---
title: "Carpenter Square & Stair Calc - Reviews, Revenue and Downloads in United States | Apple App Store"
description: "Three essential construction tools in one pocket-sized app. Carpenter Square gives you corner squaring (Pythagorean theorem), a complete stair calculator with building code support, and a digital bubb"
---

# Carpenter Square & Stair Calc — United States
> Construction Framing + Level

![Carpenter Square & Stair Calc App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple211/v4/8c/2c/1b/8c2c1bab-16d8-c157-3caf-d81523fc69d1/AppIcon-0-0-1x_U007emarketing-0-6-0-85-220.png/434x0w.png)

**Developer:** [Red Shepard](https://apptail.io/developer/red-shepard-xqxd)
**Category:** Utilities
**Rating:** 4.6/5 (36 ratings)
**Price:** Free
**Bundle ID:** com.redshepard.carpentersquare
**Store:** Apple App Store
**Country:** United States
**Version:** 2.9 (released 2026-02-10)
**Original Release:** 2017-11-06
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/us/app/app/id1305126201)
**AppTail Page:** [https://apptail.io/app/carpenter-square-stair-calc-gyhe/united-states](https://apptail.io/app/carpenter-square-stair-calc-gyhe/united-states)

## Carpenter Square & Stair Calc Description
Three essential construction tools in one pocket-sized app. Carpenter Square gives you corner squaring (Pythagorean theorem), a complete stair calculator with building code support, and a digital bubble level — all with direct tape measure input in feet, inches, and sixteenths. No decimal conversion. No signup. Just open and go.

-----------------------------------------
CORNER SQUARING CALCULATOR
-----------------------------------------

Square your corners in seconds — not minutes. Enter any 2 sides of a right triangle and we instantly calculate the 3rd.

• Input directly in feet, inches, and sixteenths — straight from your tape measure
• Calculates any missing side: Leg A, Leg B, or hypotenuse
• Visual triangle diagram with all three measurements labeled
• Save and recall your 7 most recent calculations
• Input validation catches impossible triangles before you waste material

Whether you're checking a foundation, squaring a deck frame, or verifying a wall layout — get your answer and get back to work.

-----------------------------------------
STAIR CALCULATOR
-----------------------------------------

Enter your floor-to-floor height and get a complete stair layout instantly. No more guessing riser counts or pulling out a separate calculator for stringer cuts.

• Number of risers and treads — calculated to code
• Exact riser height — evenly distributed across all steps
• Customizable tread depth (default 10", adjustable 9"–14")
• Total run — the full horizontal distance of your staircase
• Stringer length — the diagonal measurement for your cut
• Required floor opening — sized to your headroom clearance
• Stair angle in degrees
• Residential (8" max rise) and Commercial (7" max rise) building code support
• Headroom clearance calculation (default 6'8" minimum)
• Visual staircase diagram with labeled dimensions
• Save and recall previous staircase designs

Building code compliance note included with every calculation. Always verify with your local building official.

-----------------------------------------
DIGITAL BUBBLE LEVEL
-----------------------------------------

Turn your iPhone into a precision level. Uses your device's built-in motion sensors to give you real-time tilt measurements.

• Animated bubble indicator moves with your device
• Angle displayed in degrees with 0.1° precision
• +/- 25° measurement range
• No calibration needed — works immediately

-----------------------------------------
BUILT FOR THE JOB SITE
-----------------------------------------

Carpenter Square was designed and engineered by contractors with more than 30 years in the building industry. Every feature is built around one principle: tape measure in, answer out.

• Measurements in feet, inches, and sixteenths — the way you actually measure
• Fractions auto-simplify for easy reading (8/16 > 1/2, 14/16 > 7/8)
• Save up to 7 recent calculations per tool — tap to recall instantly
• Visual diagrams for every calculation so you can verify at a glance
• Under 2.5 MB — downloads in seconds, even on spotty job-site signal
• No account required. No data collected. No ads. Just the tools you need.

Perfect for carpenters, framers, general contractors, remodelers, deck builders, stair builders, and anyone who needs fast, accurate construction math without fumbling with a calculator.

Download Carpenter Square and get back to building.

## Carpenter Square & Stair Calc Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource221/v4/db/62/48/db624863-3df3-b943-b728-41d8896bcc14/Screen_1_v2@3x.png/1284x2778.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/40/54/b1/4054b149-a3f0-74ad-231b-012b48e935e9/Screen_2_v2@3x.png/1284x2778.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/36/2c/98/362c9850-64b6-f284-6117-afcaffda2de2/Screen_3_v2@3x.png/1284x2778.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/PurpleSource211/v4/40/6a/88/406a88f9-4ed5-fdb8-7023-a30929cf1e4e/Screen_4_v2@3x.png/1284x2778.png)

## Carpenter Square & Stair Calc Rating Breakdown in United States
- 5 stars: 26 (72%)
- 4 stars: 5 (14%)
- 3 stars: 4 (11%)
- 2 stars: 1 (3%)
- 1 stars: 0 (0%)

## Carpenter Square & Stair Calc Reviews in United States

### ***** "Update bug"
I’m also having issues inputting the second measurement. It only lets me put one digit, and then it freezes. It used to work before the update.
-- Eslice335, 2025-03-12

### *---- "Update glitch"
Ever since the new update when you go to input the second measurement, it only allows a single digit under the foot so you have to convert everything to inches in order to get your square. Very annoying.
-- X156788, 2024-10-30

### ***** "Feet and inches"
This app is a great idea and it calculates in feet and inches and in 16th . It’s perfect!
-- Greg Deel, 2018-04-21

### ***** "Interior designer"
I love this little app for its quick calculations and bubble leveler.... so easy to use and right on my phone. No carrying extra calculators! Also Nice feature with the family sharing…I have my whole staff using it.
-- JD -PT, 2017-12-09

[View all Carpenter Square & Stair Calc reviews and detailed analytics on AppTail](https://app.apptail.io/signup?utm_campaign=ai-crawl&utm_content=reviews)




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