HVAC Load Calculator - Find Your Perfect HVAC Size

Choosing the right size HVAC system is crucial for comfort and efficiency. Our calculator helps you determine the ideal tonnage based on your home's characteristics.

Get a quick recommendation by entering your home's square footage, insulation quality, window count, and other key factors. Our calculator uses industry-standard calculations to provide an accurate tonnage estimate.

Remember that this is a preliminary estimate. For the most accurate sizing, we recommend consulting with a professional HVAC contractor who can perform a detailed Manual J calculation.

HVAC Load Calculator - Calculate Your Home's Cooling Requirements

Use our interactive calculator to determine the recommended HVAC system size for your home based on key characteristics.

Square FootageInsulation QualityNumber of WindowsCeiling Height (feet)Sun ExposureClimate Zone

Recommended System Size

0 Tons

*This is a preliminary estimate. For accurate sizing, consult with an HVAC professional for a Manual J calculation.

Silver Spark Studio is an AI-first agency specializing in smart websites, CRM integration, and workflow automation. We build seamless, high-conversion systems that capture leads, streamline operations, and drive real growth—without complexity or compromise.

Explore More Tools Work With Us

From the blog

Learn more about HVAC sizing and efficiency.

Mentor Showcase: ColorPal

May 5, 2025

ColorPal Color Studio is an AI-powered color palette generator designed to revolutionize how brands and designers create emotionally resonant and visually cohesive color schemes.

Building a Better Future: The Silver Spark Internship Initiative

April 19, 2025

How our FOSS internship program is creating real-world impact by supporting emerging talent, building public-good software, and fostering a culture of remote collaboration.

Tell us about your project

Say Hey

Our offices

Richmond
8401 Mayland Dr #8198
Richmond, VA 23294
Raleigh
1000 Centregreen Way
Cary, NC 27513