Shower Pan Envelope Layout Tool

The Envelope Layout Tool is a specialized visualizer designed to help you plan the perfect four-way slope for your shower floor. By entering your shower pan dimensions and tile size, you can instantly see how the diagonal “envelope” cuts will align with your drain and walls. Our tool helps you achieve symmetrical grout lines, center your drain perfectly, and eliminate awkward tile slivers before the first cut is made.

Whether you are working with large-format tile or classic subway styles, this tool generates a precise floor map that ensures water flows correctly while maintaining a high-end, professional look. Generate and download a one-page PDF of your envelope layout to share with your installer or use as a blueprint on the job site. No signup, no email, and no phone number required — completely free.

Shower Pan Settings

Whole inches + fraction, left to right.
Whole inches + fraction, back wall to curb.

Tile Settings

Whole inches + fraction. Example: 11 and 3/4.
Whole inches + fraction. Example: 23 and 5/8.
Choose standard grout spacing.

Tile Layout Control

Controls where the tile grid starts and how cuts land on left, right, back wall, and curb.
Positive moves tile grid right. Negative moves it left.
Positive moves tile grid toward curb. Negative moves it to back wall.

Drain Settings

Left to right size in inches
Back to curb size in inches
Inches
Inches
Inches per foot. Standard shower pan slope is commonly 1/4 inch per foot.
Tile grid
Envelope planes
Drain
Envelope cut lines
Layout start control

Layout Notes

    Open Shower Tile Layout Tool

    Stop Guessing, Start Visualizing

    Planning a subway or offset pattern? Input your wall dimensions to see exactly how your tile fits across all three walls. Get a precise blueprint to share with your installer for a flawless finish.
    Open Shower Tile Layout Tool

    How to Use the Envelope Layout Tool

      1. Enter Pan Dimensions: Input the total width and depth of your shower floor.

      2. Set Tile Size: Choose your tile dimensions and the direction you want them to run.

      3. Position Your Drain: Enter the exact measurements for your drain location.

      4. Choose a Start Point: Decide how the grid should align (e.g., centered on the drain or a specific corner).

      5. Click Calculate: The tool will instantly render your layout, showing the “envelope” slope lines and precisely how the tiles will be cut.

      6. Review Tile Quantities: Look at the results section to see exactly how many tiles are required for the project, including the specific pieces needed for the perimeter.

      7. Download PDF: Save your custom layout and tile counts as a one-page PDF to take to the tile shop or share with your installer.

    Open Shower Tile Calculator

    Shower Tile Calculator

    Use our free shower tile calculator to calculate wall and floor tile square footage, including waste. Perfect after planning your layout.
    Open Shower Tile Calculator

    Yes. You can select your preferred grout joint (1/16″, 1/8″, or 3/16″) to get a realistic preview of the layout and ensure your measurements remain accurate during installation.

    Absolutely. You can input any dimensions, from small mosaics to large-format 12×24 or 24×48 tiles. The tool is especially helpful for large tiles where “designing the right way” is critical to avoid awkward slivers at the drain.

    Yes. After clicking “Calculate,” the visualizer renders the “envelope” slope lines. These lines show you exactly where the tile needs to be cut diagonally to create the four-way slope toward your drain.

    Yes. You can use the “Layout Start Point” setting to center the grid specifically on your drain. This ensures the most symmetrical and professional look for your shower floor.

    Absolutely. The tool centers your layout so you can avoid small slivers and see where cuts will land on each wall.

    Yes. You can generate and download a one-page PDF of your specific layout. This includes your measurements, tile counts, and the visual map, making it easy to share with your installer or keep on-site.