CALCULATE PROPORTIONs, Scale & Convert Units for Use
by "Arachnophilia"

Solving Proportions

 Enter the values from your proportion problem. Place an x in the box where the unknown goes.. A C = B D Check the set-up!

NOTES:
• Inputs: A=1 B=Scale (8th 16th 24ththetc), C=x and D=full size; 1:1 scale. if you are using a fraction of the original size then A=top number and B=bottm number, like 2/3, 3/5, 2/5. If the answrs has a decimal like n.nnnnnn, it's up to you to round off where you think best fits. 5 or greater rounds up to the next number; 3.4364nnnn rounds to 3.436, 3.4365nnnn rounds to 3.437, etc.
• MODEL RAILROAD SCALES & VALUES: O=1/48, OO=1/76 (UK), HO=1/87
• most collectible dinosaurs are 1/40 semi-scale (the tiny ones; and there were tiny dinosaurs, are usually quite larger than scale for useability purposes)
• Keep units consistent inches to inches, cm to cm, feet to feet, meters to meters, yards to yards, etc. If necessary, use our
• UNITS ABBRREVIATIONS: mm=milimetres, cm=centimetres, m=metres, km=kilometres, in=inches, ft=feet, yd=yards, mi=miles