Project & Yarn
Method
From a weighed swatch
Quick estimate
Project
Width (in)
Length (in)
Your swatch
Width (in)
Height (in)
Weight (grams)
Weigh the blocked swatch on a kitchen scale. Anything that reads to 1 g is accurate enough; 0.1 g is better.
Yarn weight
0 — Lace
1 — Super fine (fingering)
2 — Fine (sport)
3 — Light (DK)
4 — Medium (worsted, aran)
5 — Bulky (chunky)
6 — Super bulky
7 — Jumbo
Main stitch
Single crochet — dense
Half double crochet
Double crochet
Treble crochet
Granny / mesh — open
Denser stitches use dramatically more yarn for the same area. Single crochet can take half as much again as double.
Your yarn
Yards per skein
Grams per skein
Both numbers are on the ball band. Yardage matters more than weight when substituting yarn.
Safety margin
None — I like living dangerously
10% — same dye lot in hand
15% — recommended
25% — edging, fringe or colourwork
Yarn Needed
—
Result
Checks
Typical projects
Buying notes