Knitting & crochet calculator
Blanket Cast-On Calculator
Choose a blanket size, enter your gauge, and get the cast-on stitches or starting chain count for a knit or crochet blanket.
Blanket sizing starts with width. Once you know the finished width and your stitch gauge, the cast-on is just width multiplied by stitches per inch. Row gauge can also estimate how many rows you will need to reach the finished length.
This calculator includes common blanket presets, including baby, crib, throw, twin, queen, and king sizes. You can also enter custom dimensions and add a stitch multiple if your blanket uses a repeat, border, ripple, cable, or lace pattern.
Worked example: a 50-inch throw blanket at 16 stitches per 4 inches has 4 stitches per inch. 50 x 4 = 200 stitches. At 24 rows per 4 inches, a 60-inch length takes about 360 rows.
Frequently Asked Questions
Is this for knitting or crochet blankets?
It works for both. For knitting, read the result as cast-on stitches. For crochet, read it as a starting chain estimate and adjust for any turning chains or pattern-specific chain multiple.
Should I add extra stitches for a border?
If your border is worked as part of the blanket, include those border stitches in the total width or use the stitch multiple fields. If the border is added afterward, calculate the center blanket first.
Why do blanket presets vary between patterns?
Blanket sizes are conventions, not exact standards. A throw, baby blanket, or crib blanket can vary by several inches depending on the pattern, fiber, and intended use.
Should I use row gauge for blanket length?
Use row gauge when you need a row estimate or when the pattern is row-count sensitive. If you plan to work until the blanket measures the right length, row gauge is helpful but not required.