Construction Calc Pro 77.31

83 Powerful, Proven & Precise Tools.

Enter measurements in feet/inches or metric.

There is no complicated manual to master or instructions to follow, just enter data and get precise results.

HIGH VISIBILITY IN DIRECT SUNLIGHT

White on black text, with blue and orange inputs and outputs for high visibility in direct sunlight.

CALCULATORS INCLUDE:

AGGREGATE

Inputs: Width, Length, Thickness, Density, Wastage
Outputs: Weight, Volume

ASPHALT

Inputs: Width, Length, Thickness
Outputs: Weight, Volume

BALUSTERS

Inputs: Run length, Baluster width, Baluster spacing
Outputs: Qty of balusters, Qty spaces, Baluster spacing (center-to-center), Baluster spacing (edge-to-edge), Measurements to far side of each baluster

BOARD / LINEAL FOOT

Inputs: Thickness, Width, Length, Quantity
Outputs: Board feet, Lineal feet

CONCRETE

Inputs: Width, Length, Thickness, Use rebar option, Rebar spacing along width, Rebar spacing along length
Outputs: Volume, 60lb premixed bags, 80lb premixed bags, 10kg premixed bags, 25kg premixed bags, 50kg premixed bags, Rebar required

CROWN MOULDING
Inputs: Wall angle (corner of wall), Crown (spring) angle
Outputs: Miter angle, Bevel angle

DROP CEILING

Inputs: Length at ceiling, Width at ceiling, Tile size, Distance (anchor to drop ceiling)
Outputs: Ceiling area, Ceiling tiles, Perimeter moulding, Main supports, Tee support peices, Wire length (each), Wire length (total), Wire anchors

DRYWALL

Inputs: Room width, Room length, Room height, Panel width, Panel height, Include ceiling option
Outputs: Area - surface area. Materials - Drywall panels. Joint compounds - Readymixed, Lightweight readymixed, Setting-type, Lightweight setting-type. Fastener - Drywall nails, Drywall screws. Additional items: Joint tape, Primer, Adhesive

FLOORING
Inputs: Width, Length, Wastage, Square Ft or M per box
Outputs: Total area, Boxes needed
FRAMING
Inputs: Total wall length, Qty of windows, Qty of doors, Qty of corners, Stud spacing (on center)
Outputs: Studs required

LINEAR COST ESTIMATOR

Inputs: Single panel length, Qty of panels, Cost per linear foot, Cost per linear meter
Outputs: Total cost, Total length

PAINT
Inputs: Wall length, Wall height, Number of coats, Surface type
Outputs: Gallons required, Liters required

RAFTER
Inputs: Run, Pitch (/12")
Outputs: Rafter length

RISE/RUN/ANGLE
Inputs: Rise, Run, Angle (Enter rise and either run or angle)
Outputs: Angle, slope, Run

ROOFING

Inputs: Width, Length, Pitch, Sq ft or M per pack, Type, Nails, Safety margin
Outputs: Roof surface area, Packs needed, Nails

SQ COST ESTIMATOR

Inputs: Width, Length, Cost per Sq ft or M
Outputs: Total cost, Total area, Total area (acres)

Version History May 30, 2026

• Updated the Site Calc Pro preview with a direct store link now that the app is available 7.31 May 30 New side menu for quicker navigation.
New feedback page for comments and support.
New Site Calc Pro preview with direct store link. 7.30 May 10 8th February 26

* Updated floor joist calculator 7.29 Feb 9 19th Jan 26

* Removed trigonometry section
* Fixed various screen issues 7.28 Jan 19 * Various trigonometry improvements
* Numerous images updated
* Another attempt at fixing back button issue 7.22 Jan 6 24th Dec 2025

* Added trigonometry section with 5 3D visualizations - 'Find hypotenuse', 'Find opposite', 'Find adjacent', 'Find Angle' and 'Pythagoras'
* Updated 24 menu images
* Added angle calculator to conversions
* Improved page transition speed when not animating
* Increased brightness
* Fixed sound click issue 7.2 12/24/2025 * Updates for iPhone 17

* Improved lighting setup 7.01 10/13/2025 18th July 2024
* Improved startup speed
* Update support and privacy URL's 6.98 07/18/2024 * Compatibility updates for iPhone 15, iPhone 15 Plus, iPhone 15 Pro and iPhone 15 Pro Max
* Faster startup speed
* Re-introduced fade effect behind menus and numberpad 6.97 03/28/2024 * Compatibility updates for iPhone 15, iPhone 15 Plus, iPhone 15 Pro and iPhone 15 Pro Max
* Faster startup speed
* Re-introduced fade effect behind menus and numberpad 6.96 03/27/2024 * Compatibility updates for iPhone 15, iPhone 15 Plus, iPhone 15 Pro and iPhone 15 Pro Max
* Faster startup speed
* Re-introduced fade effect behind menus and numberpad 6.95 03/01/2024 * Faster startup.
* Removed the fade effect behind the numberpad and menu options as it may cause eye strain.
* Added EU consent form for adverts
* Removed full screen adverts 6.86 06/18/2023 The app has been migrated to a freemium model, bringing it in-line with modern standards, meaning it is now free and supported by adverts.
There is an option at the top of the home menu to unlock the pro version, which removes advertising.
Current pro purchasers will have the new pro version automatically unlocked.
If there are any problems with unlocking, please go to 'Settings > Restore > Paid version'.
If there are any issues please contact appupdates@lightraystudio.com.
This update provides further UI improvements for tablets and improved startup speed.

Thanks. 6.8 02/02/2022 The app has been migrated to a freemium model, bringing it in-line with modern standards, meaning it is now free and supported by adverts.

There is an option at the top of the home menu to unlock the pro version, which removes advertising.

Current pro purchasers will have the new pro version automatically unlocked.

If there are any problems with unlocking, please go to 'Settings > Restore > Paid version'.

If there are any issues please contact appupdates@lightraystudio.com.

Thanks. 6.70 01/24/2022 * Added Canadian and European rebar sizes
* Added 'Premix Bags From Volume' concrete calculator
* Added improved Volume and Weight input (affects 'Concrete Mix Ratio' and 'Slump of Concrete')
* Added better handling of decimal points in Volume and Weight outputs 6.31 04/17/2020 Minor internal fixes. 6.11 08/21/2018 6.09 08/01/2018