StairCalc: Stair Builder Calc
Stairs, Decking & Concrete
Free · In‑App Purchases
All-in-one stair, decking, and concrete estimator.
Set restrictions to guarantee compliance with building guidelines.
Used by carpenters in the USA and the World.
Stair framing, decking, flooring and concrete calculator.
StairCalc is designed for carpenters, contractors and builders who need accurate stair, decking & flooring calculations.
No need to remember complex data entry steps in order to enter data - start entering in any field.
Double tap on buttons for help and guides.
Simultaneously find solutions when restrictions on tread, step rise, incline and '2R+G'/'2R+TD' are required.
Select to apply some all or none of the restrictions depending on your situation.
NOTE: Those pre-filled are not to be relied upon as Building Regulations vary greatly within countries and regions within those countries.
Please check your local regulations and amend as required.
Accurate and reliable, it is an indispensable tool for the stair framing, decking & flooring construction pro.
Developed by carpenters and used by contractors and builders around the world.
Metric or US/Imperial (feet, inches - decimal or fractions) tap icon to change.
Also includes a general calculator simplified for construction calculations including a tape which can be emailed.
STAIRCALC INCLUDES:-
STAIR FRAMING (currently for single stair runs):-
In addition to handling multiple restrictions simultaneously Staircalc also allows for situations where the overall stair rise is fixed or the stair run is fixed or both rise and run are fixed allowing maximum flexibility.
◆ Number and size of step risers,
◆ Number and size of treads, step inclines,
◆ Step incline,
◆ Stairwell opening,
DECKING & FLOORING SETOUT, MATERIAL ESTIMATING and COSTING:-
◆ Options for Insets, single or double bearers
◆ Set Spacing type to maximum, fixed or equal
◆ Set pricing for materials / labour to calculate cost and cost/area
◆ Print, email or message lists and even makes notes on first
TIMBER SETOUT:-
Calculate and print list of stout positions.
◆ Equally spaced, maximum spacing or fixed spacing options;
◆ Insets at start and end.
◆ Lists of set out positions;
◆ Print, email or message lists and even makes notes on first;
CONCRETE ESTIMATOR:-
◆ Concrete Calculator/Estimator for Slabs, footings, round and rectangular/square holes
◆ Calculate quantities for slabs, footings, round and rectangular/square holes.
◆ Estimates total volume and cost allowing for waste.
CONVERTER:-
◆ Convert Lengths, Area, Volume: Metric and US/Imperial.
◆ Work in Decimal units or Yds/Ft/In/Fraction format to Metric, decimal US.
EASY TO USE GENERAL CALCULATOR WITH TAPE:
◆Calculate (add, subtract etc) directly in feet / inches / fractions or decimals.
◆Common functions for quick calculation
EXTENSIVE HELP:
Extensive help - Single touch brings up brief help at top of screen ,tap twice on most buttons for more info.
Optimised for all iPhones and iPads in portrait mode.
INFOGUIDE:
Infoguide is part of a small building firm based in Western Australia. This app was created by a former Roof Framing Carpenter for our team of carpenters. We use it and believe it will be as helpful to other carpenters as it was for us.
Terms of Service: http://www.apple.com/legal/itunes/appstore/dev/stdeula
more I just purchased this in order to figure a stairway that will rise 7' with a 4' landing and another 7' rise. There is nothing intuitive about this and there are no instructions. Save your money. Now if I can just get the App Store to refund my $6.99.
Developer Response Hi RevB,Sorry you were not happy with the experience.You can get detailed help on each button by double tapping it. Also the 'help' button on the top Left of the screen gives a quick overview.You do not need to enter in any order and values are saved as changed and recalculated.Main choices are to 1): Select whether the overall stair rise or run are both changing or either is fixed -' Long Press' to Change (orange Buttons).2): Select if restrictions are to apply - 'Long Press' - ON or OFF - scroll up to set restrictions values.Please email us from Setting -> More Information->Support and we are more than ready to assist.Kind RegardsStairCalc - Developers
I just purchased this in order to figure a stairway that will rise 7' with a 4' landing and another 7' rise. There is nothing intuitive about this and there are no instructions. Save your money. Now if I can just get the App Store to refund my $6.99.
Hi RevB,Sorry you were not happy with the experience.You can get detailed help on each button by double tapping it. Also the 'help' button on the top Left of the screen gives a quick overview.You do not need to enter in any order and values are saved as changed and recalculated.Main choices are to 1): Select whether the overall stair rise or run are both changing or either is fixed -' Long Press' to Change (orange Buttons).2): Select if restrictions are to apply - 'Long Press' - ON or OFF - scroll up to set restrictions values.Please email us from Setting -> More Information->Support and we are more than ready to assist.Kind RegardsStairCalc - Developers
Version 3.71: Bug Fix System crash on start in some settings
3.71 12/27/2025
Version 3.70: Bug fixes, improved performance and future-ready features.
3.70 12/05/2025
Version 5.50: Minor bug fixes
3.50 12/12/2024
VERSION 5.48:
Minor bug fix 1) - Entry of 'mm' freezing in some situations on return from standalone calculator - Thanks Adam for the heads up;
2) - Crash on startup in very rare circumstances
3.48 10/08/2024
VERSION 3.02:
Minor bug fix.
3.02 07/26/2023
VERSION 3.01:
Minor performance improvements and bug fixes.
Requires IOS16.4+
3.01 07/19/2023
Version 3.00:
Design overhaul, with features such as Metric/Imperial, stand-alone calculator, settings now available form each tab.
Combined Stairs restrictions and calculations into 1 screen.
3.00 07/17/2023
Version 2.26:
Fixed Bugs relating to IOS 13
Version 2.25:
Fix bug in emailing simple calculator tab, with minor performance improvements.
VERSION 2.20:
Small performance improvements also Long Press option more obvious and with feedback via vibration when selected.
VERSION 2.11:
Fixes bug where sharing PDF or printing various lists only printed the first page.
VERSION 2.1
This update includes the addition of ‘DECKING’ - a decking & flooring estimator / calculator.
Decking provides material layout, quantities, costing in a convenient 1 screen view.
The update also removes reference to a French Version (our apologies) which while started has not been completed and was included in error.
Decking has been added as new tab.
Tabs can be reorganised if required by going to the 'More' tab and pressing 'Edit'. Swipe the preferred Tabs to the tab bar at the bottom and 'Done'.
Older tabs will be gradually updated to the newer format based on feedback we receive.
The app requires IOS 11 or higher and is optimised for iPads & iPhones - Including iPhone XS, XSMax.
Requires Full Screen at the moment on the iPad.
Please provide feedback on any features you would like to see added or any areas you would like to be improved - we will respond!
We never prompt you for a review because we know your time is valuable.
If you a few moments please leave a rating or if you can spare the time, please leave a review.
It makes a big difference to us!
Go to Settings->More Information-> Review Us In The App Store
Version 2.0:
Includes the addition of new calculators - Set Out , Concrete Estimator, Converter (Length, Area, Volume).
Also included are some general improvements and minor bug fixes in the stand alone general calculator.
New Calculators:-
• Setout / Timber Spacing Layout - includes insets, timber width and equal, fixed and maximum settings;
• Convert - Allows conversion of length, area and volume. Convert between metric and US/imperial units including decimal and fractional units yards, feet & inches.
2.26 09/25/2019
Version 2.25:
Fix bug in emailing simple calculator tab, with minor performance improvements.
VERSION 2.20:
Small performance improvements also Long Press option more obvious and with feedback via vibration when selected.
VERSION 2.11:
Fixes bug where sharing PDF or printing various lists only printed the first page.
VERSION 2.1
This update includes the addition of ‘DECKING’ - a decking & flooring estimator / calculator.
Decking provides material layout, quantities, costing in a convenient 1 screen view.
The update also removes reference to a French Version (our apologies) which while started has not been completed and was included in error.
Decking has been added as new tab.
Tabs can be reorganised if required by going to the 'More' tab and pressing 'Edit'. Swipe the preferred Tabs to the tab bar at the bottom and 'Done'.
Older tabs will be gradually updated to the newer format based on feedback we receive.
The app requires IOS 11 or higher and is optimised for iPads & iPhones - Including iPhone XS, XSMax.
Requires Full Screen at the moment on the iPad.
Please provide feedback on any features you would like to see added or any areas you would like to be improved - we will respond!
We never prompt you for a review because we know your time is valuable.
If you a few moments please leave a rating or if you can spare the time, please leave a review.
It makes a big difference to us!
Go to Settings->More Information-> Review Us In The App Store
Version 2.0:
Includes the addition of new calculators - Set Out , Concrete Estimator, Converter (Length, Area, Volume).
Also included are some general improvements and minor bug fixes in the stand alone general calculator.
New Calculators:-
• Setout / Timber Spacing Layout - includes insets, timber width and equal, fixed and maximum settings;
• Convert - Allows conversion of length, area and volume. Convert between metric and US/imperial units including decimal and fractional units yards, feet & inches.
2.25 02/06/2019
VERSION 2.20:
Small performance improvements also Long Press option more obvious and with feedback via vibration when selected.
VERSION 2.11:
Fixes bug where sharing PDF or printing various lists only printed the first page.
VERSION 2.1
This update includes the addition of ‘DECKING’ - a decking & flooring estimator / calculator.
Decking provides material layout, quantities, costing in a convenient 1 screen view.
The update also removes reference to a French Version (our apologies) which while started has not been completed and was included in error.
Decking has been added as new tab.
Tabs can be reorganised if required by going to the 'More' tab and pressing 'Edit'. Swipe the preferred Tabs to the tab bar at the bottom and 'Done'.
Older tabs will be gradually updated to the newer format based on feedback we receive.
The app requires IOS 11 or higher and is optimised for iPads & iPhones - Including iPhone XS, XSMax.
Requires Full Screen at the moment on the iPad.
Please provide feedback on any features you would like to see added or any areas you would like to be improved - we will respond!
We never prompt you for a review because we know your time is valuable.
If you a few moments please leave a rating or if you can spare the time, please leave a review.
It makes a big difference to us!
Go to Settings->More Information-> Review Us In The App Store
Version 2.0:
Includes the addition of new calculators - Set Out , Concrete Estimator, Converter (Length, Area, Volume).
Also included are some general improvements and minor bug fixes in the stand alone general calculator.
New Calculators:-
• Stud Wall Timber estimator, including a costing function;
• Setout / Timber Spacing Layout - includes insets, timber width and equal, fixed and maximum settings;
• Convert - Allows conversion of length, area and volume. Convert between metric and US/imperial units including decimal and fractional units yards, feet & inches.
2.20 01/03/2019
VERSION 2.11: Fixes bug where sharing PDF or printing various lists only printed the first page.
VERSION 2.1
This update includes the addition of ‘DECKING’ - a decking & flooring estimator / calculator.
Decking provides material layout, quantities, costing in a convenient 1 screen view.
The update also removes reference to a French Version (our apologies) which while started has not been completed and was included in error.
Decking has been added as new tab.
Tabs can be reorganised if required by going to the 'More' tab and pressing 'Edit'. Swipe the preferred Tabs to the tab bar at the bottom and 'Done'.
Older tabs will be gradually updated to the newer format based on feedback we receive.
The app requires IOS 11 or higher and is optimised for iPads & iPhones - Including iPhone XS, XSMax.
Requires Full Screen at the moment on the iPad.
Please provide feedback on any features you would like to see added or any areas you would like to be improved - we will respond!
We never prompt you for a review because we know your time is valuable.
If you a few moments please leave a rating or if you can spare the time, please leave a review.
It makes a big difference to us!
Go to Settings->More Information-> Review Us In The App Store
Version 2.0:
Includes the addition of new calculators - Set Out , Concrete Estimator, Converter (Length, Area, Volume).
Also included are some general improvements and minor bug fixes in the stand alone general calculator.
New Calculators:-
• Stud Wall Timber estimator, including a costing function;
• Setout / Timber Spacing Layout - includes insets, timber width and equal, fixed and maximum settings;
• Convert - Allows conversion of length, area and volume. Convert between metric and US/imperial units including decimal and fractional units yards, feet & inches.
2.11 10/22/2018
VERSION 2.1
This update includes the addition of ‘DECKING’ - a decking & flooring estimator / calculator.
Decking provides material layout, quantities, costing in a convenient 1 screen view.
The update also removes reference to a French Version (our apologies) which while started has not been completed and was included in error.
Decking has been added as new tab.
Tabs can be reorganised if required by going to the 'More' tab and pressing 'Edit'. Swipe the preferred Tabs to the tab bar at the bottom and 'Done'.
Older tabs will be gradually updated to the newer format based on feedback we receive.
The app requires IOS 11 or higher and is optimised for iPads & iPhones - Including iPhone XS, XSMax.
Requires Full Screen at the moment on the iPad.
Please provide feedback on any features you would like to see added or any areas you would like to be improved - we will respond!
We never prompt you for a review because we know your time is valuable.
If you a few moments please leave a rating or if you can spare the time, please leave a review.
It makes a big difference to us!
Go to Settings->More Information-> Review Us In The App Store
Version 2.0:
Includes the addition of new calculators - Set Out , Concrete Estimator, Converter (Length, Area, Volume).
Also included are some general improvements and minor bug fixes in the stand alone general calculator.
New Calculators:-
• Stud Wall Timber estimator, including a costing function;
• Setout / Timber Spacing Layout - includes insets, timber width and equal, fixed and maximum settings;
• Convert - Allows conversion of length, area and volume. Convert between metric and US/imperial units including decimal and fractional units yards, feet & inches.
2.10 10/12/2018
Thanks For Using StairCalc. Version 2.0 includes the addition of new calculators - Set Out , Concrete Estimator, Converter (Length, Area, Volume).
Also included are some general improvements and minor bug fixes in the stand alone general calculator.
New Calculators:-
• Stud Wall Timber estimator, including a costing function;
• Setout/Timber Spacing Layout - includes insets, timber width and equal,fixed and maximum settings;
• Convert - Allows conversion of length, area and volume. Convert between metric and US/imperial units including decimal and fractional units yards,feet & inches.
The additions have been added as new tabs.
Based on feedback we have changed to a more classic button with data Entry directly on the buttons - not at the top of screen as in the older tabs.
Depending on feedback we will move to change the existing tabs (Spreadsheet cell format) in a future release.
Because of the limitation to 5 visible tab button the remaining tabs are accessible from the 'More' tab.
The tabs can be reorganised by going to the 'More' tab and pressing 'Edit'. Swipe the preferred Tabs to the tab bar at the bottom and 'Done'.
The app requires IOS 11 and is optimised for iPads & iPhones - Including iPhone X.
Requires Full Screen at the moment on the iPad.
Please provide feedback on any features you would like to see added or any areas you would like to be improved - we will respond!
We never prompt you for a review because we know your time is valuable.
If you a few moments please leave a rating or if you can spare the time, please leave a review.
It makes a big difference to us!
Go to Settings->More Information-> Review Us In The App Store
2.0 06/12/2018
Minor Bug Fix
1.21 05/09/2016
Minor Bug Fixes & performance Improvements
We welcome feedback - Settings> More Information > Email - if you have any feedback or suggestions for corrections or future improvements.
1.20 01/07/2016
Bug fixes & small updates.
Updated Calculator Tab (general construction calculations) to also allow inverse trig functions for cos,sin & tan - just tap Fn button to alternate between versions.
We welcome feedback - Settings> More Information > Email - if you have any feedback or suggestions for corrections or future improvements.
1.11 11/16/2015
Bug fixes & small updates.
Updates Include:-
Updated Calculator Tab (general construction calculations) to also allow entry of feet inches & fractions for direct use in calculations.
Entry and display of feet/inches is displayed on the On-Screen Tape - while the decimal result is visible on the main display at the same time.
Allowed selection of rounding options for decimal and fractions (of inches) - double tap for HELP on feet/inches/fractions or decimal pt - LONG PRESS to change values.
Added memory buttons.
We appreciate feedback - Settings> More Information > Email - if you have any feedback or suggestions for corrections or future improvements.
1.10 10/28/2015
Bug fixes:
Corrected error in autocomplete for some situations in US measurements.
Corrects email link under the Tab - Settings>More Info.
Following iPad Only : Fixed occasional crash in iPad version when undo (which is visible on the iPad keyboard) was used instead of backspace. Undo now follows the actions of the backspace key.
Now also allows standard iPad keyboard 'Done' and '/' to be used as well as the accessory keyboard versions on US Measurements.
We welcome feedback - Settings> More Information > Email.
Easily contact us for assistance or if you have any feedback or suggestions for corrections or future improvements.
1.01 08/10/2015
Version 3.71: Bug Fix System crash on start in some settings
more Version 3.71 12/27/2025
Data Not Collected The developer does not collect any data from this app.
