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Accurate Angle Measurement with Screen Protractor

The unique Screen Protractor allows you to easily and quickly measure any angle on the screen to the nearest Degree or Radian.

Our unique transparent Windows app floats above other software, allowing you to measure anything.

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Works with any software

Screen Protractor is designed to flat above any app, allowing you to measure anything you want

Measure literally anything

The Screen Protractor rotates through 360° allowing you to measure any angle

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Purchase with confidence

Download for free, and purchase the full featured version for just $29.50, we offer a risk free 30 day money back guarantee

Fingertip Accuracy and Simple to use

The Screen Protractor's unique design gives it the edge over other apps. By aligning the two guidelines using fingertip controls or nudging pixel by pixel with keyboard shortcuts you can ensure that the measurement you're getting is extremely accurate.

The Protractor can be used with any program as they float over other applications allowing quick and easy measurements. Read the full specs on how everything works.

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Unlock the full version
Find out all the professional features, including custom measurement units and transparency settings that are available after purchasing.
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Change Skins
Don't like the look of your Screen Protractor? It's simple to download new skins and change the UX, or even design your own skins.
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Log your measurements
It you have a lot to measure then use our free Measurement logger app to log every measurement you make and export to csv.

Calipers Protractor 4.0 now available, with semi transparent skins, and 360° rotation so you can measure anything on your screen.

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Discover the many uses of your Screen Protractor

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Web Designers
Measure pixel perfect HTML layouts in Chrome, Safari, Firefox or Edge
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Graphic Designers
Measure photos and illustrations in Adobe Photoshop, Canva or Illustrator
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Engineers
Perfect for CAD, measure blueprints, plans and architectural drawings
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Microscopy
Connect your microscope and measure magnified tiny things
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Medicine
Measure x-rays, scans or EKG, ECG printouts with ease
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Education
Teach Mathematics and Physics allow students to measure onscreen in degrees and radians

Change the UX with custom skins

The Protractor has a fully 'skinnable' interface. This means that you may download new skins and change the user interface. From aesthetic to technical you should find onscreen solution that suits your needs.

Pictured here the Numeric skin that comes with the program. The Numeric skin has a large semi-transparent base with additional numbers around the edge.
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Custom skins for unique measurement needs

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Make your own skins how-to guide

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Custom built skins available

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Cartography
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