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Free Calculators And Templates For Contractors

Eight tools we use to answer the questions that come up every week in a trade shop: what should we bill an hour, did that job make money, how much air does this room need, how big is the service. No sign-up, no email wall — open one and start typing.

Business

Estimate TemplateBuild a clean, line-item estimate with markup and tax, then download it as a CSV or print it.Labor Rate CalculatorFind the billable hourly rate that covers wages, burden, overhead, and the profit you want to keep.Job Profit CalculatorCheck gross margin, net profit, and effective hourly return on any single job before or after you run it.Service Call Pricing CalculatorPrice a diagnostic or service call so it covers drive time, loaded labor, parts, and your target margin.

HVAC

HVAC CFM CalculatorCalculate required airflow by room volume and air changes per hour, or by system tonnage.HVAC Load CalculatorGet a fast square-foot BTU and tonnage estimate before you run a full Manual J.

Plumbing

Pipe Volume CalculatorFind the water volume, weight, and fill or flush time for any run of pipe.

Electrical

Electrical Load CalculatorEstimate dwelling service load in VA and amps using the standard demand-factor method.