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Inch or
Metric
The main Navigation tabs at top of each page are Metric - inputs in millimeters (mm)
For Inch versions, directly under the main tab is a smaller 'Inch' tab for the Feet and Inch version.
Drop Down Menus have M for Metric Versions.
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Scale Calculator See also: Measure at Scale From Image and Printable Scale Rulers

Calculate Scale
Scaled Length
Actual Length



Precision



Take a measurement from plan or on-screen image and enter it and the actual length it represents to calculate the scale. For an on-screen image, measure the known dimension of an object in the image (eg: a wheel diameter).



Measure at Scale
Measured Length
Scale 1 :


Length
Measure at Scale From On-screen Image

Use a full scale ruler to measure a known measurement from an image on-screen. In the Calculate Scale dialog, enter this measurement into Scaled Length and the actual full scale measurement into Actual Length. Hit Calculate Scale to calculate the scale. Enter the scale into the lower Measure at Scale dialog. Now, measure any length from screen image or plan, enter into Measured Length and hit Calculate Length to calculate the actual full scale length.
Inch Fraction To Decimal Inch =

If scaling from an on-screen image, you can enlarge the image on the screen for more accurate measurements.
Hold down the CTRL key and hit + to enlarge, - to decrease size and 0 to re-set to 100% (normal).



Scaling Inch Fractions
If you're working at a small scale, and the calculators don't go small enough, you can scale up the measurements for the calculator inputs, then scale down the results. This is easy with Metric, where you can scale up by multiplying input dimensions by 10, enter into the calculator then scale the results back down by dividing by 10. With Inch Fractions it's a bit more difficult to scale. Use this calculator to scale your Inch dimensions with Fractions up and down.

Scale : 1 Actual

Scaled at Scale =

Try it out
From the image below, measure the front wheel rim diameter directly from your screen.
Measure from screen with sheet of paper It's easier to measure if you place a sheet of paper on the screen, mark the dimesion with a pen, then measure the dimension from the paper.
Assume the actual full size measurement of the rim is 18" or 457mm.
Enter the rim screen measurement into Scaled Length and the actual length (457) into Actual Length and hit Calculate Scale.
Hit Transfer Measure at Scale to transfer the scale to the lower Measure at Scale input dialog.
Now measure any dimension on the bike image and enter into Measured Length to calculate the actual full scale dimension.
If you're making a scale model, divide the full scale dimension by your model scale, to find dimensions for the parts on your model. (eg: 10:1)
See also: Measure at Scale From Image and Printable Scale Rulers
Size

If scaling from an on-screen image, you can enlarge the image on the screen for more accurate measurements.
Hold down the CTRL key and hit + to enlarge, - to decrease size and 0 to re-set to 100% (normal).



DON'T BREATH THE DUST If you're cutting blocks, concrete, stone or ANYTHING and there's DUST - DON'T TAKE THE RISK
Don't cut it, or cut it wet so there's NO DUST - Silicosis Sucks
And if you're cutting wet, wear a mask - theres dust in the spray mist too!

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Zoom out to fit large full scale template images on screen - or to adjust scale to match ruler held against screen
Zoom 100%

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Zoom to adjust screen scale to actual size (measure full scale diagram with ruler) and hit 'Set' to set scale on other pages.


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Click Slider to select then use keyboard cursor keys to fine tune.
Keyboard
Fine tune Sliders
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Create and Print Full Scale PDFs with diagrams on this page (templates)

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Check relevant local regulations for appropriate sizes, spacings and all engineering requirements.


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