Crochet Blanket Size Calculator: Yarn Estimates for Baby to King Size
Choose a preset blanket size or enter custom dimensions, pick your yarn weight, and the calculator returns the yardage needed, estimated skein count, and a recommended hook size — with a 15% buffer included.
Standard crochet blanket sizes range from 12×12 inch lovey to 110×108 inch king. Yarn requirements depend on size and weight: a 30×36 inch worsted baby blanket needs ~450 yards; a 90×100 inch worsted queen needs ~3,500 yards. The calculator below applies the right yardage-per-square-inch rate for your chosen yarn weight.
Standard crochet blanket sizes
| Type | Dimensions (in) | Worsted yards | Skeins (~220 yd) |
|---|---|---|---|
| Lovey | 12×12 | 60–90 | 1 |
| Cradle | 14×30 | 180–230 | 1–2 |
| Stroller | 30×36 | 340–430 | 2 |
| Baby | 30×40 | 380–470 | 2–3 |
| Toddler | 42×52 | 700–880 | 4 |
| Lap / Throw | 48×60 | 920–1,150 | 5 |
| Twin | 66×90 | 1,900–2,400 | 9–11 |
| Full / Double | 80×90 | 2,300–2,900 | 11–14 |
| Queen | 90×100 | 2,900–3,600 | 14–17 |
| King | 108×108 | 3,800–4,700 | 18–22 |
How yarn weight changes the maths
A blanket in DK weight (~0.10 yd/sq in for a typical hdc stitch) requires roughly 25% more yardage than the same blanket in worsted weight (~0.13 yd/sq in). Bulky weight cuts yardage by about 35% versus worsted. The calculator applies the per-yarn-weight rate automatically — but always add the 15% buffer for blankets specifically because their size makes dye-lot mismatches especially visible.
If you plan a 2–3 inch decorative border, add 10–15% to the yarn estimate. Borders use surprisingly more yarn than expected because they're often worked in a different (denser) stitch pattern.
Best stitch patterns for blankets, by yarn weight
- Worsted #4 — V-stitch, basketweave, ripple, granny stripe
- Bulky #5 — Single crochet, half-double, simple shells
- Super Bulky #6 — Single crochet, suzette stitch, simple ribbing
- DK #3 — Complex texture (cables, bobbles), lace patterns
Pro tips for blanket sizing decisions
- Size for the actual use. A "baby blanket" can mean lovey, receiving, or toddler size — three different sizes for three different uses.
- Add 8-12 inches of overhang for bed blankets. A queen mattress is 60×80; a queen-fit blanket is 76×96 minimum.
- Buy 15-20% more yarn than the calculator estimates. Large projects compound any tension drift or estimation error.
- Choose stitch patterns matched to yarn weight. Heavy textures in bulky weight produce uncomfortably stiff blankets.
- Block individual squares before joining. For granny-square blankets, blocking each square to identical dimensions prevents the lumpy appearance of mismatched squares.
Worked examples by yarn weight
Worsted baby blanket (30×40 in dc): ~700 yards needed; 4 skeins at 200 yards each.
DK throw (50×60 in granny stripe): ~1,700 yards; 8 skeins at 230 yards.
Bulky queen (90×100 in sc): ~2,500 yards; 20 skeins at 130 yards. Buy all from one dye lot — running out at 95% complete is irrecoverable.
Standard blanket sizes reference
The blanket size categories cover a wide range. Lovey (12×12 in), preemie (18×24 in), receiving baby (30×40 in), toddler (42×52 in), throw (50×60 in), twin (66×90 in), full/double (80×90 in), queen (90×100 in), king (108×108 in). Buy yarn based on the actual finished dimensions you choose, not the category name alone — the term "baby blanket" can broadly mean any one of several different finished sizes.
Direct answers.
What size should a baby blanket be?
Standard baby blanket sizes: receiving (30×40 in), stroller (30×36 in), and crib (42×52 in). Loveys (security blankets) are typically 12×12 in. The calculator above includes all standard presets.
How much yarn do I need for a throw blanket?
A 50×60 inch throw in worsted weight needs approximately 1,000–1,200 yards (5–6 skeins of 220-yard yarn). Bulkier yarns need less; DK and lighter need more. The calculator returns the exact figure for your chosen yarn weight.
What is the best yarn weight for blankets?
Worsted weight (#4) is the most popular for crochet blankets — fast enough to finish in reasonable time, soft enough to drape well. Bulky (#5) finishes faster but produces heavier, less drapey blankets. DK (#3) gives finer texture detail but takes longer. Match the weight to the use: bulky for warmth, DK for finesse.
How do I calculate yarn for a granny-square blanket?
Use the granny square calculator instead — it accounts for the per-square yardage and the joining method. Granny-square blankets use 10–15% more yarn than solid blankets of the same size because of joining and ends.
Should I add extra yarn for blanket borders?
Yes. A typical 2–3 inch border adds 10–15% to the total yardage. Borders worked in a denser stitch (e.g. crab stitch, picot edging) can add more. The calculator's 15% buffer accommodates a basic border; for elaborate ones, add another 10%.
Sources & further reading
- Craft Yarn Council — Standard Yarn Weight System
- Crochet Guild of America (CGOA) — professional standards
- Clara Parkes, The Knitter's Book of Yarn (Potter Craft) — fibre property reference
- Edie Eckman, The Crochet Answer Book (Storey) — technique reference