General contracting tools
General Contracting Calculators
Square footage estimators, dumpster sizing, and job cost tools for general contractors. Free to use on any project.
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.
Open calculator →
Square Footage Calculator
Calculate total square footage across multiple rooms or spaces.
Open calculator →
Dumpster Size Estimator
Get a recommended dumpster size for your project type and scope.
Open calculator →
Ready to simplify your contracting business?
Bit & Grain connects your field tools to estimates, invoicing, and job management. Free to start.