Blanket Size Calculator

How to use

1. Choose a preset blanket size to fill in a typical width and length, or enter your own target dimensions directly.
2. Enter your stitch gauge: the stitch count and the width you measured it over, matching whichever unit (cm or in) you are working in.
3. Enter your row gauge the same way: the row count and the height you measured it over.
4. Read the result — the stitch count to cast on and the number of rows to work to reach your target width and length.

Good to know

• A blanket needs both a stitch gauge and a row gauge, unlike a simple width calculation, because the finished piece has to match a target length as well as a target width.
• The size presets are common reference dimensions, not a fixed standard — blanket sizing varies a lot by household and pattern, so treat them as a starting point and adjust to taste.
• Leave a small allowance for a border or edging and for blocking: many stitch patterns relax or draw in when blocked, so swatch, block it the same way you plan to block the finished blanket, and measure gauge after that step.

FAQ

Why does this calculator need a row gauge as well as a stitch gauge?

Width is controlled by stitch count and stitch gauge, but length is controlled separately by row count and row gauge. Without a row gauge, there is no way to know how many rows reach a given length.

Are the blanket size presets a real standard?

They are commonly used reference dimensions (crib, throw, twin and so on), not an official standard — actual blanket sizes vary between patterns and households, so use a preset as a starting point and measure your own target if you have one in mind.

Should I add extra stitches or rows for a border?

This calculator computes the stitches and rows for the body of the blanket at your target size. If your pattern adds a border or edging afterward, that is usually worked separately and does not need to be added to these counts.

Does this work for crochet blankets too?

Yes for row count — swatch in your crochet stitch, measure both gauges the same way, and the number of rows to reach your target length works identically to knitting. Foundation chain length is different, though: for stitches taller than single crochet you need a turn allowance on top of the stitch count (a double crochet foundation chain is typically stitch count + 2). See the turning chain chart for the allowance for your stitch.