A functional TV tabletop needs three things: a screen positioned safely at table height, a computer or other source connected by HDMI, and software that can display your battle map at the correct physical scale. The critical setup step is calibration. One grid square on the screen needs to measure about one physical inch if you are placing standard miniatures directly on top. Get that right, protect the display, and the rest is mostly workflow.
You have seen the setups online: a flatscreen lying face-up inside a gaming table, a detailed dungeon glowing underneath the miniatures, fog of war revealing rooms as the party moves. It looks like something built for a professional actual play. In practice, the core setup is much simpler. A display, an HDMI cable, a computer, and a map viewer get you most of the way there.
The hard part is making the display behave like a real tabletop instead of a giant monitor. Screen size, protection, glare, map scale, and repeatable prep matter more than exotic hardware. This guide covers those decisions from the first screen purchase to the final miniature test.
What size TV do you actually need?
For most four- to five-player tables, 43 to 55 inches is the useful range. That gives you a large tactical surface without swallowing the rest of the table. Bigger can work in a dedicated gaming room, but the screen starts competing with dice trays, sheets, drinks, and the simple need for people to reach across the table.
The physical dimensions matter more than the diagonal number. A standard 16:9 43-inch screen is roughly 37.5 inches wide by 21 inches tall. A 55-inch screen is about 48 inches wide by 27 inches tall. If you calibrate one grid square to one physical inch, that is roughly a 37 by 21 square play area on a 43-inch display and about 48 by 27 squares on a 55-inch display, before accounting for bezels and any software margins.
| TV Size | Approx. 16:9 Screen Area | Approx. 1-Inch Grid Area | Best Fit |
|---|---|---|---|
| 40" | 34.9 × 19.6 in. | About 34 × 19 squares | Compact tables |
| 43" | 37.5 × 21.1 in. | About 37 × 21 squares | Most standard tables |
| 55" | 47.9 × 27.0 in. | About 47 × 26 squares | Large encounter maps |
| 65" | 56.7 × 31.9 in. | About 56 × 31 squares | Dedicated gaming rooms |
Resolution is secondary to physical size for this use. A 1080p screen can work perfectly well because miniatures are covering part of the display and the players are viewing it from table distance. A 4K screen gives sharper terrain and text, but it does not increase the physical number of one-inch squares the panel can show.
If you are placing standard miniatures directly on the display, calibrate one map square to about one physical inch. That measurement matters more than the image's DPI, the TV's resolution, or the map software you choose.
How should you mount or position the TV?
There are three practical layouts. Whichever one you use, support the panel evenly, preserve its ventilation, and check the manufacturer's guidance before operating a consumer TV in an orientation it was not designed for. A tabletop build should never block vents or put pressure on the face of the panel.
The fastest physical-map setup. Build or use a frame that supports the TV around the chassis instead of pressing on the screen. Add a clear protective surface above it if miniatures will sit directly over the display.
The cleanest permanent build. The display sits below a framed play surface, cables route underneath, and the screen is protected from direct contact. It costs more and makes the table less flexible for other uses.
The simplest no-build option. The TV remains upright and acts as a shared map reference while miniatures stay on a separate grid or the group runs without physical tokens.
If miniatures will touch the play surface, a removable acrylic or tempered-glass cover is the practical upgrade. Acrylic is lighter and inexpensive. Tempered glass is more scratch resistant. Leave enough air space around the TV itself that the protective layer does not trap heat against vents.
What hardware do you need to connect the TV?
The basic signal chain is short: display source, HDMI cable, TV. Start with the simplest source you already own and upgrade only if the permanent setup earns it.
| Setup Option | Typical Extra Cost | Best For |
|---|---|---|
| Laptop + HDMI | Cable or adapter only | Fastest starting point |
| Used mini-PC | Often $150 to $250 | Permanent setups |
| Raspberry Pi 4 / 5 | Varies by kit | Lightweight hosting or simple browser display |
| Dedicated tabletop frame | Highly variable | Long-term gaming room build |
A laptop is still the default recommendation. Set the TV as an extended display, keep the DM tools on the laptop, and move the player-facing map window onto the TV. A mini-PC makes sense once you know you want the setup assembled permanently.
Foundry officially supports Raspberry Pi 4 and Pi 5 models as server hosts when the operating system meets its current requirements, but hosting the server and rendering a complex player view are different workloads. For lighting-heavy scenes, test performance before building the whole table around a Pi. A basic browser map or lightweight VTT display is a much easier job.
Use HDMI if the display is part of the table. A cable is boring, which is exactly what you want from the connection carrying the map everyone is staring at.
What software works best for a TV battle-map table?
Black Lantern Forge maps include documented grid dimensions with gridded and gridless versions, so you can load the same encounter into Foundry, Owlbear Rodeo, or a fullscreen viewer without rebuilding the map for a physical display.
Browse Map Packs →How do you calibrate the map so miniatures fit?
This is the step that turns a monitor into a tabletop. Load a gridded map on the TV and put a physical ruler directly over one grid square. Adjust the software zoom or canvas scale until that square measures approximately one inch across.
Use a map with a known square count so you can see exactly what the software is displaying.
Put a ruler on the physical display. If the square is not about one inch, your miniature footprint will not line up.
Write down the zoom, scale, or module calibration that produced the correct physical size so the next session starts from a known baseline.
Foundry's scene configuration separates image dimensions, grid size in pixels, and grid scale, which makes it easy to align maps with different source resolutions. It also has community modules designed specifically for one-inch physical grid calibration on tabletop displays. The important distinction is that a map's 140 px/square source resolution does not automatically equal one physical inch on your TV. Physical calibration depends on the TV's actual size, browser zoom, operating-system scaling, and the VTT canvas.
Measure once, record the setting, and make every future session inherit the same calibration instead of rediscovering it while players are arriving.
Why do TV-table setups get abandoned after a few sessions?
Usually because the setup never becomes a repeatable workflow. The hardware works, but every session starts with a different app, different folder, different scale, and different attempt to make the display behave. What looked convenient starts costing 20 minutes of prep every game night.
Player display separated from DM controls
Physical miniature footprint confirmed
Fog and scene settings ready before game time
A real base fits cleanly inside one square
Players can read dark areas from every seat
Frame and protective cover do not trap heat
Frequently Asked Questions
Will miniatures scratch a TV screen used as a tabletop?
They can, especially if bases are dragged instead of lifted. A removable acrylic or tempered-glass cover creates a sacrificial play surface over the display. Whatever cover you choose, make sure the build still leaves the TV's vents unobstructed.
What is the best free software for displaying battle maps on a TV?
Owlbear Rodeo is a strong free starting point if you want maps, tokens, and fog in a browser. If you only need a background image under physical miniatures, a fullscreen image viewer is even simpler and has almost no setup overhead.
How do I keep the DM view separate from the TV?
Use the TV as an extended display instead of mirroring your laptop. Keep the GM interface, notes, hidden tokens, and controls on your primary screen. Move only the player-facing browser window or map view onto the TV.
Does the TV need to be a smart TV?
No. If the display source is a laptop, mini-PC, or other computer connected by HDMI, the TV's smart features are mostly irrelevant. Screen size, panel condition, input availability, viewing angles, heat management, and glare matter more for this use case.
How do I reduce glare on a flat tabletop display?
Change the room lighting before changing the map. Direct overhead lights are the biggest problem because they reflect back toward seated players. Side lighting, lower ambient light, and a matte protective surface can all improve readability without making the map itself brighter.
Can I use a projector instead of a TV?
Yes. An overhead short-throw projector can cover a larger physical area and keeps the tabletop itself free of a heavy panel. The tradeoffs are room-light sensitivity, shadows cast by miniatures and hands, and more demanding mounting and alignment. TVs are usually easier in normal living-room lighting.
What resolution map files should I use on a TV tabletop?
Use a source map with enough pixels per square to stay sharp at the zoom level you need. Foundry notes that common map grids include 70, 100, 140, and 200 pixels per square. A 140 px/square source is a strong high-resolution option, but it does not determine physical miniature scale by itself. You still need to calibrate one on-screen square to one physical inch.
High-resolution battle maps with documented grid dimensions, gridded and gridless versions, and layouts built to stay readable under real miniatures.
Shop Battle Map Packs →Sources
| Foundry VTT | Scenes and Grid Configuration |
| Foundry VTT | Minimum Requirements and Raspberry Pi Support |
| Foundry VTT | Foundry VTT License |
| Owlbear Rodeo | Getting Started |
| Owlbear Rodeo | Fog Tools |
