Electronics calculator
What TV Size Fits My Wall?
Calculate maximum tv diagonal for wall using usable wall width, usable wall height, and side margin each side.
Enter your measurements
Use this maximum dimension when you need to answer “what tv size fits my wall?” Enter usable wall width, usable wall height, and side margin each side and the tool returns maximum tv diagonal for wall using the rule defined for this exact use case.
- Usable wall width — Required
- Usable wall height — Required
- Side margin each side — Required
- Top/bottom margin — Required
Maximum TV diagonal for wall
Enter the measurements above to calculate maximum tv diagonal for wall.
How the calculation works
V12 calculation: maxScreenWidth=max(0,wallWidth-2×sideMargin); maxScreenHeight=max(0,wallHeight-2×topBottomMargin); widthLimitedByHeight=maxScreenHeight×16/9; limitingWidth=min(maxScreenWidth,widthLimitedByHeight); limitingHeight=limitingWidth×9/16; maxDiagonal=sqrt(limitingWidth^2+limitingHeight^2). This is the implementation specification for this calculator.
Worked example
Example: Usable wall width = 300 cm; Usable wall height = 240 cm; Side margin each side = 30 cm; Top/bottom margin = 5 cm. Result: Max Diagonal = 275.36 cm.
Before you decide
The result is only as accurate as the measurements entered. This page calculates the stated geometry or quantity only; product-specific construction or installation details can still affect the final choice. For what tv size fits my wall, the limiting result on this page is maximum tv diagonal for wall.
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 TV Size calculator tell me?
It returns maximum tv diagonal for wall from the measurements entered on this page. The calculation is specific to tv size, so the result should be compared with the exact product or specification you are considering.
Which measurements should I take for tv size?
Measure usable wall width, usable wall height, side margin each side, top/bottom margin. Use clear, usable dimensions rather than nominal room or product labels.
Should I round the maximum tv diagonal for wall?
Keep the calculated value for comparison, then choose a real product that meets or stays within the returned maximum tv diagonal for wall while allowing for the clearances, tolerances or ratings shown by its manufacturer.