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 :
Measured 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
Measured Length and the actual full scale measurement into
Full Scale 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 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 Imperial 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 Imperial (inch) Fractions it's a bit more difficult to scale. Use this calculator to scale your Imperial dimensions with Fractions up and down.
Scale : 1Actual
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
How should we spell it?
Results
What do we think? - They're 2 different things:
A Meter is a device to measure things - like a Volt Meter or a Parking Meter
A Metre is about 3'-3~3/8"
Although diameter and perimeter as measurements - don't seem to fit very well
If the US ever goes Metric, you'll be able to use a Meter to measure Meters - A Meter Meter
All Imperial inputs and dimensions are actual physical finished sizes(unless otherwise noted)
All Metric Inputs in Millimetres(unless otherwise noted)