Line-item clarity
Every estimate includes line-item material quantities, labor hours, waste factors, and contingency allowances for easy review.
Construction Cost Calculators
Estimate materials, labor, and total project costs. Free tools built for contractors and project managers.
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Quick estimates in seconds
- 21 Free Calculators
- Professional construction budget calculators for concrete, drywall, roofing, kitchen remodeling, and more.
- Instant Results
- Get material quantities and budget ranges in seconds.
- 100% Free to Use
- No signup required. Start planning your next project immediately.
21Calculators
5Categories
3Export Formats
FreeForever
Professional Construction Calculators
Generate precise material lists, labor projections, and contingency budgets with calculators engineered for builders, remodelers, and project managers.
Radically Transparent, Audit-Ready Outputs
Shareable audit trail
Print-ready estimates with timestamped assumptions and regional pricing for internal approvals.
Regional data intelligence
Pricing based on RSMeans 2025 construction cost data with state-level regional cost multipliers based on BLS and RSMeans regional indices.
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
Print or save your detailed estimates with full cost breakdowns in a single click.
Professional Accuracy
Industry-standard formulas with automatic waste factors and contingency recommendations.
Why Is CostFlowAI Completely Free?
After years of running projects and watching estimating software charge ridiculous fees for basic calculations, we built what we wished existed. Core calculators — free forever. Just tools that work the way contractors actually think.
No Paywalls
Unlimited calculations for unlimited projects.
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 hidden fees, no paywalls on calculators. Just tools that work.
Community First
Better estimates mean better projects. We're here to support the construction community.
Free Forever Promise: All calculators free, forever. No signup required. No bait-and-switch. Core tools free, forever. Professional calculators 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 state to reflect regional 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 Foundation Costs
Understand mix design, formwork allowances, and waste factors before you pour.
Read the concrete estimating guideRoofing Material Costs
Compare shingle types, tear-off costs, and crew production rates for accurate bids.
Explore the roofing estimator walkthroughFraming Cost Guide
Estimate lumber, studs, and plates for wall framing projects with confidence.
Explore the framing cost guideDeliver 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
Our calculators use industry formulas from RSMeans, NAHB, and Bureau of Labor Statistics data, combined with regional cost multipliers and standard waste factors. Most contractors see estimates within 5-10% of final project costs when inputs are accurate.
Yes. Print or save your detailed estimates with full cost breakdowns. Our 'Show Math' feature lets clients see exactly how each number was calculated.
Absolutely. Select your state to automatically adjust for regional labor rates and material costs based on state-level construction data. We update pricing data regularly to reflect current market reality.
Yes - our Free Forever Promise means core calculator functionality will always be free. No bait-and-switch, no surprise paywalls. We built this for the construction community.
Quick mode uses 4-5 essential inputs for fast ballpark estimates. Professional mode unlocks 12-20 additional parameters for detailed takeoffs including labor rates, waste factors, and equipment costs.