебня с учётом всех параметров работ
Экономия на покупке лишнего материала, оптимизация затрат
Правильное планирование закупок и доставки материала
Удобный и быстрый расчёт без необходимости сложных вычислений
To get an accurate result, follow our recommendations when calculating crushed stone.
Carefully measure all dimensions of the area
Choose the right fraction for the type of work
Always add a margin of 10-15%
Consider shrinkage when tamping
For a pillow under the foundation, calculate the area of the foundation and multiply by the thickness of the layer (usually 0.15-0.2 m). Example: foundation 8x10 m, thickness 0.2 m → area 80 m², volume 16 m³. With a margin of 10%: 17.6 m³ of crushed stone.
For the foundation cushion, crushed stone of a fraction of 20-40 mm is usually used. This fraction compacts well and provides a reliable base. For concrete in the foundation, a fraction of 5-20 mm or 20-40 mm is used.
For a garden path, calculate the area (length × width) and multiply by the layer thickness (usually 0.1-0.15 m). Example: track 15×1 m, thickness 0.1 m → area 15 m², volume 1.5 m³. With a margin of 15%: 1.725 m³ of crushed stone.
The density of crushed stone depends on the fraction and rock: granite crushed stone 5-10 mm - 1500 kg/m³, 10-20 mm - 1450 kg/m³, 20-40 mm - 1400 kg/m³, 40-70 mm - 1350 kg/m³. Limestone crushed stone is usually 100-200 kg/m³ lighter.
The blind area is calculated around the perimeter of the house. Example: house 10×12 m, perimeter 44 m, width of the blind area 1 m, thickness 0.15 m → area 44 m², volume 6.6 m³. With a margin of 10%: 7.26 m³ of crushed stone.
Yes, always add a reserve of 10-15% crushed stone. The reserve takes into account shrinkage during compaction, unevenness of the site and possible losses during transportation and installation.
Volume = Weight / Density. For example, 14,000 kg of crushed stone with a density of 1,400 kg/m³ = 14,000 / 1,400 = 10 m³. For reverse calculation: Weight = Volume × Density.
Yes, different fractions are used for different jobs: 5-10 mm - decorative paths, 10-20 mm - standard paths and foundation, 20-40 mm - foundation cushion and blind area, 40-70 mm - backfill and leveling.
To backfill under paving slabs, calculate the area and multiply by the thickness of the layer (usually 0.05-0.1 m). Example: area 300 m², thickness 0.08 m → volume 24 m³. With a margin of 5%: 25.2 m³ of crushed stone.
The weight of 1 m³ of crushed stone depends on the fraction and rock: granite 5-10 mm - 1500 kg, 10-20 mm - 1450 kg, 20-40 mm - 1400 kg, 40-70 mm - 1350 kg. Limestone crushed stone is usually 100-200 kg lighter than granite.
For a large area, measure the area or enter the volume directly. If the area is large, divide it into sections and calculate separately. Don't forget to add a margin of 10-15% for shrinkage.
Yes, sometimes different fractions are mixed for better compaction. For example, for a foundation cushion they can use a mixture of 20-40 mm and 40-70 mm in a 70/30 ratio. The calculator allows you to specify the average density of the mixture.
Shrinkage of crushed stone during compaction is usually 10-15%. This is taken into account in the material stock. If the reserve is not specified separately, it is recommended to add 10-15% to the calculated volume.
The thickness of the foundation cushion is usually 0.15-0.2 m for a strip foundation and 0.2-0.3 m for a slab foundation. For concrete preparation under the foundation, the layer of crushed stone can be 0.1-0.15 m.
Perimeter of the house for the blind area = 2 × (Length + Width). Example: house 10 × 12 m → perimeter = 2 × (10 + 12) = 44 m. Blind area = Perimeter × Blind area width.
Depends on the thickness of the layer. With a thickness of 0.1 m: 1 m² × 0.1 m = 0.1 m³. With a density of 1450 kg/m³, this is 145 kg of crushed stone. With a thickness of 0.15 m: 0.15 m³ or 217.5 kg per 1 m².
For garden paths, a fraction of 10-20 mm or 20-40 mm is recommended. The fine fraction is more comfortable for walking, the coarse fraction allows water to pass through better. For decorative paths you can use 5-10 mm.
To level, measure the area of the site and the average depth of holes or differences in height. Volume = Area × Average thickness. Add a margin of 10-15% for shrinkage during compaction.
It is recommended to use crushed stone for the foundation cushion, as it drains water better and does not shrink. Sand can be used as an additional layer on top of crushed stone.
Cost = Volume × Price per m³ or Weight × Price per ton. Example: 17.6 m³ of crushed stone for 1500 ₽/m³ = 26,400 ₽. Or 24,640 kg (24.64 t) at 2000 ₽/t = 49,280 ₽.
Crushed stone is obtained by crushing rocks; it has sharp edges. Gravel is a natural material with rounded grains. Crushed stone is usually used for construction, and gravel for decoration. Density and calculation are similar.
Crushed stone is transported by dump trucks, measuring volume in m³ or weight in tons. A standard dump truck transports 10-20 m³ of crushed stone. When ordering, please indicate the volume or weight for the correct selection of transport.
Yes, crushed stone must be compacted (tamped) after laying. When compacting, shrinkage occurs by 10-15%, which must be taken into account when calculating. The compaction ensures the strength and stability of the base.
For drainage, large crushed stone of a fraction of 20-40 mm or 40-70 mm is used. Calculate the volume of the trench: length × width × depth. Example: trench 50×0.5×0.5 m = 12.5 m³. With a margin of 10%: 13.75 m³.
Recycled crushed stone (from crushed concrete) can be used for bedding and paths, but not for a foundation cushion. The density of secondary crushed stone is slightly lower, about 1200-1300 kg/m³.
For parking, calculate the area and multiply by the thickness of the layer (usually 0.2-0.25 m). Example: parking 20×10 m, thickness 0.2 m → area 200 m², volume 40 m³. With a margin of 10%: 44 m³ of crushed stone.
The thickness of a crushed stone blind area is usually 0.1-0.2 m. For reliable protection of the foundation, a thickness of 0.15-0.2 m is recommended. The width of the blind area should be at least 0.6-0.8 m.
For sloped areas, calculate the average layer thickness. If the slope is significant, divide the site into parts and calculate each separately. The slope of the blind area is usually 2-5% of the foundation.
To backfill under a fence, calculate the length of the fence, the width of the backfill and the thickness of the layer. Example: fence 50 m, bedding width 0.5 m, thickness 0.1 m → area 25 m², volume 2.5 m³. With a margin of 10%: 2.75 m³.
For concrete, crushed stone is included in the mixture. Typically the proportion is 1:3:5 (cement:sand:crushed stone). To calculate crushed stone in concrete, use a concrete calculator, which takes into account all components of the mixture.