1. What is Pattern Size Calculation?

Pattern size calculation determines the final dimensions of a sewing pattern by adding ease allowance to body measurements. This ensures comfortable movement and proper fit in the finished garment.

2. How Does the Calculator Work?

The calculator uses the simple formula:

Where:

• Measurement — Actual body measurement in millimeters
• Ease Allowance — Additional space needed for movement and style

Explanation: The formula combines your exact body measurements with the necessary ease to create a properly fitting pattern.

3. Importance of Ease Allowance

Details: Ease allowance varies by garment type (e.g., fitted vs. loose styles) and fabric characteristics. Proper ease ensures comfort and movement while maintaining the intended design silhouette.

4. Using the Calculator

Tips: Take accurate body measurements in mm. Research appropriate ease allowances for your specific project (typically 10-50mm for woven fabrics, negative ease for knits).

5. Frequently Asked Questions (FAQ)

Q1: How do I take accurate measurements?
A: Use a flexible measuring tape, measure over undergarments, keep tape parallel to floor, and don't pull too tight.

Q2: What's a typical ease allowance?
A: Varies by garment: 10-20mm for fitted, 20-40mm for semi-fitted, 40mm+ for loose styles. Always check pattern instructions.

Q3: Should I use mm or inches?
A: This calculator uses mm for precision, but you can convert inches to mm (1 inch = 25.4mm) if needed.

Q4: Does ease vary by fabric type?
A: Yes. Woven fabrics need positive ease, stretch knits may use negative ease (pattern smaller than body).

Q5: How do I adjust for different pattern pieces?
A: Apply different ease to different areas (e.g., more ease in bust/hips, less at waist). Create a personal ease chart.