Over 40,000 downloads! The only app of its kind in the App Store that accurately simulates an architectural and engineering scale to measure printed drawings.

Let Scala Architectural and Engineering Scale change the way you measure printed drawings on the go and at your desk. With fixed and variable scales there is no limit to measuring a printed drawing of any scale, even if the scale is unknown.

If you know the scale of a drawing, place your device on the drawing, scroll to the scale of the printed drawing and watch the chosen scale slide in.

If the scale of a drawing is unknown, slide your finger on the variable scale and match the scale of one known element, lock it and use it to measure all elements on that drawing.

Slide the measurement slider in fixed or variable scale modes, along the scale to see the desired measurement displayed.

Choose secondary units to be displayed while measuring, to quickly convert between metric, decimal feet and feet and inches.

Control the precision of the measurement units.

Scala Free Version includes:

Fixed Scales: Full Scale (12”=1’-0”), 6”=1’-0”, 3”=1’-0”, 1 1/2”=1’-0”, 1”=1’-0”, 3/4”=1’-0”
Variable Scale Range: Between full scale and 1/32”=1’-0”

Fixed Scales: 1”=10’, 1”=20’, 1”=30’, 1”=40’, 1”=50’ and 1”=60’
Variable Scale Range: Between 1”=10’ and 1”=300’

Fixed Scales: 1:1, 1:2, 1:5, 1:10, 1:20, 1:25
Variable Scale Range: Between 1:1 and 1:1000

Scala Full Version includes all scales above plus the following:

Fixed Scales: 1/2”=1’-0”, 3/8”=1’-0”, 1/4”=1’-0”, 3/16”=1’-0”, 1/8”=1’-0”, 3/32”=1’-0”, 1/16”=1’-0”, 1/32"=1'-0"

Fixed Scales: 1"=80', 1"=100', 1"=200', 1"=300'

Fixed Scales: 1:30, 1:40, 1:50, 1:75, 1:100, 1:125, 1:200, 1:250, 1:300, 1:400, 1:500, 1:1000


What’s New

Version 1.2.7

Updated app to work with Zoomed Display mode on all devices.

Ratings and Reviews

4.7 out of 5
18 Ratings

18 Ratings

mrafigh ,

Handy tool

The only thing I would like to see in this app is the ability to measure longer dimensions that the 5-1/2” lengths of the iPhone. I was trying to add some measurements and was hoping to be able to pull down the scale on the right side and get 6” or 7” but it seemed that the measurement stopped at 5.5”.

steve j - annapolis ,

Very Useful! Great App

As a civil engineer this is a very handy app. Working with arch and civil and mech scales is needed and when you forget one or need one surprised you're covered!

The variable scale feature in this app is invaluable!!

My wish list would include a full scale decimal inch readout. It's there but you need to read the numbers out of the display. Also a flip direction would help. Then two sliders to measure the delta and shift the 0 point would be helpful.

Mainely Watchdog ,

Dead On Accurate! Highly Recommended!

I use this with my iPad Pro and it is dead on accurate compared to my engineer’s scale. It’s great for making impromptu measurements in the field.

App Privacy

The developer, Noerah Alvi, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy.

Data Not Collected

The developer does not collect any data from this app.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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