Free Business Calculators
Professional calculators for contractors, HVAC technicians, and tradespeople. Get accurate results instantly, no signup required.
HVAC CFM Calculator
Calculate the exact airflow (CFM) needed for any room based on dimensions and air changes per hour. Perfect for HVAC sizing and ventilation design.
Roof Pitch Calculator
Convert roof pitch between degrees, radians, percentage, and x:12 ratio. Calculate rafter length and roof area multiplier from rise and run measurements.
Decking Calculator
Calculate how many deck boards, linear feet, and screws you need for your project. Supports all board sizes and installation patterns.
Profit Margin Calculator
Calculate your true profit margin instantly. Enter revenue and costs to see gross profit, markup percentage, and cost breakdown for any job.
Labor Cost Calculator
Calculate your true hourly labor costs including wages, burden rate, overhead, and profit margin. Know exactly what to charge clients per hour.
House Cleaning Cost Calculator
Calculate competitive pricing for residential cleaning jobs. Price by room count or square footage with add-on services and cleaning type adjustments.
Solar Calculator
Calculate how many solar panels you need, annual power generation, system costs, and savings. Solar power calculator with accurate energy production estimates.
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