Yarn Stash Estimator

Why You Need a Yarn Stash Estimator

Every crafter accumulates partial skeins. They sit in bins, bags, and baskets — leftovers from finished projects, impulse purchases that lost their ball band, and skeins inherited from fellow crafters. The question is always the same: is there enough here for another project? Without a way to estimate the remaining yardage, those partial skeins stay in limbo — too much to throw away, too uncertain to use.

This estimator solves the mystery. Weigh your partial skein on a kitchen scale, enter the original skein specs, and get an immediate yardage estimate. For completely unlabeled yarn, the reference table maps yarn weight categories to typical yardage per 100 grams so you can estimate what you have even without a ball band.

What Is Yarn Stash Estimation?

Yarn stash estimation is the process of determining how much usable yardage remains in your leftover yarn. The most reliable method is weight-based: if you know the original skein's full weight and yardage, you can calculate the remaining yardage by weighing what you have and applying a simple proportion.

The formula is straightforward. If a full skein weighs 100 grams and contains 220 yards, and your partial skein weighs 40 grams, then you have approximately 88 yards remaining. This works because yarn density is consistent within a single skein — every gram contains the same amount of yardage.

For yarn with no label information at all, you can estimate yardage using the Craft Yarn Council's typical yardage ranges by weight category. A 100-gram ball of worsted weight yarn typically contains about 200 yards, while the same weight of lace yarn might contain 800 yards or more. These are averages — actual yardage varies by fiber content and spin — but they give you a useful ballpark for planning.

How the Stash Estimator Works

Mode 1 uses a direct proportion. Divide the partial skein weight by the full skein weight, then multiply by the full skein yardage. This gives you the estimated remaining yardage. The calculation assumes uniform density throughout the skein, which is true for commercially spun yarn.

Mode 2 uses reference values from the Craft Yarn Council's weight categories. Each category has a typical yardage per 100 grams — for example, worsted weight averages about 200 yards per 100 grams. Multiply the partial skein weight (in grams) by the yardage per gram for that category to get an estimate.

Both modes produce estimates, not exact measurements. Fiber content significantly affects the weight-to-yardage ratio. Cotton is denser than wool, so a 100-gram ball of cotton worsted contains fewer yards than a 100-gram ball of wool worsted. Silk and bamboo fall somewhere in between. The estimates are most accurate when the fiber content is consistent with typical values for the weight category.