Free Protractor Downloads

Measure circular or polygonal areas on-screen

Screen Compass
 

Iconico
 

The Screen Compass allows you to measure the radius, circumference and area of circular or polygonal shapes on your screen simply and quickly. The Screen Compass floats above any other application so you can measure any angle on your screen.

radii screen calipers triangle square menu option pentagon radius

 
Psychrometric Chart and  Duct Calculator

Psychrometric + Duct Calculator
 

Yaode Yang
 

A convenient, precise and powerful tool for HVAC&R engineers. This psychrometric chart is perfectly consistent with all ASHRAE charts of No.1~7(SI Units) and No.1~5(IP Units). Full functional trial, free upgrade.

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Measure any angle on your screen

Screen Protractor Mac Edition
 

Iconico
 

The Screen Protractor allows you to easily and quickly measure any angle on the screen to the nearest Degree or Radian. This perfect compliment to the Screen Calipers, the Protractor is simple and easy to use with any program.

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Measure circular or polygonal areas on-screen

Screen Compass Mac Edition
 

Iconico
 

The Screen Compass allows you to measure the radius, circumference and area of circular or polygonal shapes on your screen simply and quickly. The perfect compliment to the Screen Calipers and Screen Protractor, the Compass is simple and easy to use.

calibrate triangle square compass intuitive user circumference pentagon

Accurately measure any angle on your screen.

Screen Protractor
 

Iconico
 

The Screen Protractor allows you to easily and quickly measure any angle on the screen to the nearest Degree or Radian. The Screen Protractor floats above any other application so you can measure any angle on your screen.

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On-screen electrocardiogram measurement.

Cardio Calipers
 

Iconico
 

The Cardio Calipers provide a fast and accurate way to measure electrocardiograms on a computer screen with pixel perfect accuracy. The Cardio Calipers are the perfect solution for EKG measurement, to measure Heart Rate, and any part of the complex.

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