The best app for measuring wall height depends on how many walls you need and what you'll use the measurements for. For one quick check, the Measure app built into your iPhone will do. To capture every wall height in a room and save it for later, scan the room with Polycam and measure from the model. A laser distance meter still has a place too, and this guide covers where.
Key Takeaways
- A Polycam scan on a LiDAR iPhone or iPad captures every wall height in a room, and you can measure from it long after you’ve left.
- Match the tool to the job. Paint and wallpaper estimates tolerate small errors.
- Phone LiDAR is reliable to about 5 meters (16 feet) per surface. Taller walls need a laser measure.
Which App Is Best for Wall Height Measurement?
| Tool | Best for | Walls per session | Cost |
|---|---|---|---|
| Apple Measure | Checking whether one bookcase or headboard clears the ceiling | One at a time, with no record of the room | Free, built into iPhone |
| Polycam | Ordering paint, wallpaper, or paneling for a whole room | The whole room from one scan | Scanning and the Ruler on the Free plan. Auto Measure from Basic, and the Spatial Report on Business |
| Laser distance meter | Walls over 16 feet and critical cuts | One at a time | Hardware purchase |
Apple’s Measure app acts like a tape measure in augmented reality. On iPhone 12 Pro and newer, the LiDAR Scanner adds guide lines for heights and straight edges. The app is fast, but it only gives you one number at a time and doesn’t save your measurements. With a scan, you record the whole room, so you can always check any height you missed later.
How Accurate Does Your Wall Height Need to Be?
Paint and wallpaper projects are flexible. On a 12-foot wall, being off by half an inch only changes the area by about half a square foot, which is less than what you’ll trim anyway. The same goes for curtain rods, artwork, and shelving. A scan provides all the accuracy you need for these tasks.
Built-in projects are different. Floor-to-ceiling cabinets, paneling, and bookcases need to fit exactly between the floor and ceiling, so there’s little room for mistakes. Use the scan to plan your design and make sure it’s close, but always confirm the final measurement with a tape or laser before cutting anything.
How to Measure Wall Height From a Polycam Scan
- Start by scanning the room with Polycam. Use Space or Floorplan mode on a LiDAR iPhone or iPad. Move slowly and sweep the phone up and down as you walk, so the scan captures the floor, the full height of each wall, and the ceiling. If you have trouble seeing a corner or the ceiling line, turn on the flashlight in the capture screen.
- Place the Ruler with care. Open your scan, tap the Measure icon, and select a point where the wall meets the floor and another point directly above it on the ceiling. It helps to zoom in on each end before placing the points, since your measurement depends on their accuracy. You can drag either point to adjust it. The Ruler tool comes with every plan and is free.
- Let Auto Measure handle the walls. On Basic and above, Auto Measure generates measurements for the walls it detects, so you don’t have to place every point by hand.
- Pull heights and wall areas for the whole space. On Business and Enterprise, the Spatial Report on Polycam for Web lists the ceiling height for each room. It also gives wall area with and without openings, which is the figure you’d order paint or wallpaper from.
Try it on one room. Download Polycam for free.
Where Wall Height Measurements Go Wrong
Most mistakes happen because of the room, not the phone. Floors and ceilings are often not perfectly level, especially in older homes. If you only measure in the middle of a wall, you might miss a low corner. For built-in projects, measure at both ends and in the center, and use the shortest measurement for your plans.
Trim can also cause problems. Before you measure, decide if you need the height to the ceiling or to the bottom of the crown molding, and place your points accordingly. Sloped and vaulted ceilings don’t have just one wall height. Measure at every spot that matters for your design, like the low wall, the high wall, and where you plan to put a light or shelf.
Wall height is also where your phone’s range can fall short. LiDAR works well up to about 5 meters per surface, so in a double-height living room or stairwell, use the scan for the layout but a laser for the height. If you miss anything while scanning, the software will estimate it, so always do a final check of the floor, ceiling, and every corner before you leave the site.
Apple’s Measure app acts like a tape measure in augmented reality. On iPhone 12 Pro and newer, the LiDAR Scanner adds guide lines for heights and straight edges. The app is fast, but it only gives you one number at a time and doesn’t save your measurements. With a scan, you record the whole room, so you can always check any height you missed later.
How Accurate Does Your Wall Height Need to Be?
Paint and wallpaper projects are flexible. On a 12-foot wall, being off by half an inch only changes the area by about half a square foot, which is less than what you’ll trim anyway. The same goes for curtain rods, artwork, and shelving. A scan provides all the accuracy you need for these tasks.
Built-in projects are different. Floor-to-ceiling cabinets, paneling, and bookcases need to fit exactly between the floor and ceiling, so there’s little room for mistakes. Use the scan to plan your design and make sure it’s close, but always confirm the final measurement with a tape or laser before cutting anything.
How to Measure Wall Height From a Polycam Scan
- Start by scanning the room with Polycam. Use Space or Floorplan mode on a LiDAR iPhone or iPad. Move slowly and sweep the phone up and down as you walk, so the scan captures the floor, the full height of each wall, and the ceiling. If you have trouble seeing a corner or the ceiling line, turn on the flashlight in the capture screen.
- Place the Ruler with care. Open your scan, tap the Measure icon, and select a point where the wall meets the floor and another point directly above it on the ceiling. It helps to zoom in on each end before placing the points, since your measurement depends on their accuracy. You can drag either point to adjust it. The Ruler tool comes with every plan and is free.
- Let Auto Measure handle the walls. On Basic and above, Auto Measure generates measurements for the walls it detects, so you don’t have to place every point by hand.
- Pull heights and wall areas for the whole space. On Business and Enterprise, the Spatial Report on Polycam for Web lists the ceiling height for each room. It also gives wall area with and without openings, which is the figure you’d order paint or wallpaper from.
Try it on one room. Download Polycam for free.
Where Wall Height Measurements Go Wrong
Most mistakes happen because of the room, not the phone. Floors and ceilings are often not perfectly level, especially in older homes. If you only measure in the middle of a wall, you might miss a low corner. For built-in projects, measure at both ends and in the center, and use the shortest measurement for your plans.
Trim can also cause problems. Before you measure, decide if you need the height to the ceiling or to the bottom of the crown molding, and place your points accordingly. Sloped and vaulted ceilings don’t have just one wall height. Measure at every spot that matters for your design, like the low wall, the high wall, and where you plan to put a light or shelf.
Wall height is also where your phone’s range can fall short. LiDAR works well up to about 5 meters per surface, so in a double-height living room or stairwell, use the scan for the layout but a laser for the height. If you miss anything while scanning, the software will estimate it, so always do a final check of the floor, ceiling, and every corner before you leave the site.
FAQ
Which app is best for measuring wall height?
For every wall height in a room, scan with Polycam on a LiDAR iPhone or iPad and measure from the model. In Polycam’s testing, ceiling height typically matched a laser distometer exactly or within a few millimeters. For a single quick check, Apple’s built-in Measure app is free, though Apple describes its results as approximate.
Is the iPhone Measure app accurate enough for wall height?
It’s fine for quick checks, like whether a piece of furniture will clear the ceiling. Apple states that its measurements are approximate, so confirm any height you’ll order materials or cut against.
Can I measure wall height with an Android phone?
Polycam’s room capture needs a LiDAR iPhone or iPad and isn’t available on Android. Android AR measuring apps exist, but check whether the developer publishes an accuracy figure before you order materials based on one.
How do I measure a wall taller than 16 feet?
Use a laser distance meter for the height. Phone LiDAR is reliable to about 5 meters per surface, so a scan still captures the room’s layout but shouldn’t be your source for a tall wall’s height.
