No Hidden Fees. No Complicated Add‑Ons.
Choose the Right Plan for Your Business
Simple, transparent pricing built for contractors of all sizes.
No hidden fees, no long-term contracts — just pay for what you need.
Water Heater Sizing Calculator for Contractors
Estimate the ideal tank size based on bathrooms, occupants, and usage type.
Duct Sizing Calculator for HVAC Professionals
Calculate round and rectangular duct dimensions based on CFM, velocity, and friction rate.
Cooling Load Calculator for HVAC Contractors
Estimate cooling requirements based on square footage, insulation, and climate zone.
Electrical Load & Breaker Sizing Calculator
Determine total electrical load and recommended breaker size for residential or commercial setups.
Plumbing Pipe Sizing Calculator – Pressure Drop Tool
Open Plumbing Pipe Calculator
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Frequently Asked Questions?
Everything you need to know before getting started — simple answers, no jargon, no surprises.
These tools help contractors quickly estimate sizes, loads, and specs for HVAC, plumbing, and electrical jobs. No guesswork — just fast, reliable results.
Nope. All TackonFSM calculators are 100% free to use. No login, no subscription, no hidden fees?
Yes! Every calculator is mobile-friendly and optimized for quick use on job sites or in the field.
Each tool is listed on our Calculators page with direct links. Just tap the one you need and start calculating.
They’re designed for HVAC techs, plumbers, electricians, and field service pros — built by contractors, for contractors.
Absolutely. We’re always building new tools based on contractor feedback. Bookmark the page and check back often.
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Start your free 14-day trial today. No credit card, no setup fees — just powerful tools built for contractors.