General contracting tools
General Contracting Calculators
Square footage estimators, dumpster sizing, and job cost tools for general contractors. Free to use on any project.
Starting a contracting business? The General Contracting Business Starter Kit has the project estimator, estimate, change order and startup checklist.
General contracting calculators
Built for every project type
From quick square footage estimates across multiple rooms to dumpster sizing and job cost breakdowns.
Job Cost Estimator
Estimate total job cost from materials, labor hours, rate, and markup percentage.
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Square Footage Calculator
Calculate total square footage across multiple rooms or spaces.
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Dumpster Size Estimator
Get a recommended dumpster size for your project type and scope.
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Ready to simplify your contracting business?
Bit & Grain connects your field tools to estimates, invoicing, and job management. Free for 30 days, no credit card.