How To Calculate Fitting Allowance

When you are sewing two pieces of fabric together, you need to leave a small space between the fabrics so that they can move around and not pucker. This space is called the fitting allowance. The fitting allowance is usually 1/4 inch, but you can adjust it depending on the type of fabric you are using.

How To Calculate Fitting Allowance

In clothing, a fitting allowance is an amount of fabric added to the garment measurements to allow for seams, darts, and other alterations. It is usually expressed as a percentage of the finished garment size. For example, if a pattern calls for a finished bust size of 36 inches and the seamstress adds 1 inch for a fitting allowance, the actual bust size of the garment will be 37 inches.

– Tape measure – Ruler or a straight edge – Pencil – Scissors

  • Determine the size of the garment you are fitting. 2.determine the size of the body you are fitting. 3.determine the amount of ease you want in the garment

on ‘fitting allowance’ -When calculating a fitting allowance, take into account the size of the garment piece, the type of fabric, and the amount of ease desired. -For a basic shirt, allow 1″ to 1 1/2″ ease on each side of the body. -For a fitted shirt, allow 3/4″ to 1″ ease on each side of the body. -For a flared skirt, allow 1″ to 2″ ease on each side


Frequently Asked Questions

How Much Thread Goes Into A Fitting?

Depending on the size and type of fitting, anywhere from a few inches to a foot or more of thread may be used.

What Is Fitting Allowance In Plumbing?

A plumbing fitting allowance is the space that is left between two pipes when they are joined together. This space is necessary so that the pipes can be connected and tightened without damaging them. The fitting allowance can vary depending on the type of connection that is being made.

How Do You Calculate Piping Fittings?

There is a variety of ways to calculate piping fittings. One common way is to use the Hazen-Williams equation. This equation takes into account the fluid’s flow rate, pipe diameter, and length to help determine the fittings needed.


In Summary

A fitting allowance is the amount of space that is left between the edge of the fabric and the edge of the pattern. This space allows for ease of movement when the garment is worn. To calculate a fitting allowance, measure the width of the fabric and subtract from it the width of the pattern.

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