Construction Tools

100 free tools built for contractors, estimators, and project managers.

This is a working toolbox, not a directory: material takeoffs, estimating and bid math, contract documents, cash-flow trackers, safety forms, and scheduling calculators — all of it free, with no account and no usage limits. Every tool runs entirely in your browser, so your numbers, clients, and documents never leave your device. Anything you save lives in your browser's local storage, and document tools print clean for "Save as PDF."

The tools also work together. Run a concrete, drywall, or lumber takeoff and push the result straight into the Invoice or Estimate generator as a line item; carry an estimate into a bid, a bid into a proposal, a pay application into a lien waiver. Pin the tools you use daily, and your recently used tools surface at the top on your next visit. If you can't find something, search by what your crew calls it — "sheetrock," "G702," or "footings" all land in the right place.

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local_fire_departmentPopular

calculate

Cost Estimator

Estimate costs by building type, state, and quality level.

deck

Deck

Boards, joists, posts, beams, railing — PT, cedar, composite.

roofing

Roof Pitch

Rise/run to degrees, rafter length, and area multiplier.

foundation

Concrete

Cubic yards, bags, and ready-mix cost for slabs, footings, columns.

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Labor Burden

Fully-loaded labor cost per hour — taxes, comp, benefits, PTO.

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Markup & Margin

Convert between markup % and margin %. Avoid the pricing mistake.

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Invoice Generator

Create professional invoices with line items, tax, and payment tracking.

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Estimate Generator

Build job estimates with contingency, markup, and scope of work.

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Bid a job

Price the work, mark it up, and send a signable proposal.

Bill the work

Apply for payment, invoice the balance, and clear the lien.

Run payroll week

Collect hours, compute overtime, and prep the payroll run.

Time Card
arrow_forwardOvertime Calculator
arrow_forwardPayroll Prep

Start a safe job

Analyze the hazards, brief the crew, and document the walk.

Money & Documents

Generate the paperwork that gets you paid — invoices, estimates, and the pricing math behind them.

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Invoice Generator

Create professional invoices with line items, tax, and payment tracking.

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Estimate Generator

Build job estimates with contingency, markup, and scope of work.

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Change Order

Generate change orders with contract adjustments and schedule impact.

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Lien Waiver Generator

State-specific lien waivers — conditional, unconditional, partial, final.

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Markup & Margin

Convert between markup % and margin %. Avoid the pricing mistake.

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Labor Burden

Fully-loaded labor cost per hour — taxes, comp, benefits, PTO.

Contracts & Notices

Fill-in contract documents and formal notices that keep projects documented and defensible.

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Pay Application (G702/G703)NEW

Schedule of values, % complete per line, retainage. Print for owner/architect.

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Proposal GeneratorNEW

Branded proposal: scope, price, terms, signature block. Save and print.

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Subcontractor AgreementNEW

Fill-in sub contract: parties, scope, price, insurance, indemnification.

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Notice to ProceedNEW

Formal authorization to commence work with commencement and completion dates.

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Substantial CompletionNEW

Milestone certificate with punch list reference and warranty start.

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Warranty CertificateNEW

Workmanship warranty: scope, term, exclusions, claim procedure.

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Subcontractor Back-ChargeNEW

Document costs charged to a sub: reason, line-item backup, acknowledgment.

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Punch ListNEW

Itemized: location, trade, status. Sign-off ready for the field.

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RFI GeneratorNEW

Numbered RFI form with question, response, and cost/schedule impact.

fact_check

Submittal LogNEW

Track shop drawings and material submittals across the project.

Safety & Compliance

OSHA-aligned forms and calculators for jobsite safety programs, from toolbox talks to fall clearance.

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Toolbox Talk GeneratorNEW

12 ready-to-print talks (fall, silica, confined space, more) with sign-in sheet.

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JHA BuilderNEW

Job hazard analysis: task → hazards → controls with severity × probability scoring.

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Safety InspectionNEW

8-category pass/fail walk with notes per item and action items.

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Incident ReportNEW

OSHA-aligned documentation for injuries, near-misses, and property damage.

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OSHA 300 LogNEW

Recordable injury log with classification, body part, and CSV export.

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Confined Space PermitNEW

OSHA Subpart AA entry permit with atmospheric monitoring and rescue procedure.

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Fall Protection ClearanceNEW

Required clearance below anchor — lanyard, free fall, deceleration, safety factor.

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Scaffold LoadNEW

Allowable load by duty rating (light/medium/heavy) per OSHA 1926.451.

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Ladder Safety (4:1)NEW

Setback, angle, and working height per OSHA 1926.1053.

Cash Flow & Finance

See where the money is — WIP, job costs, draws, retainage, and the cash position week by week.

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WIP ScheduleNEW

Per-job % complete, earned revenue, over/under billing with multi-job rollup.

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Job Cost TrackerNEW

Budget vs actual by cost code with variance $/% and totals.

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Cash Flow ProjectorNEW

12-week running balance with inflows/outflows. Flag negative weeks.

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Draw ScheduleNEW

Phase-based draws, cumulative earned, and remaining to bill.

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Retainage TrackerNEW

Track held retainage across jobs. Earned-unreleased exposure.

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Break-Even CalculatorNEW

Monthly fixed overhead + margin → break-even revenue and job count.

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Equipment Cost RecoveryNEW

True hourly cost of owning + operating, and the rate to charge clients.

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AR AgingNEW

Open invoices bucketed by days past due. Total exposure by bucket.

Field Operations

Daily paperwork from the field: reports, time, payroll prep, and a quick project schedule.

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Daily Report

Field report with weather, crew, work performed, and safety tracking.

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Time Card

Weekly time card with regular/OT hours and CSV export for payroll.

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Overtime Calculator

Weekly and daily OT with state rules (CA, federal). Regular, 1.5x, and 2x rates.

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Payroll Prep

Multi-employee weekly payroll summary with burden, OT, and CSV export.

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Schedule Creator

Visual task timeline for any project. Add tasks, see the schedule, print or copy.

Scheduling & PM

Plan the work and track the schedule, from three-week lookaheads to CPM float.

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3-Week LookaheadNEW

Pull-planning board: tasks by week, assigned trades, predecessors.

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Crew Size CalculatorNEW

Crew needed for a deadline given labor hours and productivity factor.

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Productivity RatesNEW

Units per labor-hour from your past jobs. Build your own rate database.

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Concrete Cure TimeNEW

Strength gain by temp + time per ACI 308R curing curves.

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Weather Delay TrackerNEW

Log weather days for delay claims with trade impact and hours lost.

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Gantt Chart BuilderNEW

Visual Gantt with task bars, dependencies, today line. Save and print.

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Critical Path (CPM Lite)NEW

Forward/backward pass with float and critical-path identification.

Estimating

Build, compare, and sanity-check bids with your own cost data behind every number.

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Cost Estimator

Estimate costs by building type, state, and quality level.

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Bid Calculator

Calculate bid price with overhead, contingency, and profit margin.

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SF Cost DatabaseNEW

Your own SF cost reference by trade, region, quality. Build as you bid.

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Unit Price BookNEW

Save and reuse your own labor + material unit prices. CSV import/export.

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Assembly EstimatorNEW

6 starter assemblies (framed wall, slab, roof) editable per project.

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Bid Comparison SheetNEW

Line up multiple sub bids side by side. Auto-flag outliers (±2σ).

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Allowance TrackerNEW

Per-item client allowance vs actual spend. Bill overages as line items.

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Profit Margin OptimizerNEW

Back-solve bid price for a target net margin after overhead allocation.

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Bid / No-Bid ScorecardNEW

10 weighted factors → go/no-go threshold. Save scorecards per opportunity.

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Material EscalationNEW

Project material inflation over your timeline. Protect long-lead margins.

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Cost-Plus vs Fixed-PriceNEW

Side-by-side profit under/on/over-budget scenarios for both contract types.

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Plan Takeoff CounterNEW

Click to count fixtures, outlets, doors with running totals + invoice push.

Material Takeoffs

Quantity takeoffs for the materials you order most — with bags, loads, and cost where it matters.

foundation

Concrete

Cubic yards, bags, and ready-mix cost for slabs, footings, columns.

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Brick

Brick count, mortar bags, and cost for walls with openings.

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Mortar

Mortar bags, sand, and cement for brick or block walls.

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Cement Mix

Cement, sand, and aggregate quantities by mix ratio.

carpenter

Lumber

Board feet and lumber cost for any nominal size.

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Drywall

Sheets, tape, and compound for room takeoffs.

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Paint

Gallons for walls, ceiling, multiple coats, and primer.

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Sand

Tons and truck loads by sand type — mason, concrete, fill.

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Stone & Aggregate

Cubic yards and tons for #57, crushed, pea gravel, rip rap.

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Tonnage Converter

Volume to weight for 14 materials — tons, lbs, truck loads.

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Asphalt

Tons, square yards, truck loads, and cost for paving projects.

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Rebar

Bar count, linear feet, weight, lap splices by size and spacing.

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Tile

Tiles, boxes, grout, thinset for straight, diagonal, herringbone.

Site & Structure

Layout and structure math: areas, pitches, framing counts, and exterior assemblies.

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Square Footage

Area for rectangles, triangles, circles, L-shapes, trapezoids.

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Excavation

Cubic yards, tons, and truck loads for dirt, gravel, clay.

roofing

Roof Pitch

Rise/run to degrees, rafter length, and area multiplier.

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Roofing Materials

Shingles, underlayment, starter, ridge cap, drip edge, nails.

fence

Fence

Posts, rails, pickets, concrete — wood, vinyl, chain link.

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Siding

Squares, trim, fasteners for vinyl, fiber cement, wood, metal.

deck

Deck

Boards, joists, posts, beams, railing — PT, cedar, composite.

view_week

Board & Batten

Boards, battens, fasteners, and paint for vertical siding.

stairs

Stair Calculator

Risers, treads, total run, angle, and IRC code compliance check.

view_quilt

Wall Framing

Studs, plates, king/jack studs, cripples, board feet, and cost.

plumbing

Pipe Slope

Total fall, ending invert, slope %, grade with IPC presets.

Interior Finishes

Finish-material takeoffs for floors and walls, by room or whole job.

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Carpet

Square yards, padding, tack strip — multi-room support.

floor

Flooring

Boxes and underlayment for laminate, LVP, hardwood, tile.

wallpaper

Wallpaper

Rolls needed with pattern repeat, paste, and primer.

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Plywood

Sheets by size, thickness, and grade with usage guide.

Structural

Code-check and weight calculators for railings and steel.

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Baluster / Spindle

Baluster count and spacing for IRC code compliance.

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Steel Plate Weight

Weight and cost by dimensions, thickness, and grade.

Engineering Takeoffs (Estimates Only)

Rough engineering estimates for early scoping — always verified by a licensed engineer before construction.

thermostat

InsulationNEW

Batts/blown-in/SPF/rigid by area and R-value. IRC R402 reference.

water

Gutter & DownspoutNEW

LF of gutter, downspout count, and runoff capacity per IRC R903.4.1.

terrain

Grading & SlopeNEW

Cut/fill volumes, slope %, ADA ramp check (1:12 max).

water_pump

Septic DrainfieldNEW

Drainfield area by bedrooms + soil perc rate. Local code varies.

hvac

HVAC Load (Manual J Lite)NEW

Rough BTU and tonnage by floor area + climate zone. NOT a stamped Manual J.

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Electrical Service SizeNEW

NEC 220 service-size estimate. User enters demand factors per code.

cable

Conduit FillNEW

Fill % check against NEC Chapter 9. User enters conduit + wire areas.

horizontal_rule

Steel Beam EstimatorNEW

Simply-supported uniform load → required S and I. NOT engineered design.

rainy

Stormwater RunoffNEW

Rational method Q=CiA for small drainage areas. ASCE Manual 77.

Data & Reference

Live market data and everyday reference converters.

compare

Material Compare

Compare material prices side by side with trend sparklines.

leaderboard

State Scorecard

Compare states with employment, wages, and awards data.

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Unit Converter

Length, area, volume, weight, temperature, pressure.

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Board Foot

Board feet from nominal dimensions with MBF pricing.

Frequently Asked Questions

Are these construction calculators really free?

Yes — all 100 tools are free with no account, no trial, and no usage caps. The site is supported by other products, not by charging for calculators.

Is my data stored or sent anywhere?

No. Every tool runs entirely in your browser, and anything you save (invoices, estimates, logs) lives in your browser's localStorage on your device. Nothing is transmitted to a server.

Can I print or save my documents as PDFs?

Yes. Document tools (invoices, pay applications, lien waivers, proposals) are print-formatted — use your browser's Print dialog and choose "Save as PDF".

Do the calculators work offline?

Once a tool page has loaded, the math runs locally and keeps working without a connection. You need a connection to first open a page or to load live price data.

How accurate are the engineering estimate tools?

The Engineering Takeoffs section produces rough scoping estimates using standard references (NEC, IRC, ACI, ASCE). They are not stamped engineering and must be verified by a licensed engineer before construction.

Can tools share results with each other?

Yes — material calculators can push line items into the Invoice and Estimate generators, so a takeoff becomes a billable line without retyping.

All tools run in your browser. No data sent to any server. Documents stored in localStorage.