Free tools
Contractor tools that catch costly details.
Material takeoffs, pricing math, paperwork, and a second set of eyes on your bathroom scope. Start using every tool before any signup is requested.
Material calculators
Tile & Flooring Calculator
Room size → tiles, boxes, and waste.
Paint Calculator
Room size + coats → gallons of paint.
Concrete Calculator
Slabs & footings → cubic yards and bags.
Drywall Calculator
Room size → sheets, mud, tape, screws.
Decking Calculator
Deck size → boards, joists, fasteners.
Stair Calculator
Total rise → code-compliant steps.
Contractor business tools
Bathroom Remodel Bid Checker
Paste a scope → catch details worth checking.
Markup vs. Margin Calculator
Convert between markup and gross margin.
Contractor Hourly Rate Calculator
What to charge per hour to actually profit.
Payment & Draw Schedule Builder
Contract total → milestone payment plan.
Free Construction Estimate Generator
Build a printable line-item estimate.
Construction Change Order Generator
Added work and credits → a printable change order.
Contractor Labor Burden Calculator
Wages, taxes, and benefits → real hourly cost.
Bathroom Remodel Scope Builder
Pick the work → a printable scope checklist.
Construction Job Profit Calculator
Compare your bid with the costs that came in.
Remodeling Allowance Tracker
Track selections, overages, and remaining decisions.
Takeoff & document worksheets
Construction Punch List Generator
Turn walkthrough notes into an assignable closeout list with location, trade, owner, due date, status, and verification.
Open worksheet
Framing Calculator
Plan wall studs, plates, headers, blocking, and a documented waste allowance from measured wall runs and openings.
Open worksheet
Roofing Calculator
Convert roof geometry into squares, bundles, underlayment, ridge, starter, flashing, and waste for a roofing takeoff.
Open worksheet
Construction Contract Template Checklist
Organize parties, scope, price, schedule, payments, changes, insurance, warranties, disputes, and signatures before legal review.
Open worksheet
Contractor Invoice Generator Checklist
Build a clear invoice from contract value, approved changes, prior billings, current work, retainage, taxes, and payment terms.
Open worksheet
Cost per Square Foot Calculator
Calculate a transparent cost-per-square-foot benchmark and label the cost and area basis so comparisons remain valid.
Open worksheet
Flooring Calculator
Estimate flooring area, waste, package count, transitions, underlayment, and accessory quantities from room measurements.
Open worksheet
Construction Cost by ZIP Code: Build a Local Adjustment
Use local labor, material, logistics, permit, and market evidence to adjust a base estimate instead of trusting a single ZIP-code multiplier.
Open worksheet
Siding Calculator
Estimate net wall area, siding squares or panels, trim, corners, openings, accessories, and waste for an exterior takeoff.
Open worksheet
Insulation Calculator
Plan insulation area or volume, target R-value, material coverage, package count, waste, and assembly-specific accessories.
Open worksheet
Sod Calculator
Estimate lawn area, rolls or pallets, waste, soil preparation, delivery, installation, and watering requirements.
Open worksheet
Calculations and scope checks happen in your browser. The Bid Checker stores only the email you submit, never your scope.
Need a worked example? Browse contractor guides and free templates →
The fastest calculator of all: describe the job, get the estimate.
GreenlitBid turns a one-sentence description into a complete line-item estimate and a signed, paid proposal. 14-day free trial, no credit card.