Leather Working Calculator
Calculate leather needed for projects: pattern pieces, waste factor. Leather thickness reference (oz to mm).
Pattern Pieces
Leather Weight / Thickness Reference
| Oz Weight | mm | Inches | Common Use |
|---|---|---|---|
| 1-2 oz | 0.4-0.8 | 1/64-1/32 | Linings, garments, book covers |
| 2-3 oz | 0.8-1.2 | 1/32-3/64 | Wallets, pouches, garments |
| 3-4 oz | 1.2-1.6 | 3/64-1/16 | Handbags, wallets, watch straps |
| 4-5 oz | 1.6-2.0 | 1/16-5/64 | Bags, cases, light tooling |
| 5-6 oz | 2.0-2.4 | 5/64-3/32 | Belts (dress), bags, sheaths |
| 7-8 oz | 2.8-3.2 | 7/64-1/8 | Holsters, heavy belts, tooling |
| 8-10 oz | 3.2-4.0 | 1/8-5/32 | Armor, heavy straps, saddlery |
| 10-14 oz | 4.0-5.6 | 5/32-7/32 | Sole leather, heavy armor |
More Math & Data tools at toool.cc