Contractor tools
Free tools to run your business
Use Dabe tools to check HVAC planning, plumbing volume, roofing materials, pricing, ROI, templates, checklists, and service business numbers before the next estimate conversation.
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HVAC tools for early job planning
Check CFM, ACH, duct sizing, load, refrigeration BTU, and SEER savings before moving into detailed equipment selection.
Built for estimate conversations
Each tool is designed to make inputs, assumptions, and next steps easier to explain to a manager, dispatcher, technician, or homeowner.
ACH Calculator
Estimate air changes per hour from room volume and airflow.
Service Business Valuation Calculator
Model EBITDA, asset-floor valuation, and platform uplift for a service business.
Flow Rate Calculator
Calculate flow from diameter and velocity, or from volume over time.
Parts Markup Calculator
Convert part cost and markup percentage into selling price.
HVAC CFM Calculator
Find required CFM from room size and desired air changes per hour.
HVAC Duct Calculator
Estimate duct size, effective length, velocity, and friction loss.
HVAC Labor Rate Calculator
Calculate billable labor rate for HVAC service teams.
HVAC Load Calculator
Estimate cooling BTU load and recommended equipment sizing.
HVAC Maintenance Checklist
Use a printable seasonal HVAC maintenance checklist for technician notes, homeowner explanations, and service follow-up.
HVAC Estimate Template
Use a repair and replacement estimate template with line items, assumptions, disclaimers, and customer-ready next steps.
HVAC Profit Margin Calculator
Calculate margin from billable revenue, costs, and overhead.
HVAC Business Valuation Calculator
Run the service-business valuation model with HVAC positioning.
Labor Rate Calculator
Find overhead coverage, break-even, and billable labor rates.
Pipe Volume Calculator
Calculate liquid volume and water weight from pipe diameter and length.
Plumbing Labor Rate Calculator
Calculate billable labor rate for plumbing teams.
ROI Calculator
Estimate monthly revenue increase, annual increase, and ROI percentage.
Refrigeration BTU Calculator
Estimate cooling capacity from volume and temperature difference.
Reputation Listing Scan
Collect listing information for a report request workflow.
Roofing Calculators
Calculate roof area, roofing materials, shingles, and bundles.
SEER Energy Savings Calculator
Estimate cooling and heating energy savings from efficiency upgrades.
Service Business Grader
Estimate revenue lift from scheduling, dispatch, tracking, and estimate workflows.