Get precise material estimates for concrete, gravel, decking, fencing, and more. Our professional-grade calculators eliminate guesswork, prevent over-ordering, and help you budget correctly-free for contractors and DIYers.
Explore CalculatorsChoose from our professional-grade calculators designed for accuracy and ease of use.
Calculate cubic yards, cubic feet, and bags needed for slabs, footings, and columns.
Estimate deck boards, joists, footings, and hardware for your deck project.
Calculate posts, panels, pickets, and materials needed for fencing projects.
Determine gallons of paint needed for walls, ceilings, and trim based on room dimensions.
These are the most searched-for calculations in the concrete, gravel, and paver niche. Get instant answers to these common questions:
Calculate exact concrete needs for slabs, patios, and foundations. Includes thickness recommendations, waste factors, and cost estimates.
Proper gravel depth prevents potholes and washouts. Learn base vs. surface layers, compaction requirements, and material calculations.
Calculate pavers, gravel base, sand bedding, and joint sand for patios and walkways. Includes pattern waste factors and installation tips.
How many bags of concrete per square foot? Calculate exact bag counts for slabs, patios, and foundations based on thickness.
Calculate exact pavers, base gravel, sand, and edge restraint for any patio size. Includes pattern waste factors and cost estimates.
Need a different calculation? Browse our complete calculator collection or contact us for specific project help.
Get quick answers to frequently asked questions with links to detailed guides and calculators.
A 10x10 slab at 4 inches thick requires 1.35 cubic yards of concrete (about 61 80-lb bags). Add 10-15% extra for waste, uneven subgrade, and spillage. Use our concrete calculator for exact amounts based on your specific dimensions and thickness.
Detailed guide: Concrete Slab Calculation Guide
One 80-lb bag yields about 0.6 cubic feet. A cubic yard (27 cubic feet) requires 45 bags. For small projects under 1 yard, bagged concrete is practical; for larger pours, ready-mix is more economical. Our concrete calculator includes bag options.
Detailed guide: Concrete Bag Calculator Guide
A proper gravel driveway needs 6-9 inches total: 4-6 inches of compacted base (crushed stone) plus 2-3 inches of surface gravel. Less depth leads to potholes and rutting. Calculate exact amounts with our gravel calculator.
Detailed guide: Gravel Driveway Depth Guide
Paver bases require 4-6 inches of compacted gravel plus 1 inch of leveling sand. Driveways need 8-12 inches. Proper base prevents settling and frost heave. Use our paver calculator for complete material estimates.
Detailed guide: Paver Base Depth Guide
Concrete costs $120-$180 per cubic yard for standard 3000-psi mix (2026 prices). Total project costs include delivery, labor, base materials, and reinforcement. Get accurate estimates with our concrete calculator.
Detailed guide: Concrete Cost Estimator Guide
Use angular crushed stone or #304 limestone-these lock when compacted. Avoid pea gravel or river rock (too smooth, shifts under weight). Learn about all gravel types in our comprehensive guide.
Detailed guide: Gravel Types Guide
More questions? Browse our complete guide collection or use our calculators for precise answers to your specific project.
Get exact material calculations for the most frequently built projects. Click any project for detailed guide with step-by-step calculations.
Concrete: 1.25-1.5 cubic yards
Base gravel: 1.25-2 tons
Cost range: $400-$800 (DIY)
Detailed CalculationConcrete: 4.9-5.5 cubic yards
Base gravel: 7-8 tons
Cost range: $1,300-$2,500 (DIY)
Detailed CalculationConcrete: 7.1-7.8 cubic yards
Base gravel: 12-15 tons
Cost range: $1,800-$3,500 (DIY)
Detailed CalculationConcrete: 11.1-12.2 cubic yards
Base gravel: 22-25 tons
Cost range: $2,900-$5,500 (DIY)
Detailed CalculationConcrete: 3-3.5 cubic yards
Base gravel: 4-5 tons
Cost range: $1,200-$2,400 (DIY)
Detailed CalculationGravel: 15-18 tons
Depth: 6-8 inches compacted
Cost range: $750-$1,500 (DIY)
Detailed CalculationPavers: 850-950 (4x8 size)
Base materials: 4-5 tons gravel + 30-40 bags sand
Cost range: $1,200-$2,400 (DIY)
Detailed CalculationGravel: 18-22 tons
Concrete (alternative): 6.5-7.5 cubic yards
Cost range: $1,500-$3,000 (gravel) / $3,000-$6,000 (concrete)
All Driveway CalculatorsNot seeing your exact project? Use our calculators for any size or shape:
Concrete: 4.0-4.5 cubic yards
Base gravel: 6-8 tons
Cost range: $1,050-$2,000 (DIY)
Detailed CalculationTypical size: 10x12 shed
Concrete: 1.5-1.75 cubic yards
Cost range: $400-$800 (DIY)
Detailed CalculationSingle car: 14.5-15 tons
Double car: 29-32 tons
Cost range: $630-$1,700 (DIY)
Detailed Calculation6x9 pavers: 425 pavers
Base materials: 2 tons gravel + 25 bags sand
Cost range: $900-$3,000 (DIY)
Detailed CalculationLearn from others' expensive errors. These guides reveal the most frequent project failures and how to prevent them.
10 most common errors that ruin concrete slabs, patios, and driveways.
10 most common errors that destroy gravel driveways and landscaping.
10 most common errors that ruin paver patios, walkways, and driveways.
Save time and money: Reading these mistake guides before starting your project can prevent costly errors and rework.
Our calculators are trusted by thousands of construction professionals and DIY homeowners across the United States. Whether you're a seasoned contractor or tackling your first home improvement project, our tools provide the accuracy you need.
General contractors, concrete specialists, landscapers, and remodeling pros use our calculators to generate quick, reliable estimates for clients, reduce material waste, and improve project profitability.
Weekend warriors and hands-on homeowners rely on our calculators to plan projects confidently, avoid multiple hardware-store trips, and stay within budget.
Small-scale builders and property developers leverage our calculators for preliminary budgeting, subcontractor verification, and site-material planning.
Every calculator on Contractor Calculator Pro is built using industry-standard formulas and real-world construction practices. We don't just multiply length x width x depth-we account for waste factors, unit conversions, compaction, and practical variables that affect material needs.
Example: Our concrete calculator doesn't just give you cubic yards; it tells you how many 60-lb or 80-lb bags you'll need, includes a recommended waste percentage, and even provides cost approximations based on local material prices.
We continuously update our formulas based on feedback from working contractors and new building-code requirements. That means you're always getting calculations that reflect current best practices, not generic online estimates.
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