Home / For / Contractors
For Contractors

Material takeoffs and bid math without a spreadsheet.

Concrete volume, rebar counts, framing lumber, paint coverage, labor burden — the calculations behind every estimate are small but easy to get wrong under time pressure. These are live tools an estimating agent (or a script) can call directly.

12 tools for contractors

trades
Concrete Calculator
Cubic yards, 60/80-lb bag counts and ready-mix cost for slabs, columns or tubes.
trades
Wall Framing Calculator
Stud, plate and header counts plus board-feet and cost for a framed wall.
trades
Floor Joist Span Calculator
Joist size/spacing feasibility and count for a floor span under a given live load.
trades
Rebar Calculator
Total rebar length, bar count and cost for a grid from slab dimensions and spacing.
trades
Board Feet Calculator
Board-feet per piece and total, weight and lumber cost from dimensions and quantity.
trades
Insulation Calculator
Material quantity and cost to hit a target R-value for a given assembly and climate zone.
trades
Paint Calculator
Gallons of paint and number of coats for a room from wall dimensions, openings and coverage.
trades
Paver Calculator
Paver count, base material and cost for a patio/walkway, including cutouts and waste.
trades
Asphalt Calculator
Tons of asphalt, loose cubic yards, truckloads and sub-base from driveway/lot dimensions.
trades
Contractor Bid Estimator
Build a client job bid from cost components: labor hours x rate + materials + equipment + subs, then overhead,…
trades
Construction Markup Calculator
Bid price, markup and true margin from direct costs, overhead and target margin.
trades
Labor Burden Calculator
Fully-burdened hourly cost of an employee including taxes, insurance, PTO and billing margin.

Install

One command wires up every tool below for Claude Code:

claude mcp add --transport http wingman https://wingmanprotocol.com/mcp

Claude Desktop, Cursor and Continue configs are on /install. A free key (500 calls/month, no card) is on /pricing; beyond that it is x402 pay-per-call in USDC on Base.