BAG MAKING TOOL
Tote Bag Boxed Corner Calculator
Determine the exact square cutout dimensions needed to create a flat rectangular base with custom depth and volume.
Calculate Notch Size
Cut Corner Square Notch:
2.0 × 2.0 in
Finished Base Width:
12.0 in
Finished Bag Height:
13.0 in
Boxed Corner Field Manual
Cutting Instructions
- Corner Cutout Rule: Cut a square from both lower corners equal to half the desired depth ($Depth \div 2$) measured from the seam line.
- Seam Allowance Factor: If measuring from the raw fabric edge, add your standard seam allowance (e.g., 1/2") to the square cut.
The Math Formula
• Corner Notch Square = Base Depth ÷ 2
• Finished Base Width = Flat Width - Base Depth
• Finished Height = Flat Height - (Base Depth ÷ 2)
• Finished Base Width = Flat Width - Base Depth
• Finished Height = Flat Height - (Base Depth ÷ 2)