Scarf Yarn Calculator

Yarn estimates for scarves, cowls and infinity scarves by style, with the usual dimensions prefilled.

A scarf is a small project with an outsized capacity for surprise, because the difference between a short decorative scarf and a long winter scarf is two or three skeins. This calculator prefills the standard scarf and cowl dimensions and estimates the yarn from your own gauge.

At a glance

What you enter: Width or circumference, Length or depth, Yarn weight, Your gauge: stitches per 4 in, Add a fringe, Safety margin
What you get: Total yarn needed, Skeins to buy
Formula shown: Yes, every step, right below your results.
Cost and privacy: Free, no account needed, and nothing you type is stored.

See worked examples ↓ Read the FAQ ↓ Share this calculator ↓

Width or circumference in

Length or depth in

Yarn weight

Your gauge: stitches per 4 in st

Add a fringe

Safety margin %

Reset

Results are estimates for general information only, always verify with a professional or official source before acting on them.

How to use the Scarf Yarn Calculator

1 Enter Width or circumference (in)
2 Enter Length or depth (in)
3 Enter Yarn weight
4 Enter Your gauge: stitches per 4 in (st)
5 Enter Add a fringe
6 Enter Safety margin (%)
7 Press Calculate. You get Total yarn needed, Skeins to buy, and every intermediate step stays visible under "How is this calculated?"
8 Change one number at a time to see what moves the result, that is usually the most useful thing a calculator can tell you.

Worked examples

Real numbers run through this calculator. Open any example to load it into the form above and change it.

Classic worsted scarf

An 8 by 65 inch scarf with no fringe.

You enter

Width or circumference: 8 in
Length or depth: 65 in
Yarn weight: 5
Your gauge: stitches per 4 in: 18 st
Add a fringe: No
Safety margin: 10%

You get

Total yarn needed: 429
Skeins to buy: 3

Two skeins of 200 yards is usually enough with a little to spare.

Open this example in the calculator →

Long cosy scarf with fringe

A 10 by 75 inch scarf in bulky weight with a fringe.

You enter

Width or circumference: 10 in
Length or depth: 75 in
Yarn weight: 6
Your gauge: stitches per 4 in: 14 st
Add a fringe: Yes
Safety margin: 10%

You get

Total yarn needed: 1,298
Skeins to buy: 10

Bulky yarn makes a warm scarf quickly but uses fewer skeins than you might expect.

Open this example in the calculator →

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Frequently asked questions

How much yarn do I need for a scarf?

A classic 8 by 65 inch scarf in worsted weight usually takes 400 to 500 yards, which is two to three standard skeins. A long winter scarf at 10 by 75 inches can take 600 yards or more. A lace weight scarf of the same size can take half that because the fabric is much finer.

How long should a scarf be?

For wearing under a coat, 65 to 70 inches is a good length for most adults, and 75 to 80 inches if you like to loop it. A scarf shorter than 55 inches tends to come untucked. If you are making it as a gift, err on the longer side because a long scarf can be wrapped and a short one cannot be stretched.

How much extra yarn does a fringe need?

Roughly ten percent of the body yardage for a medium fringe, and more if the fringe is long or dense. Each strand of fringe is twice the finished fringe length plus a little for the knot, so thirty strands of six inch fringe uses about ten yards.

Why do ribbed scarves use more yarn?

Ribbing pulls in horizontally, so the finished fabric is narrower than the same number of stitches in stockinette. To reach the same width you work more stitches, and more stitches means more yarn. A ribbed scarf can use a fifth more yarn than a plain one of the same size.