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Cinema Seating Rows & Sightlines Calculator
How many seating rows fit, with sightline tips
Updated 12 July 2026 · Live
What this tool does
Works out how many seating rows fit in a room from its depth and the row spacing, and flags the riser step needed for clear sightlines.
Enter the room depth, the row spacing and the first-row setback; the calculator returns the number of rows that fit.
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Formula Used
Works out how many seating rows fit in a room from its depth and the row spacing, and flags the riser step needed for clear sightlines. It runs entirely in your browser and shows the working, so you can check every step against your own figures.
How the cinema seating rows & sightlines calculator works
The usable depth is the room depth minus the setback you leave in front of the first row. Dividing that by the row spacing and adding the first row gives the number of rows that fit. The tool also flags the riser step — raising each row 100–150 mm — that keeps heads in one row from blocking the screen for the row behind.
What you enter
Enter the room depth, the row spacing and the first-row setback; the calculator returns the number of rows that fit. Every field is editable, and the result recalculates the moment you change a value.
Reading the result
The row count sets the seating plan; the riser tip is what makes the back rows actually usable. A raised rear row on a platform is the single biggest sightline improvement in a home cinema.
Safe by design
This is pure geometry and acoustics — there is no safety threshold anyone acts on. It plans what you can see and hear, not any electrical or structural work.
Assumptions and limits
This counts rows on depth alone. True sightline design also depends on eye heights, screen height and the rake angle, which a full section drawing resolves. Leave a clear route to the exits and space for the screen and any acoustic treatment.
Using it with the rest of BuildMetricLab
This calculator is one step in planning the job. Pair it with the related tools in this category and across BuildMetricLab to go from a single figure to a full costed plan — a sizing figure feeds a cost estimate, a cost estimate feeds a project budget, and each result carries straight into the next tool. Every BuildMetricLab tool runs entirely in your browser — no sign-up, nothing sent to a server, and the formula is shown on the page so the maths can be audited.
Sources & methodology
Works out how many seating rows fit in a room from its depth and the row spacing, and flags the riser step needed for clear sightlines. Every result is calculated from the values you enter, all inputs are editable, and no time-sensitive prices or rates are embedded.
Frequently asked questions
What row spacing should I use?
Around 1.0–1.2 m front-to-front gives legroom for reclining seats. Tighter spacing fits more rows but less comfort.
How much should I raise each row?
A riser of 100–150 mm per row keeps the row behind seeing over the heads in front. A raised rear platform is the biggest single improvement.
How far should the front row be?
Far enough that the front row is not craning at the screen — use the TV-size tool to match the screen to that first-row distance.
Does this design the full sightline?
No — it counts rows and flags the riser. A full sightline study uses eye heights, screen height and the rake angle in a section drawing.
Spotted something off?
Calculations or display — let us know.