BTU Calculator

Estimate room cooling load in BTU from room dimensions and a simple sun-exposure adjustment.

Preparing BTU Calculator

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Input

Enter the room dimensions and sun exposure level to get a quick BTU estimate for cooling. This tool shows the result instantly without step-by-step output.

Input summary

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How to use BTU Calculator

Add the room size details, and the calculator will estimate a rough cooling-capacity target in BTU for that space.

What this calculator is for

This calculator is for quick room-cooling estimates when someone needs a starting point for a window unit or small air-conditioning decision. It is intentionally simpler than a full HVAC load calculation.

Tips

Insulation quality, occupant load, appliances, and local climate can change real cooling needs beyond a room-size estimate.
Use this as a screening tool and not as a substitute for a full Manual J or professional load calculation when system sizing matters.