Free Construction Calculators
Professional-grade calculators built for contractors and DIY enthusiasts. Accurate estimates for concrete, roofing, flooring, and more.
Popular Calculators
Choose a calculator below to get started. All tools are free and work on any device.
Concrete Calculator
Calculate concrete volume, bags needed, and cost for slabs, footings, and columns.
Roof Pitch Calculator
Calculate roof pitch, angle, and estimate roofing materials needed.
Flooring Calculator
Calculate flooring materials needed for your room including waste factor.
Paint Calculator
Calculate how much paint you need for your walls and estimate cost.
Lumber Calculator
Calculate lumber board feet, linear feet, and cost for your woodworking or construction project.
Deck Calculator
Calculate deck materials, boards, joists, and cost for your deck building project.
Drywall Calculator
Estimate drywall panels, joint compound, tape, and screws for any room.
Fence Calculator
Calculate fence materials, posts, pickets, and cost for any fencing project.
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A visual comic diary of common DIY flooring mistakes โ from miscalculating area to skipping expansion gaps โ and how to avoid them.
How to Calculate Concrete for Your Project
Step-by-step guide with formulas and examples for slabs, footings, columns, and walls.
Concrete Slab Cost Guide
Complete breakdown of concrete slab costs, pricing factors, and real project estimates.
Roofing Materials Guide 2026
Compare asphalt shingles, metal roofing, tiles, and more. Find the best material for your project.
Why Use App Guidebook?
Built for the job site. No sign-ups, no fees, no fuss.
100% Free
All calculators are completely free. No registration, no credit card required.
Mobile Friendly
Works great on your phone or tablet right at the job site.
Accurate Results
Industry-standard formulas trusted by construction professionals.
Ready to Start Your Project?
Pick a calculator above or browse our guides to learn more.
Try Concrete Calculator