# HVAC Size Calc - Free HVAC Load Calculators

> Free HVAC Size Calculators for Homeowners and Contractors
> Written by Derek Holloway. Free calculators, no signup required.

## Pages

- [Blog](https://hvacsizecalc.com/blog/)
- [Calculators](https://hvacsizecalc.com/calculators/)
- [About HVAC Size Calc](https://hvacsizecalc.com/about/)
- [Contact](https://hvacsizecalc.com/contact/)
- [BTU Calculator](https://hvacsizecalc.com/btu-calculator/)
- [AC Unit Size Calculator](https://hvacsizecalc.com/ac-unit-size-calculator/)
- [Furnace Size Calculator](https://hvacsizecalc.com/furnace-size-calculator/)
- [Duct Size Calculator](https://hvacsizecalc.com/duct-size-calculator/)
- [Mini Split Size Calculator](https://hvacsizecalc.com/mini-split-size-calculator/)
- [Heat Pump Size Calculator](https://hvacsizecalc.com/heat-pump-size-calculator/)
- [Privacy Policy](https://hvacsizecalc.com/privacy-policy-2/)
- [HVAC Energy Cost Calculator](https://hvacsizecalc.com/hvac-energy-cost-calculator/)
- [CFM Calculator](https://hvacsizecalc.com/cfm-calculator/)
- [Refrigerant Charge Calculator](https://hvacsizecalc.com/refrigerant-charge-calculator/)
- [Ventilation Calculator](https://hvacsizecalc.com/ventilation-calculator/)
- [HVAC Efficiency Calculator](https://hvacsizecalc.com/hvac-efficiency-calculator/)
- [Smart Thermostat Savings Calculator](https://hvacsizecalc.com/smart-thermostat-savings-calculator/)
- [HVAC System Lifespan Calculator](https://hvacsizecalc.com/hvac-lifespan-calculator/)
- [Indoor Air Quality Calculator](https://hvacsizecalc.com/indoor-air-quality-calculator/)
- [HVAC Energy Savings Calculator](https://hvacsizecalc.com/hvac-energy-savings-calculator/)
- [Air Conditioner Size Calculator](https://hvacsizecalc.com/air-conditioner-size-calculator/)
- [SEER Savings Calculator](https://hvacsizecalc.com/seer-savings-calculator/)
- [HVAC Cost Calculator](https://hvacsizecalc.com/hvac-cost-calculator/)
- [Refrigerant Charge Calculator](https://hvacsizecalc.com/refrigerant-calculator/)
- [HVAC Load Calculator](https://hvacsizecalc.com/hvac-load-calculator/)

## Blog Posts

- [How to Choose Between Gas vs Electric Heating](https://hvacsizecalc.com/how-to-choose-between-gas-vs-electric-heating/)
- [HVAC Federal Tax Credits: What You Can Claim in 2025](https://hvacsizecalc.com/hvac-federal-tax-credits-what-you-can-claim-in-2025/)
- [What Is a Mini Split System and Is It Right for You?](https://hvacsizecalc.com/what-is-a-mini-split-system-and-is-it-right-for-you/)
- [The Complete Guide to HVAC Sizing: Calculate the Right System for Your Home](https://hvacsizecalc.com/the-complete-guide-to-hvac-sizing-calculate-the-right-system/)
- [The Ultimate BTU Calculator Guide: Size Your HVAC System Like a Pro](https://hvacsizecalc.com/the-ultimate-btu-calculator-guide-size-your-hvac-system-like/)
- [How Much Does a New HVAC System Cost in 2025](https://hvacsizecalc.com/how-much-does-a-new-hvac-system-cost-in-2025/)
- [How to Clean Your AC Condenser Coils Step by Step](https://hvacsizecalc.com/how-to-clean-your-ac-condenser-coils-step-by-step/)
- [Programmable Thermostat vs Smart Thermostat: Which Saves More?](https://hvacsizecalc.com/programmable-thermostat-vs-smart-thermostat-which-saves-more/)
- [HVAC Costs by State 2026 — Installation Price Comparison for All 50 States](https://hvacsizecalc.com/hvac-costs-by-state/)
- [How to Improve Home Energy Efficiency with HVAC Upgrades](https://hvacsizecalc.com/how-to-improve-home-energy-efficiency-with-hvac-upgrades/)
- [HVAC Repair vs Replacement: True Cost Breakdown](https://hvacsizecalc.com/hvac-repair-vs-replacement-true-cost-breakdown/)
- [How to Read Your HVAC Energy Use on Smart Meters](https://hvacsizecalc.com/how-to-read-your-hvac-energy-use-on-smart-meters/)
- [Mini-Split Installation Cost: What to Expect in 2026](https://hvacsizecalc.com/mini-split-installation-cost-what-to-expect-in-2026/)
- [AC Unit Size Calculator: Complete Guide to Choosing the Right Cooling Capacity](https://hvacsizecalc.com/ac-unit-size-calculator-complete-guide-to-choosing-the-right/)
- [The Complete Guide to HVAC Sizing: How to Calculate the Right System for Your Home](https://hvacsizecalc.com/the-complete-guide-to-hvac-sizing-how-to-calculate-the-right/)

## Key Facts

- All calculators are free — no account or signup required
- Content written by Derek Holloway
- Updated regularly with current rates, fees, and data
- No personal data collected or stored
- Calculators run client-side in your browser