Appliances & Utilities calculator
What Window AC Size Do I Need?
Use window clear width, window clear height, ac width to find window ac fit and capacity.
Enter your measurements
What Window AC Size Do I Need uses window clear width, window clear height, ac width and the other configured measurements to return window ac fit and capacity with a formula written specifically for this tool.
- Window clear width — Required
- Window clear height — Required
- AC width — Required
- AC height — Required
- Required cooling capacity — Required
- Unit rated capacity — Required
Window AC fit and capacity
Enter the measurements above to calculate window ac fit and capacity.
How the calculation works
V9 calculation: openingPass=unitWidth≤windowWidth AND unitHeight≤windowHeight; capacityPass=unitRatedCapacity≥requiredCoolingCapacity; overallPass=openingPass AND capacityPass. The result is reported as window ac fit and capacity.
Worked example
Example: Window clear width = 76.26 cm; Window clear height = 99.95 cm; AC width = 47.1 cm; AC height = 21.11 cm; Required cooling capacity = 462.07 W; Unit rated capacity = 3433.71 W. Result: Fits; Capacity Pass = Pass; Opening Pass = Pass.
Before you decide
Use measured dimensions rather than nominal labels. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what window ac size do i need, the limiting result on this page is window ac fit and capacity.
Direct measurement/geometry calculation. No external reference is required for the arithmetic itself; the result is derived only from the user-entered measurements and the formula stored in calculationLogicJson.
Frequently asked questions
What does the Window AC Size calculator tell me?
It returns window ac fit and capacity from the measurements entered on this page. The calculation is specific to window ac size, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for window ac size?
Measure window clear width, window clear height, ac width, ac height, required cooling capacity, unit rated capacity. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the window ac fit and capacity?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned window ac fit and capacity while allowing for the clearances, tolerances or ratings shown by its manufacturer.