Mini Split Tools & Calculators
Free interactive tools to size, price, and plan your DIY ductless mini split project — no email required.
Mini Split Sizing Calculator
Get a Manual-J-style BTU recommendation for any room in about 30 seconds, adjusted for ceilings, sun exposure, and climate.
Open tool →Mini Split BTU Calculator
Find the right BTU size for a room or whole house — learn what BTU you need and why getting the number right keeps a mini split efficient.
Open tool →AC Rebate Calculator
Enter your zip code to see HOMES, HEAR, and state programs where you live, your estimated rebate, and a link to your state’s application page.
Open tool →HVAC Replacement Cost Calculator
Estimate what it costs to replace an AC, furnace, or heat pump — equipment plus installation — before you shop.
Open tool →Looking for how-to articles instead? Browse all mini split guides.