# How to Measure Square Footage With Your Phone: Floors, Walls, Roofs

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Plain text: https://www.simplywise.com/blog/how-to-measure-square-footage-with-phone/llms.txt
Publisher: SimplyWise, Inc. (https://www.simplywise.com)
Published: October 29, 2026
Updated: October 29, 2026
Category: How to Estimate
Summary: How to measure square footage with phone apps for a material takeoff: floors, walls, roofs, decks, and fences on iPhone and Android, with waste factors.

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## How to Measure Square Footage With Your Phone for a Material Takeoff

Yes, your phone can do it. Measure length and width with Apple’s Measure app or an Android ARCore app, multiply, then add waste before you order.

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How to measure square footage with your phone, at a glance

1. Apple’s Measure app ships free on iPhone; a Pro model adds LiDAR.
2. Google’s own Measure app is gone; Android measures square footage through ARCore instead.
3. Floors: measure, then add a waste factor. Shaw Hardwood: 5 to 10 percent extra material.
4. Walls: measure length and height, subtract door and window openings, for paint or drywall.
5. Roofs: measure the footprint from the ground, then multiply by a pitch multiplier.
6. Decks and fences: measure with your phone; a motion sensor tool covers longer runs.

## Can you measure square footage with your phone for a material takeoff?

Yes. Measure each surface with your phone, multiply length by width, then add a waste factor before you order. For a single room, see how to measure a room with iPhone (https://www.simplywise.com/blog/measure-room-with-iphone/).

## How do you measure floor square footage with your phone for flooring or tile?

Open the Measure app and walk the room’s edges corner to corner, multiplying length by width for floor area. A Pro iPhone’s LiDAR scanner captures the whole floor in one pass. On Android, an ARCore app does the same job.

That raw number is not an order quantity: Shaw Hardwood’s own instructions call for a 5 to 10 percent waste factor, more for diagonal or herringbone installs.

## How do you measure wall square footage with your phone for paint or drywall?

Measure each wall’s length and height, multiply for gross square footage, and add the walls together. Then subtract the openings: measure each door and window, and subtract height times width.

## How do you measure a roof’s square footage from the ground with your phone?

You cannot safely walk a roof’s slope to measure it with your phone. Instead, measure the footprint or eave lines from the ground, then convert that flat footprint into actual roof area with a pitch multiplier, derived from rise over a 12 inch run. Read the pitch with a level, then apply the multiplier below.

| Roof pitch | Pitch multiplier | 2,000 sq ft footprint becomes |
| --- | --- | --- |
| 4 in 12 | 1.054 | 2,108 sq ft |
| 6 in 12 | 1.118 | 2,236 sq ft |
| 8 in 12 | 1.202 | 2,404 sq ft |
| 10 in 12 | 1.302 | 2,604 sq ft |
| 12 in 12 | 1.414 | 2,828 sq ft |

## How do you measure a deck or fence with your phone?

A deck prices by square footage; measure length and width like a floor. A fence prices by linear footage; walk the line and add the runs.

Both run outdoors past where the Measure app and most ARCore apps hold steady. Moasure, a motion sensor tool, covers that range: its own specs put length at up to 1,000 feet, accuracy within 0.5 percent.

## iPhone vs Android: what’s different for a material takeoff?

Both platforms measure square footage with your phone. The tools differ.

| Tool | Best for | Devices | Cost |
| --- | --- | --- | --- |
| Apple Measure app | Single dimensions, indoor | Supported iPhone models (iOS 12+) | Free, built in |
| LiDAR room scanner apps | Whole room in one pass | Pro iPhone (12 Pro+) or iPad Pro (2020 or later) | Free to paid |
| ARCore based Android apps | Single dimensions | ARCore certified Android phones | Free to paid |
| Moasure motion sensor tool | Long outdoor runs | iPhone and Android, Bluetooth | Paid device |

Google built its own Measure app, then stopped supporting it; the listing no longer resolves. ARCore stays active, and third party apps fill the gap.

## How to measure square footage with your phone, start to finish

1. Pick the tool for the surface Measure app or ARCore app for a wall or floor. LiDAR scanner on a Pro iPhone for a whole room. Moasure for a long fence, deck, or roof footprint.
2. Measure the surface and record the raw numbers Corner to corner for a floor or wall, eave to eave for a roof, run to run for a fence.
3. Apply the waste factor or the pitch multiplier Add 5 to 10 percent to flooring per Shaw’s instructions, subtract openings from a wall total, or apply a roof’s pitch multiplier.
4. Turn the takeoff into a priced estimate Photograph the space and let SimplyWise Cost Estimator build material, labor, and fee lines. Enter your quantities, adjust, and send the quote.

## SimplyWise Cost Estimator for your takeoff

Once you measure square footage with your phone, SimplyWise Cost Estimator turns a job site photo into an itemized estimate in about 6 seconds. Material, labor, and fee lines are editable, so your quantities drop straight in. It runs on iPhone and Android, free to try, then $29.99/mo or $239.99/yr, about $20/mo on annual, after a 7-day free trial.

## Keep reading

- How to Measure a Room With iPhone (https://www.simplywise.com/blog/measure-room-with-iphone/): a single space.
- Which iPhones Have LiDAR (https://www.simplywise.com/blog/which-iphones-have-lidar/): the model reference.
- Deck Material Calculator (https://www.simplywise.com/blog/deck-material-calculator/): your deck’s material list.

## Sources

Captured live 2026-09-26 unless noted.

### Apple

- Apple Support, Measure dimensions with iPhone (https://support.apple.com/guide/iphone/measure-dimensions-iphd8ac2cfea/ios).
- Apple Newsroom, iPhone 12 Pro and iPhone 12 Pro Max (https://www.apple.com/newsroom/2020/10/apple-introduces-iphone-12-pro-and-iphone-12-pro-max-with-5g/).
- Apple Developer, RoomPlan (https://developer.apple.com/augmented-reality/roomplan/).

### Google

- Google for Developers, ARCore supported devices (https://developers.google.com/ar/devices).
- Google for Developers, ARCore (https://developers.google.com/ar).
- Google Play, Measure app listing (https://play.google.com/store/apps/details?id=com.google.android.apps.measure), no longer live.

### Manufacturer and third party specs

- Shaw Hardwoods, Solid Hardwood Installation Instructions (https://mmllc-images.s3.amazonaws.com/sites/fliq_flbl/documents/installation/install_hardwood_shaw_solid.pdf).
- Moasure, Accuracy (https://www.moasure.com/pages/accuracy).

### SimplyWise

- SimplyWise Cost Estimator on the App Store (https://apps.apple.com/us/app/simplywise-cost-estimator/id6670619664), 4.8 rating, verified 2026-09-25.

## Frequently asked questions about measuring square footage with your phone

### The basics

**Can I measure square footage with my phone instead of a tape measure?**

Yes. The Measure app and ARCore based Android apps measure square footage with your phone well enough for flooring, paint, drywall, and deck lists. Verify a permit or cut list dimension with a tape. SimplyWise Cost Estimator then turns a job photo into an itemized estimate in about 6 seconds.

**How accurate is a phone measurement for a material takeoff?**

Apple publishes no exact tolerance for the Measure app, nor does Google’s ARCore. Phone measurement is strong for scoping square footage in good light at short range. Confirm anything that carries real money with a tape first.

### iPhone vs Android

**Does Android have an app like Apple’s Measure app?**

Not from Google. Its Measure app listing no longer resolves on the Play Store. Android measures square footage with your phone through ARCore instead.

**Can I measure a roof with my phone without climbing on it?**

Yes. Measure the footprint or eave lines from the ground, then multiply by the pitch multiplier. Never walk the roof to measure it.

### Estimating the job

**How much extra flooring should I order for waste?**

Shaw Hardwood’s own instructions call for a 5 to 10 percent waste factor, more for diagonal, herringboned, or bordered layouts. Check your own manufacturer’s sheet first.

**Can SimplyWise Cost Estimator turn a phone measurement into a quote?**

Yes. Measure the surface with your phone, then photograph the space. SimplyWise Cost Estimator turns it into an itemized estimate in about 6 seconds, with material, labor, and fee lines you edit. Free to try, then $29.99/mo or $239.99/yr, about $20/mo on annual, after a 7-day trial.

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## About SimplyWise

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