Calculators - Estimators - Template Generators - Plans & Tools
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(Easier to cut)
Radius
Check the 'Incs' checkbox to show entered incremets around circumference at current scale  

Printed Radius

Scale 1 :
Print and fold or cut protractor template in half, or cut half the inside out, leaving the centre point intact.

To match the scale of an arc or circle on a plan and measure around it, enter the full size radius of the arc and drag the Scale slider to re-size the template to the correct scale. At correct scale,the outside of the template will match the arc on the plan.

Print current Protractor to match a 2,000 radius marked on a plan at a scale of 1:20

Scale

Scale 1 :
Printed Outer Radius
Printed Inner Radius
Printed Circumference
Actual Radius
Actual Circumference



Check Incs checkbox to mark incremental points around the circumference. See tables below.

Arc Length per Degree at Radius - ( 1° = )








Slider Controls To fine tune Slider Controls click to select and use (cursor) keyboard keys.

Open new window containing only diagram images in current page ↓ This will better fit printed page. Printing to Scale Help
Print all diagrams on current page

Use your iPad or Android Tablet On-Site Your iPad, iPhone or Android Tablet or Phone is a valuable On-Site tool!
Lay your phone or tablet on an angled surface (roof ?) to directly measure angles and automatically calculate Roofing and Pitch Angle Apps.

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