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Leather hide calculator

Leather is sold by area and specified by thickness in ounces, where one ounce is one sixty-fourth of an inch.

cm2
%

Hides are irregular, so 25 to 40% waste is normal.

oz
Leather to buy
7.56sq ft
= Exact Leather quantity
In square metres
0.702
Thickness
1.588
Thickness in inches
0.0625
Cost
68.01
Roughly this many side hides A side is typically about 22 square feet.
0.34
Area including waste
7020 cm2
Show the working
  1. Area per piece = 900
  2. Pieces needed = 6
  3. Cutting waste = 30
  4. Leather weight = 4
  5. Price per square foot = 9
  6. net_area_cm2 = 900 * 6 = 5400
  7. Area including waste = 5400 * (1 + 30/100) = 7020
  8. In square metres = 7020 / 10000 = 0.702
  9. Leather to buy = 0.702 * 10.763910416709722 = 7.556 27
  10. Thickness = 4 * 25.4 / 64 = 1.5875
  11. Thickness in inches = 4 / 64 = 0.0625
  12. Cost = 7.556 27 * 9 = 68.0064
  13. Roughly this many side hides = 7.556 27 / 22 = 0.343 467

Values are shown to six significant figures here; the arithmetic itself runs on exact fractions and is only rounded where a number is printed.

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    The formula

    • thickness in mm = ounces x 25.4 / 64
    • area = piece area x pieces x (1 + waste)

    One ounce of leather thickness is 1/64 inch, or 0.397 mm. A 4 to 5 oz leather is typical for belts and bags.

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