Crochet Yarn Calculator

Free crochet yarn calculator: how many yards and skeins you need for any blanket or scarf, by project size, stitch (single crochet to granny), and yarn weight (sock to super bulky).

Quick answer

In worsted weight, a 30×36 inch baby blanket needs roughly 950–1,350 yards of yarn, a 48×60 throw about 2,300–3,600 yards, and a queen-size blanket 8,000+ — with tall, open stitches like double and treble crochet using 30–40% less than dense single crochet. Enter your size, stitch, and yarn weight and the calculator returns the exact yards and skeins to buy.

Project

Project preset

Width (inches)

Length (inches)

Units

Stitch

Yarn weight

Yards per skein (from the label)

You Need (±10% already included)

2,720

yards

2,487

meters

skeins of 200 yd

When in doubt, buy one extra skein per color now — while the dye lot still matches. Coming back for more months later is how an almost-finished blanket ends up two shades off.

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How to work out how much yarn a crochet blanket needs

Five steps from finished size to the number of skeins to put in the basket — including the 10% you should never skip.

Start from a project preset
Pick the closest preset — scarf, baby blanket, lapghan, throw, twin, queen or king — and the finished width and length fill in for you. Choosing your own numbers instead switches the dropdown to Custom automatically.
Set the finished size
Type the width and length you actually want, and use the units toggle to work in inches or centimetres. Enter the finished measurements, not the starting chain — the calculator works from the area of the fabric.
Choose your stitch
This is the setting people skip and then run out of yarn over. Taller stitches cover more ground per yard, so the same blanket in single crochet needs far more yarn than in treble. Pick the stitch you will work the whole piece in.
Choose the yarn weight, and correct the skein length
Set the weight number printed on the yarn label, from #1 fingering to #6 super bulky. Then check the yards-per-skein box: it defaults to a typical figure for that weight, so type in the real number from your label for an accurate skein count.
Read the total, and buy the extra skein
You get yards, metres and a skein count with a 10% safety margin already added. Buy any extra you might need in the same trip — matching a dye lot months later is the thing that ruins an otherwise finished blanket.

Why Stitch Choice Changes Everything

Two blankets of identical size can differ by a full bag of yarn purely on stitch choice. Dense stitches like single crochet pack more yarn into every square inch; tall, open stitches like double and treble crochet cover the same area with far less. The factors in this calculator are derived from published per-project yardage data — a 30×36 inch baby blanket takes about 1,242 yards in single crochet but only about 870 in double crochet — and every number on this page is computed from those same factors.

Worsted-weight yardage by stitch (margin included)

Stitch	Baby blanket 30×36″	Throw 48×60″
Single crochet	1,370 yd	3,640 yd
Moss / linen stitch	1,250 yd	3,330 yd
Shell stitch	1,160 yd	3,100 yd
Corner to corner (C2C)	1,130 yd	3,010 yd
Half double crochet	1,090 yd	2,910 yd
Granny stitch / squares	1,020 yd	2,720 yd
Ripple / chevron	1,010 yd	2,690 yd
Double crochet	960 yd	2,570 yd
V-stitch	930 yd	2,470 yd
Treble crochet	860 yd	2,280 yd

Computed by the calculator's own engine at average tension, +10% margin.

Skeins for Every Blanket Size

The quick-glance version for the most common question — granny stitch in worsted weight, standard ~200-yard skeins:

Crocheting it in squares rather than one piece? This page sizes the yarn; to work out how many granny squares to make a blanket in any of these sizes, the granny square blanket calculator turns a finished size and your own blocked square measurement into an exact grid and square count.

Granny-stitch blankets in worsted weight

Blanket	Yards	~200 yd skeins
Scarf (8″ × 60″)	450 yd	3
Baby blanket (30″ × 36″)	1,020 yd	6
Lapghan (36″ × 48″)	1,630 yd	9
Throw (48″ × 60″)	2,720 yd	14
Twin (66″ × 90″)	5,620 yd	29
Queen (90″ × 100″)	8,510 yd	43
King (108″ × 100″)	10,220 yd	52

Planning your squares instead? The granny square blanket calculator turns these sizes into exact square counts.

Buying Yarn Like a Pro

Three habits save projects: buy all skeins of a color at once so the dye lots match; keep the receipts — most yarn shops take back unopened skeins; and if the pattern is striped, divide the total by your color count and round each color up. For choosing the colors themselves, the granny square pattern generator previews whole-blanket combinations before you commit a single skein.

Frequently Asked Questions

How much yarn do I need for a crochet blanket?

In worsted weight: a 30×36 inch baby blanket runs roughly 950–1,350 yards depending on stitch, a 48×60 throw 2,300–3,600 yards, and a queen-size blanket 8,000+ yards. Stitch matters as much as size — the calculator prices your exact combination and converts it to skeins.

Which crochet stitch uses the least yarn?

Taller, airier stitches: treble and double crochet use the least (roughly 30–40% less than single crochet for the same blanket), V-stitch and ripple sit close behind, while dense single crochet and moss stitch are the hungriest. The comparison table below shows every stitch priced for the same two blankets.

How many skeins is that?

The calculator divides the yardage by your skein size and rounds up. Type the yards from your yarn label for an exact count — otherwise it assumes a typical skein for the weight (about 200 yd for a standard worsted skein, 130 yd for bulky).

Does yarn weight change how much I need?

Dramatically. Thicker yarn covers area faster: the same throw that needs ~2,700 yards in worsted takes only ~2,000 in bulky and ~1,500 in super bulky — but ~3,000 in DK. The estimates scale with the weight you pick.

What are the standard crochet blanket sizes?

Baby blanket 30×36″, lapghan 36×48″, throw 48×60″, twin 66×90″, queen 90×100″, king 108×100″ — the preset buttons use exactly these, and the size table below prices each one in granny stitch. Working in squares instead? The yardages double as a granny square yarn calculator (the table is computed in granny stitch), and the companion granny square blanket calculator turns any of these sizes into an exact square count.

How accurate are the estimates?

They are planning numbers with a 10% margin already built in, based on published yardage data at average tension. Your hook size, personal tension, and borders shift the real total — the golden rule stands: buy one extra skein per color while the dye lot still matches.

Crochet yarn calculator showing skeins and total yardage for a throw blanket in granny stitch — Project size, stitch, and yarn weight in — skeins to buy and total yardage out.