PhotoMathHow it works
Enter wall width and height, actual outer-frame size, rows, columns and the gap between adjacent frames. The grid is centered on the wall. Width equals columns times frame width plus the internal horizontal gaps; height uses rows and vertical gaps. There is no gap outside the grid. Side and top/bottom margins can become negative when the layout exceeds the wall. Rotate every frame to compare portrait and landscape arrangements. This release supports uniform rectangular grids, not individually dragged mixed-size frames.
Example
For a 200 × 150 cm wall, six 30 × 40 cm frames in three columns and two rows with 5 cm gaps form a 100 × 85 cm grid. Centering leaves 50 cm at each side and 32.5 cm above and below. Download the SVG as a planning diagram. It is not a full-size mounting template and does not locate hooks, account for furniture or validate wall loading. Measure actual frames and hardware before installing.
Assumptions and limitations
Yes. Settings are stored in millimetres and converted for display. Changing units preserves the same physical sizes.
Frequently asked questions
Are photos uploaded or saved?
No. Image decoding, preview and export happen in your browser. Only numeric settings are saved locally. Reloading removes loaded photos; use the demo to try the image workflow.
Does a 300 PPI result guarantee a sharp print?
No. Focus, source quality, viewing distance, paper and the printing process also matter. Choose a target appropriate to your intended output.
Are centimetres and inches interchangeable here?
Yes. Settings are stored in millimetres and converted for display. Changing units preserves the same physical sizes.