Calculation of the amount of cement, sand, crushed stone and water for preparing concrete
Calculation of the amount of cement, sand, crushed stone and water for preparing concrete
Proportions cement: sand: crushed stone
Water to cement ratio (usually 0.4-0.7)
An online concrete calculator will help you calculate the required amount of cement, sand, crushed stone and water to prepare a concrete mixture of the desired brand. The volume of concrete, the grade of concrete, the proportions of the components and the water-cement ratio are taken into account.
The concrete calculator uses precise formulas to calculate the number of components taking into account the grade of concrete, density of materials and working conditions. Suitable for calculating various grades of concrete: M100, M150, M200, M250, M300, M400. Calculation formula: Components = Volume of concrete × Density of the component × Proportion of the component / Sum of proportions.
Let's look at practical examples of calculating the number of components for various volumes and grades of concrete:
Foundation for a house, concrete grade M200, proportions 1:2.5:4.5
Входные данные:
Volume: 10 m³
Brand: M200
Proportions: 1:2.5:4.5 (cement:sand:crushed stone)
W/C: 0.5Расчёт:
Sum of proportions: 1 + 2.5 + 4.5 = 8
Cement: 10 × 1400 × 1/8 = 1750 kg
Sand: 10 × 1600 × 2.5 / 8 = 5000 kg
Crushed stone: 10 × 1400 × 4.5 / 8 = 7875 kg
Water: 1750 × 0.5 = 875 l
Cement bags: 1750 / 50 = 35 bagsРезультат:
Cement: 1750 kg, Sand: 5000 kg, Crushed stone: 7875 kg, Water: 875 l
Марка:
M200
Standard foundation for a house, brand M200 recommended
Floor screed, concrete grade M150, proportions 1:3:5
Входные данные:
Volume: 5 m³
Brand: M150
Proportions: 1:3:5 (cement:sand:crushed stone)
W/C: 0.6Расчёт:
Sum of proportions: 1 + 3 + 5 = 9
Cement: 5 × 1400 × 1/9 = 778 kg
Sand: 5 × 1600 × 3 / 9 = 2667 kg
Crushed stone: 5 × 1400 × 5 / 9 = 3889 kg
Water: 778 × 0.6 = 467 l
Cement bags: 778 / 50 = 16 bagsРезультат:
Cement: 778 kg, Sand: 2667 kg, Crushed stone: 3889 kg, Water: 467 l
Марка:
M150
Floor screed, brand M150 is enough
Overlapping between floors, concrete grade M300, proportions 1:1.5:3
Входные данные:
Volume: 15 m³
Brand: M300
Proportions: 1:1.5:3 (cement:sand:crushed stone)
W/C: 0.45Расчёт:
Sum of proportions: 1 + 1.5 + 3 = 5.5
Cement: 15 × 1400 × 1 / 5.5 = 3818 kg
Sand: 15 × 1600 × 1.5 / 5.5 = 6545 kg
Crushed stone: 15 × 1400 × 3 / 5.5 = 11455 kg
Water: 3818 × 0.45 = 1718 l
Cement bags: 3818 / 50 = 77 bagsРезультат:
Cement: 3818 kg, Sand: 6545 kg, Crushed stone: 11455 kg, Water: 1718 l
Марка:
M300
The ceiling requires high strength, the M300 grade is used
Blind area around the house, concrete grade M100, proportions 1:4:6
Входные данные:
Volume: 2 m³
Brand: M100
Proportions: 1:4:6 (cement:sand:crushed stone)
W/C: 0.7Расчёт:
Sum of proportions: 1 + 4 + 6 = 11
Cement: 2 × 1400 × 1/11 = 255 kg
Sand: 2 × 1600 × 4 / 11 = 1164 kg
Crushed stone: 2 × 1400 × 6 / 11 = 1527 kg
Water: 255 × 0.7 = 179 l
Cement bags: 255 / 50 = 6 bagsРезультат:
Cement: 255 kg, Sand: 1164 kg, Crushed stone: 1527 kg, Water: 179 l
Марка:
M100
The blind area is not loaded, M100 grade is enough
Load-bearing column, concrete grade M250, proportions 1:2:4
Входные данные:
Volume: 3 m³
Brand: M250
Proportions: 1:2:4 (cement:sand:crushed stone)
W/C: 0.5Расчёт:
Sum of proportions: 1 + 2 + 4 = 7
Cement: 3 × 1400 × 1/7 = 600 kg
Sand: 3 × 1600 × 2 / 7 = 1371 kg
Crushed stone: 3 × 1400 × 4 / 7 = 2400 kg
Water: 600 × 0.5 = 300 l
Cement bags: 600 / 50 = 12 bagsРезультат:
Cement: 600 kg, Sand: 1371 kg, Crushed stone: 2400 kg, Water: 300 l
Марка:
M250
The column is loaded, grade M250 is required
Particularly critical slab, concrete grade M400, proportions 1:1:2
Входные данные:
Volume: 20 m³
Brand: M400
Proportions: 1:1:2 (cement:sand:crushed stone)
W/C: 0.4Расчёт:
Sum of proportions: 1 + 1 + 2 = 4
Cement: 20 × 1400 × 1/4 = 7000 kg
Sand: 20 × 1600 × 1/4 = 8000 kg
Crushed stone: 20 × 1400 × 2 / 4 = 14000 kg
Water: 7000 × 0.4 = 2800 l
Cement bags: 7000 / 50 = 140 bagsРезультат:
Cement: 7000 kg, Sand: 8000 kg, Crushed stone: 14000 kg, Water: 2800 l
Марка:
M400
Particularly critical design, grade M400 required
Calculation of concrete composition includes several stages to obtain an accurate result, taking into account all parameters.
Determining the volume of concrete
Choosing a concrete grade
Calculation of component proportions
Determining the amount of water
Checking the water-cement ratio
The calculator supports the calculation of various grades of concrete taking into account their characteristics.
1:4:6
1:3:5
1:2.5:4.5
1:2:4
1:1.5:3
1:1:2
Пропорции цемента, песка и щебня для различных марок бетона:
1 часть
2-4 части
3-6 частей
0.4-0.7
Using a concrete calculator provides many advantages when planning construction: accurate calculation of the amount of materials, cost savings, procurement planning, waste minimization.
The calculator uses proven formulas taking into account all parameters to obtain an accurate result.
Correct calculation allows you to avoid overuse of materials and unnecessary costs for the purchase of unnecessary components.
Knowing in advance the required amount of materials, you can plan the budget and purchases for construction.
The calculator's simple and intuitive interface allows you to quickly calculate the required amount of materials.
To get an accurate result, follow our recommendations when calculating concrete.
To calculate concrete, indicate the volume of concrete in m³ or liters, select the grade of concrete (M100, M150, M200, M250, M300, M400), set the proportions of the components and the water-cement ratio. The calculator will automatically calculate the required amount of cement, sand, crushed stone and water.
The amount of cement depends on the brand of concrete and proportions. For M200 (proportions 1:2.5:4.5) you need approximately 250-300 kg of cement per 1 m³. For M300 (proportions 1:1.5:3) you need approximately 350-400 kg of cement per 1 m³.
M100: 1:4:6 (cement:sand:crushed stone), M150: 1:3:5, M200: 1:2.5:4.5, M250: 1:2:4, M300: 1:1.5:3, M400: 1:1:2. Proportions may vary depending on the quality of materials.
For the foundation, measure the volume of the foundation (length × width × height). Use brand M200 for one-story houses or M250-M300 for multi-story houses. Enter the proportions in the calculator and get the required number of components.
The weight of 1 m³ of concrete depends on the brand and proportions. The average weight is 2300-2500 kg/m³. Light concrete weighs 1800-2000 kg/m³, heavy concrete - 2500-2700 kg/m³.
To screed the floor, measure the floor area and the thickness of the screed. Volume = Area × Thickness. Use brand M150-M200. The proportions are usually 1:3:5 (cement:sand:crushed stone). Enter the data into the calculator.
Water-cement ratio (W/C) is the ratio of the mass of water to the mass of cement. Usually it is 0.4-0.7. The lower the W/C, the stronger the concrete, but the more difficult it is to mix. For M200, W/C = 0.5-0.6 is recommended.
For walls, measure the volume of the walls (length × height × thickness). Use grade M200-M250 for load-bearing walls and M150-M200 for non-load-bearing walls. Specify the proportions and get the number of components.
The number of bags depends on the brand of concrete. For M200 you need approximately 5-6 bags of 50 kg per 1 m³. For M300 you need approximately 7-8 bags of 50 kg per 1 m³.
For slabs, measure the volume of the slab (area × thickness). Use grade M250-M300 for floors. The proportions are usually 1:2:4 or 1:1.5:3. Enter the data into the calculator.
The grade of concrete (M100, M150, M200, etc.) shows the compressive strength in kg/cm². M100 is the weakest, M400 is the strongest. The higher the grade, the more cement is required and the higher the strength.
For the blind area, measure the volume (width × length × thickness). Use brand M100-M150. The proportions are usually 1:4:6 (cement:sand:crushed stone). Enter the data into the calculator.
The amount of sand depends on the brand of concrete and proportions. For M200 (proportions 1:2.5:4.5) you need approximately 600-800 kg of sand per 1 m³. For M300 (proportions 1:1.5:3) you need approximately 500-600 kg of sand per 1 m³.
For a column, measure the volume of the column (area x height). Use grade M250-M300 for load-bearing columns. The proportions are usually 1:2:4 or 1:1.5:3. Enter the data into the calculator.
The amount of crushed stone depends on the brand of concrete and proportions. For M200 (proportions 1:2.5:4.5) you need approximately 1200-1400 kg of crushed stone per 1 m³. For M300 (proportions 1:1.5:3) you need approximately 1000-1200 kg of crushed stone per 1 m³.
For a slab, measure the volume of the slab (length x width x thickness). Use grade M200-M300 depending on the load. Specify the proportions and get the number of components.
Crushed stone fraction is the size of the grains. For concrete, crushed stone of a fraction of 5-20 mm or 20-40 mm is usually used. Small crushed stone fills voids better, coarse crushed stone produces more durable concrete.
For stairs, measure the volume of all steps and landings. Use brand M200-M250. The proportions are usually 1:2.5:4.5 or 1:2:4. Enter the data into the calculator.
The amount of water depends on the water-cement ratio and the amount of cement. For M200 with W/C = 0.5 you need approximately 125-150 liters of water per 1 m³. For M300 with W/C = 0.45 you need approximately 160-180 liters of water per 1 m³.
For the fence, measure the volume of the pillars and foundation strip. Use brand M150-M200. The proportions are usually 1:3:5 or 1:2.5:4.5. Enter the data into the calculator.
For the foundation of a one-story house, M200 is enough. For a two-story house use M250-M300. For multi-storey buildings use M300-M400. The brand depends on the load and soil.
For the basement, measure the volume of the walls and floor. Use grade M200-M250 for walls and M150-M200 for floors. Specify the proportions and get the number of components.
Concrete gains strength gradually. After 7 days, the strength is 70% of the design, after 28 days - 100%. To gain strength, humidity and temperatures above 0°C are required.
For the track, measure the volume (width × length × thickness). Use brand M150-M200. The proportions are usually 1:3:5. The thickness of the track is usually 5-10 cm.
The mobility of concrete (P1, P2, P3, P4, P5) shows the fluidity of the mixture. P1 is a rigid mixture, P5 is very fluid. For normal work, P2-P3 is used, for pouring into formwork - P3-P4.
For a pool, measure the volume of the bowl and walls. Use grade M300-M400 with waterproof additives. The proportions are usually 1:1.5:3 or 1:1:2. Special concrete for swimming pools is required.
The cost of 1 m³ of concrete depends on the brand and region. M200 costs approximately 3500-4500 rub/m³, M300 - 4000-5000 rub/m³, M400 - 4500-5500 rub/m³. If you prepare it yourself, the cost is lower.
For a garage, measure the volume of the floor and walls. Use grade M200 for floors and walls. The proportions are usually 1:2.5:4.5. Enter the data into the calculator.
Concrete class (B7.5, B10, B15, B20, etc.) is a strength characteristic. Class B15 corresponds to grade M200, B20 - M250, B25 - M300. The class shows guaranteed strength.
For monolithic construction, measure the volume of all elements (walls, floors, columns). Use brand M250-M300. The proportions are usually 1:2:4 or 1:1.5:3. Add up the results for the total.