📂 Line-item clarity
Every estimate includes material SKUs, crew productivity, taxes, and contingency logic for easy review.
100% Free Professional Tools • No Signup • Unlimited Use
Professional Construction Cost Estimation
CostFlowAI delivers accurate, data-driven construction cost calculators with regional pricing, contingency planning, and professional takeoffs that help contractors close projects faster.
- 12 Free Calculators
- Professional construction cost estimators for concrete, drywall, roofing, and more.
- Instant Results
- Get accurate material quantities and cost estimates in seconds.
- 100% Free to Use
- No signup required. Start estimating your next project immediately.
Professional Construction Calculators
Generate precise material lists, labor projections, and contingency budgets with calculators engineered for builders, remodelers, and project managers.
🏗️ Concrete Calculator
Calculate volume, materials, and costs for slabs, foundations, and pours.
Calculate Concrete🏠 Flooring Calculator
Calculate materials and costs for laminate, hardwood, tile, and carpet installations.
Calculate Flooring⚒️ Rebar Calculator
Calculate reinforcement requirements for concrete structures and slabs.
Calculate Rebar🏗️ Excavation Calculator
Calculate digging, hauling, and disposal costs for site preparation.
Calculate Excavation🪨 Gravel Calculator
Calculate tonnage and costs for driveways, walkways, and landscaping.
Calculate Gravel📐 Drywall Calculator
Estimate drywall sheets, mud, and labor for interior construction.
Calculate Drywall🎨 Paint Calculator
Calculate paint quantities and coverage for interior and exterior projects.
Calculate Paint🏠 Insulation Calculator
Calculate R-value requirements and costs for energy-efficient construction.
Calculate Insulation🏘️ Roofing Calculator
Estimate shingles, materials, and costs for all roofing projects.
Calculate RoofingRadically Transparent, Audit-Ready Outputs
🧾 Shareable audit trail
Download time-stamped PDF and CSV exports that annotate all assumptions for internal approvals.
🛰️ Regional data intelligence
ZIP-level multipliers and supplier feeds refresh nightly so teams stay aligned with market reality.
Why Choose CostFlowAI?
⚡ Instant Results
Get accurate calculations in seconds with our proven construction formulas.
📊 Detailed Breakdown
Comprehensive cost analysis with material, labor, and subcontractor breakdowns.
📄 Export Ready
Export calculations to PDF, CSV, or print-ready takeoffs in a single click.
🎯 Professional Accuracy
Industry-standard formulas with automatic waste factors and contingency recommendations.
Why Is CostFlowAI Completely Free?
Built by a construction project manager who believes professional-grade estimating tools should be accessible to everyone in the industry—from solo contractors to large teams.
🚫 No Paywalls
Unlimited calculations, unlimited exports, unlimited users. Forever.
🔒 No Data Selling
Your project data stays private. We don't sell your information or spam you with ads.
💳 No Credit Card
No signup required, no premium tiers, no hidden fees. Just calculators that work.
🤝 Community First
Better estimates mean better projects. We're here to support the construction community.
Our Free Forever Promise: CostFlowAI will always be 100% free. No bait-and-switch, no "freemium" upsells. Professional tools for all contractors.
How CostFlowAI Simplifies Construction Costing
1. Enter Project Details
Add dimensions, material preferences, and crew rates. Our calculators handle complex formulas and convert units automatically.
2. Review Regional Pricing
Adjust costs by ZIP code or state to reflect local labor rates, material availability, and seasonal trends.
3. Deliver Shareable Estimates
Export polished estimates with contingency allowances so clients see exactly how budgets were calculated.
Popular Cost Planning Guides
Expand your estimating expertise with tutorials that explain pricing drivers, codes, and best practices for every trade.
Concrete Estimating Best Practices
Understand mix design, formwork allowances, and waste factors before you pour.
Read the concrete estimating guideRoofing Cost Breakdown
Compare shingle types, tear-off costs, and crew production rates for accurate bids.
Explore the roofing estimator walkthroughElectrical Rough-In Budgeting
Plan circuits, conduit, and fixture allowances with confidence for residential builds.
Master electrical rough-in calculationsDeliver airtight budgets on your next proposal
Pair CostFlowAI's calculators with localized insights to present client-ready budgets in minutes and keep every stakeholder confident from bid to punch list.
Build an estimate nowConstruction Cost Estimation FAQs
- How accurate are CostFlowAI's construction calculators?
- Our calculators use industry formulas, waste factors, and regional cost multipliers. Accuracy depends on the quality of your inputs, but most contractors see estimates within 5-10% of final project costs.
- Can I export cost estimates for clients?
- Yes. Download PDF or CSV reports with line-item materials, labor hours, markups, and contingency allowances so clients understand every component of the bid.
- Do the calculators account for regional pricing differences?
- Simply input your project location to adjust labor rates, material availability, and taxes. We update the data regularly so your pricing reflects current market conditions.