C2C Blanket Calculator: Tiles, Rows & Yarn

Corner to corner (C2C) blanket planner: how many tiles across and down for any blanket size, which rows increase and decrease, and how much yarn you need.

New to this? Read the guide, with an example

Blanket size

Width ()

Length ()

One tile measures ()

Make a 10 × 10 tile swatch and divide its width by 10. Worsted with a 5 mm hook is about 1 in.

Yarn weight

your C2C blanket

About yd of yarn

Make a picture chart from a photo

Your rows

Rows 1–: increase on both sides (1 tile more each row), up to tiles.
Rows –: increase on one side and decrease on the other, so the long side keeps growing while the short side stays straight.
Rows –: decrease on both sides down to the last tile.

C2C blanket size chart

Tiles for each blanket size with 1-inch tiles (worsted yarn, 5 mm hook). Bigger or smaller tiles? Use the calculator above.

C2C tiles across and down for each blanket size
Blanket	Size (in)	Tiles across × down	Total tiles	Rows
Lovey	12 × 12	12 × 12	144	23
Baby	30 × 36	30 × 36	1,080	65
Toddler / crib	42 × 52	42 × 52	2,184	93
Throw	50 × 60	50 × 60	3,000	109
Twin	66 × 90	66 × 90	5,940	155
Full / double	80 × 90	80 × 90	7,200	169
Queen	90 × 100	90 × 100	9,000	189
King	108 × 100	108 × 100	10,800	207

How corner to corner (C2C) works

C2C is worked in little tiles of three double crochet (US) on a chain-3, starting from one corner and growing diagonally. Each row adds a tile on both sides until the blanket is as wide as you want; then you decrease on one side (for a rectangle) and finally on both, to finish at the opposite corner.

Square or rectangle

A square has as many increase rows as decrease rows. A rectangle adds a middle section where one side increases and the other decreases, which is what the “Your rows” list shows for your size.

Picture blankets

Each tile is one square of a chart, so C2C is perfect for pictures and lettering. Turn your own photo into a chart with the photo to C2C pattern maker.