Best Stair Calculator Apps

222+ iOS apps curated and reviewed

4.6 avg rating
17 free apps
Updated May 2026

Stair Calculator Pro is the household name in stair calculator, but it's far from the only option. We track 222+ alternatives and competitors on iOS β€” many free, many higher-rated than you'd expect.

Top Picks for Stair Calculator

Stair Calculator: Construction#2

Stair Calculator: Construction by Phan Nhat Đang

Step, Run, Rise, Angle, Length
Strong Contender
πŸ”§ Utilities
4.1😞(732 ratings)
FreeAdsIn-App Purchases
Stair Calculator: Construction screenshot 1
Stair Calculator: Construction screenshot 2
Stair Calculator: Construction screenshot 3

This app calculates essential parameters for stair construction, offering flexibility in input and providing multiple step set options. It supports various units and allows results to be easily copied.

What We Love

  • πŸ‘ Easy to use
  • πŸš€ Helpful information
  • πŸš€ Provides useful calculations

Room to Improve

  • πŸ› Doesn't work as expected
  • πŸ”’ No way to cancel subscription
  • πŸ”’ Difficult to cancel trial
RedX Stairs - 3D Calculator#3

RedX Stairs - 3D Calculator by RedX Technology Inc

Design & Calculate Stairs
Worth Considering
πŸ”§ Utilities
4.5(397 ratings)
FreeIn-App Purchases
RedX Stairs - 3D Calculator screenshot 1
RedX Stairs - 3D Calculator screenshot 2
RedX Stairs - 3D Calculator screenshot 3
RedX Stairs - 3D Calculator screenshot 4
RedX Stairs - 3D Calculator screenshot 5
RedX Stairs - 3D Calculator screenshot 6

This app simplifies complex stair calculations and designs with advanced 3D visualization. It offers a comprehensive suite of calculators for various stair types, supporting multiple measurement units and providing detailed, to-scale plans for professionals and DIYers.

More Stair Calculator apps to explore

4
Construction Master Pro Calc
Construction Master Pro Calc
Construction Master Pro Calc
Feet Inch Fraction Calculator
Free

This app is a powerful construction calculator designed for professionals working with dimensions. It offers a wide range of solutions for dimensional math, right angle calculations, area and volume, and special functions, helping to improve speed and accuracy in layouts, bids, and estimates.

Dimensional math and conversionsRight angle and rafter calculationsArea and volume solutions
πŸ”§ Utilities
(39K)
free with in-app purchases
5
Feet and Inches Calculator
Feet and Inches Calculator
Feet and Inches Calculator
Perfect Construction Calc!
Free

A powerful construction calculator designed for tradespeople. It offers a wide range of tools for estimating, layout, framing, and jobsite calculations, helping to save time and improve accuracy. Supports both imperial and metric units.

Construction math and estimatingLayout, framing, and jobsite calculationsImperial and metric unit conversion
πŸ”§ Utilities
(384)
free with in-app purchases
6
Stair Calculator .
Stair Calculator .
Stair Calculator .
stair stringer calculator
Free
πŸ”§ Utilities
(0)
7
Stair Calculator: Run & Rise
Stair Calculator: Run & Rise
Stair Calculator: Run & Rise
Stair Calculator - Stringer
Free

This app offers tools to simplify stair design and construction calculations. It visualizes stair appearance based on total run and rise, allowing adjustments to the number of steps and their dimensions. Results can be easily shared.

Stair design visualizationCalculate riser heightStair slope in degrees
πŸ”§ Utilities
(33)
free
8
CMM Stair Rail Calculator
CMM Stair Rail Calculator
CMM Stair Rail Calculator
Tool for fence contractors
Free
πŸ”§ Utilities
(0)
9
Construction Master 5 Calc
Construction Master 5 Calc
Construction Master 5 Calc
Feet Inch Fraction Calculator
Free

This app is a powerful feet-inch-fraction calculator designed for construction professionals. It offers advanced calculation capabilities for layouts, bids, and estimates, simplifying complex measurements and conversions for enhanced project accuracy and efficiency.

Feet-inch-fraction calculationsRight angle and rafter calculationsArea and volume solutions
πŸ”§ Utilities
(12K)
free with in-app purchases
10
Stair Stringer
Stair Stringer
Stair Stringer
Calculates Stringer Measures
$1.99

This app calculates all necessary measurements for building a stair stringer, including risers, run, angle, and length. Easily adjust parameters and switch between Imperial and Metric units. Share your calculated results via email or text.

Calculates stair risers and runDetermines stair angle and stringer lengthCalculates step height and tread depth
πŸ”§ Utilities
(75)
paid
11
Carpenter Tools - Calculator
Carpenter Tools - Calculator
Carpenter Tools - Calculator
Framing, Stairs, Roof & More
Free

This app simplifies carpentry calculations for framing, roofing, stairs, and more. Quickly get accurate measurements and material counts without complex formulas or spreadsheets. Ideal for on-site work, shop use, or estimating.

Framing calculationsRafter and roof calculationsStair rise and run
πŸ”§ Utilities
(5)
free with in-app purchases
12
Concrete Calculator Plus
Concrete Calculator Plus
Concrete Calculator Plus
by Inch Calculator
Free

This app provides 15 calculators for estimating concrete, blocks, mortar, rebar, and gravel. It supports various shapes and units, offering material cost estimations for construction projects.

15 concrete estimation calculatorsEstimates cubic yards or bagsCalculates material costs
πŸ”§ Utilities
(21K)
ad-supported
13
Buildr - Building Calculator
Buildr - Building Calculator
Buildr - Building Calculator
Measure - Plan - Build
Free

This app streamlines construction calculations for professionals and DIYers. It simplifies complex math for projects like roofing, staircases, and material estimation, offering interactive tools for precise measurements and reduced waste.

Interactive wall framingStaircase builderCubic and square meter tally
πŸ”§ Utilities
(13)
free with in-app purchases
14
Stair Help
Stair Help
Stair Help
Staircase Calculator
$1.99

This application simplifies staircase construction by accurately calculating essential measurements like riser, going, and stringer lengths. It offers customizable units, riser height, and precision settings for fractions and decimal places.

Calculate riser, going, stringer, and base lengthsSet preferred units (mm, cm, inches)Adjustable max riser height
πŸ”§ Utilities
(230)
free
15
Chippy Tools: Construction
Chippy Tools: Construction
Chippy Tools: Construction
Construction Calculator
Free

This app simplifies complex calculations for construction professionals. It offers a variety of tools for tasks like spacing, measurements, and material estimation, helping to reduce errors and save time on job sites. Available on iPhone and iPad, it aims to be an essential tool for tradespeople.

Baluster spacing calculatorFlat run attached baluster calculatorSquare calculator
πŸ”§ Utilities
(946)
freemium
16
Baluster Calculator Elite
Baluster Calculator Elite
Baluster Calculator Elite
Spindle and Railing Calculator
$8.99

This app calculates precise baluster spacing for handrails, accommodating both flat and sloped surfaces. It provides detailed measurements for installation, including the number of balusters, spacing between them, and marking points. Users can also switch between metric and imperial units for convenience.

Flat railing calculationsStair railing calculationsMax baluster spacing input
πŸ”§ Utilities
(307)
paid
17
Construction Calculator
Construction Calculator
Construction Calculator
Feet Inch Calculator
Free

This app is a powerful calculator designed for construction and woodworking professionals, as well as students. It simplifies calculations involving feet, inches, and fractions, offering conversions between various measurement units and displaying equations and results simultaneously. Advanced features are available through optional in-app purchases.

Decimal to fraction converterFraction to decimal conversionSimultaneous equation and result display
πŸ”§ Utilities
(554)
free with in-app purchases
18
The Chippy Calc: Calculator
The Chippy Calc: Calculator
The Chippy Calc: Calculator
Stairs, Decks, Rafters, Walls
Free

This app provides carpenters, builders, and DIYers with precise, visual construction calculations. It offers specialized tools for stairs, decks, rafters, and more, with support for both metric and imperial units. All calculations can be saved and accessed offline.

Visual results with scaled diagramsMetric and imperial unit supportOffline functionality
πŸ”§ Utilities
(2)
free with in-app purchases
19
Feet & Inches Tape Calculator
Feet & Inches Tape Calculator
Feet & Inches Tape Calculator
Calculate feet & inches
Free

This app provides a convenient way to perform calculations involving feet and inches. It features a visual tape measure display and supports fractions and mixed decimals, showing results in feet, inches, and centimeters.

Swift measurement calculationsSupport for fractions and mixed decimalsDisplay results in feet, inches, and centimeters
πŸ”§ Utilities
(9.2K)
free with in-app purchases
20
Builder's Helper MAX
Builder's Helper MAX
Builder's Helper MAX
Construction Calculator +
Free

This comprehensive construction app offers advanced calculation tools for linear, square, and cubic measurements in both imperial and metric units. It includes features for roof pitch, stair lengths, and a memory bank for storing values. Manage projects with detailed lists, store documents and images, and utilize quick job calculators for various construction tasks.

Advanced construction calculator (imperial/metric)Roof pitch and rafter length calculationsProject management with data lists
πŸ”§ Utilities
(1.6K)
free with in-app purchases

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