Calculate Volume, Materials & Cost | All Shapes Supported
✓ 5 Shapes - Slabs, columns, walls
✓ Materials - Cement, sand, aggregate
✓ 4 Mix Ratios - 1:1.5:3 to 1:4:8
✓ Cost Estimate - Full breakdown
Calculate Volume | Materials | Cost | Multiple Shapes Supported
Concrete Calculator: Calculate volume, materials (cement, sand, aggregate), and cost for your construction project.
💡 Tip: Select shape, enter dimensions, choose mix ratio, and get instant calculations!
4 inches = 0.33 ft, 6 inches = 0.5 ft
No history yet
1:1.5:3 (High)
Columns, beams, M25-M30
1:2:4 (Standard)
Slabs, foundations, M15-M20
1:3:6 (Medium)
Mass concrete, M10
1:4:8 (Low)
Lean concrete, M7.5
Calculate concrete for rectangular slabs, circular slabs, walls, square columns, and round columns with accurate volume calculations for each shape.
Get exact quantities of cement (in bags and kg), sand (in cubic feet and tons), and aggregate (in cubic feet and tons) based on your selected mix ratio.
Calculate total project cost with customizable prices for cement, sand, and aggregate. Get itemized cost breakdown and total estimation.
A Concrete Calculator is essential construction tool calculating concrete volume materials cost needed building projects concrete mixture cement sand aggregate water forming strong durable construction material used foundations slabs driveways patios walls columns sidewalks practically every construction project calculator determining exact quantities materials required preventing waste saving money ensuring project completion concrete measured volume cubic yards cubic feet cubic meters depending location calculation requiring accurate dimensions length width thickness diameter height shape standard concrete composition cement binder holding everything together typically Portland cement sand fine aggregate filling small spaces providing workability aggregate coarse aggregate gravel crushed stone providing bulk strength water activating cement creating chemical reaction hardening concrete mix ratios expressing proportions cement sand aggregate common ratios 1:2:4 standard mix one part cement two parts sand four parts aggregate 1:1.5:3 high strength mix more cement stronger concrete 1:3:6 medium strength less cement economical 1:4:8 lean concrete minimal cement non-structural uses calculator supporting all standard mix ratios automatic material calculations volume calculation fundamental requiring shape-specific formulas rectangular slab length times width times thickness circular slab pi times radius squared times thickness wall length times height times thickness columns similar calculations vertical structures calculator handling all geometries automatically converting between units feet inches meters accommodating different measurement preferences making concrete calculator indispensable tool construction professionals DIY homeowners contractors engineers anyone planning concrete project.
Our Free Concrete Calculator 2025 offers comprehensive advanced features exceptional functionality multiple shape support rectangular slabs most common shape driveways patios garage floors foundations dimensions length width thickness calculator computing volume cubic units circular slabs round patios pool surrounds tree rings using diameter thickness automatic pi calculation accurate curved measurements walls retaining walls fences foundation walls using length height thickness vertical structure calculations columns square columns pillars posts using width length height round columns cylindrical pillars using diameter height cylindrical volume formulas unit flexibility supporting feet most common US measurements inches detail work precision meters international metric system automatic conversions between all units displaying results cubic yards standard ready-mix concrete ordering unit cubic feet intermediate calculations common construction measurements cubic meters international standard metric volume mix ratio selection four standard ratios high strength 1:1.5:3 structural elements load-bearing applications standard 1:2:4 general construction slabs foundations most versatile medium 1:3:6 non-critical mass concrete economical option lean 1:4:8 base leveling minimal structural requirements material calculations cement bags standard 50kg bags quantity total kilograms sand cubic feet volume tons weight aggregate cubic feet volume tons weight all materials calculated proportionally selected mix ratio waste factor adjustment default five percent customizable up fifteen percent accounting spillage uneven ground measurement errors absorption formwork accounting realistic site conditions cost estimation customizable prices cement per bag sand per ton aggregate per ton individual material costs subtotals total project cost helping budget planning supplier comparison financial planning calculation history tracking last ten calculations quick reference comparing different options reviewing previous estimates project planning example values providing sample dimensions each shape type quick testing learning understanding typical measurements mobile responsive design adapting screen sizes smartphones tablets desktops touch-friendly inputs clear displays ensuring usability accessibility anywhere anytime making most powerful comprehensive accurate user-friendly concrete calculator available online completely free unlimited calculations supporting construction projects worldwide helping builders contractors homeowners save money avoid waste plan accurately ensure successful project completion.
| Mix Ratio | Grade | Strength | Best Used For |
|---|---|---|---|
| 1:1.5:3 | M25-M30 | High Strength | Columns, beams, load-bearing structures |
| 1:2:4 | M15-M20 | Standard | Slabs, foundations, driveways, patios |
| 1:3:6 | M10 | Medium | Mass concrete, non-structural work |
| 1:4:8 | M7.5 | Low Strength | Leveling, bedding, lean concrete |
Formula: Length × Width × Thickness. Example: 10ft × 10ft × 4in (0.33ft) = 33 ft³ = 1.22 yd³. Calculator shows volume in yd³, ft³, m³, plus materials (cement bags, sand tons, aggregate tons) and total cost. For driveways: 4-6 inch thickness. Patios: 3-4 inch. Add 5-10% waste factor. Calculator handles all conversions and material calculations automatically.
Mix ratios (cement:sand:aggregate): 1:1.5:3 (High Strength) - columns, beams, M25-M30 grade. 1:2:4 (Standard) - slabs, foundations, driveways, M15-M20, most common. 1:3:6 (Medium) - mass concrete, M10. 1:4:8 (Lean) - leveling, base, M7.5. Choose based on: structural elements→1:1.5:3, standard slabs→1:2:4, non-critical→1:3:6. Calculator provides materials for each ratio with cost comparison.
Standard: 1 yd³ concrete ≈ 45 bags cement (50kg) for 1:2:4 mix. Varies by ratio: 1:1.5:3→~60 bags/yd³, 1:2:4→~45 bags/yd³, 1:3:6→~35 bags/yd³. Example: 10×10×4in slab = 1.22 yd³ = 55 bags + 5% waste = 58 bags. Calculator shows exact bags needed, total kg, and cost. 1 bag covers ~4-5 sq ft at 4 inch thickness.
Formula: π × radius² × thickness. Example: 12ft diameter patio, 4in thick. Radius = 6ft. Volume = 3.14159 × 6² × 0.33 = 37.3 ft³ = 1.38 yd³. Use for: round patios, tree rings, circular driveways, pool surrounds. Calculator handles automatic π calculation. Add 5-10% extra for curved cuts. Shows exact volume, materials, cost for all circular projects.
Cost varies: Materials (1:2:4): Cement ~45 bags×₹400 = ₹18,000. Sand ~0.45 tons. Aggregate ~0.9 tons. Total: ₹18,000-₹24,000/yd³. Ready-mix: M20 ₹3,500-₹5,000/m³, M25 ₹4,000-₹6,000/m³. Factors: location, mix ratio, quantity, delivery. Calculator provides detailed cost breakdown. Example: 10×10 driveway = 1.2 yd³ = ₹21,600-₹29,000 materials.
WALLS: Length × Height × Thickness. Example: 20ft × 8ft × 8in = 107.2 ft³ = 3.97 yd³. SQUARE COLUMNS: Width × Length × Height. Example: 1ft × 1ft × 10ft = 10 ft³ = 0.37 yd³. ROUND COLUMNS: π × r² × Height. Example: 12in dia × 10ft = 7.85 ft³ = 0.29 yd³. Columns use 1:1.5:3 high-strength mix. Calculator handles all vertical structures with automatic formula selection.
Waste factor accounts for spillage, uneven ground, formwork gaps. Standard: 5% ideal conditions, 7-8% normal, 10% difficult conditions, 15% very rough terrain. Example: need 10 yd³. With 5% waste: 10×1.05 = 10.5 yd³ order. Calculator includes adjustable waste factor (0-15%) applied to all materials. Better to have 5% extra than run short during pour.
Conversions: 1 yd³ = 27 ft³ = 0.765 m³. 1 ft³ = 0.037 yd³ = 0.0283 m³. 1 m³ = 35.3 ft³ = 1.31 yd³. Examples: 81 ft³ ÷ 27 = 3 yd³. 2 yd³ × 27 = 54 ft³. US uses yards for orders, dimensions in feet. Calculator converts automatically, displays all three units simultaneously, eliminates manual conversion errors.
DRIVEWAY: Width 10-12ft (single), 18-24ft (double). Length varies. Thickness 4-6in. Example: 12ft×50ft×4in = 198 ft³ = 7.33 yd³. PATIO: Small 10×10ft, Medium 12×16ft, Large 20×20ft. Thickness 3-4in. Example: 12×16×4in = 63.4 ft³ = 2.35 yd³. Calculator: select Rectangular Slab, enter dimensions, choose 1:2:4 mix, add waste, get complete materials list and cost.
100% free forever! All features: Volume calculations (yd³, ft³, m³), 5 shapes, multiple units (feet, inches, meters), 4 mix ratios, material calculations (cement bags, sand tons, aggregate tons), cost estimation with customizable prices, waste factor adjustment, calculation history, example values, mobile responsive. No registration, payment, ads, downloads, limits. Works any device/browser. Perfect for homeowners, contractors, builders, engineers. Free for everyone!
Our Free Concrete Calculator 2025 is the most advanced comprehensive concrete calculation tool supporting multiple shapes rectangular slabs circular slabs walls square columns round columns calculating concrete volume cubic yards cubic feet cubic meters materials needed cement bags sand tons aggregate tons based standard mix ratios cost estimation waste factor adjustment calculation history mobile responsive design completely free unlimited use no registration advertisements serving homeowners contractors builders engineers anyone planning concrete projects updated 2025 standards modern construction practices helping build better save money avoid waste plan accurately worldwide.