Free crochet & knitting calculators
Plan the project. Skip the maths.
Blanket sizes, yarn amounts, gauge and increases worked out from your own numbers, in inches or centimetres. No signup, nothing to download, and it all runs in your browser.
Calculators
What are you making?
- Blankets
Blanket size
Standard sizes from baby to king, with the stitches, rows and skeins to make one.
Baby to king · Skeins · Stitch count - Yarn
Yarn amount
Yards, metres and skeins for any project, from your swatch or a typical yardage.
Yards · Metres · Skeins - Stitches & gauge
Increase / decrease
Spread increases or decreases evenly across a row or round, written out stitch by stitch.
Rows · Rounds · Written out - Stitches & gauge
Gauge
Turn your swatch into stitches and rows for any width, or resize a pattern to your gauge.
Cast on · Starting chain · Resize - Design
C2C graph maker
Turn a photo into a corner to corner or pixel graph, with colour counts, in your browser.
Photo to grid · Colour counts · Print - Blankets
Granny squares
How many squares for the size you want, and the yarn for each colour.
Squares needed · Layout · Yarn - Garments
Hat size
Head circumference, hat height and crown size from preemie to adult.
Circumference · Height · Crown - Blankets
Temperature blanket
Daily temperatures for your city, a colour key and the skeins of each colour.
Your city · Colour key · Skeins - Garments
Sweater sizing
Body, yoke and sleeve numbers from your measurements and gauge.
Raglan · Yoke · Sleeves - Making
Pricing
Materials, hours and fees into a price you can charge.
Materials · Time · Fees - Making
Row counter
A big, tap-anywhere counter that remembers where you were.
Rows · Repeats · Saved
Reference charts
Sizes and weights, with the source
- Crochet hook size chart (US & mm) Every hook from 2.25 mm B-1 to 30 mm in millimetres and US letters.
- Knitting needle size chart (US, mm, UK) Needle sizes in millimetres, US numbers and old UK and Canadian numbers.
- Yarn weight chart and substitution guide The 0 to 7 weight system with UK and Australian ply names, gauge and tools.
How it works
Three steps. No signup.
- 01
Measure or swatch
Your size in inches or centimetres, and your own gauge when you have one. Every tool takes both units and answers in both.
- 02
Pick your yarn
Choose the yarn weight and skein size from the label, so the answer fits the yarn you are actually holding.
- 03
Get the plan
Stitches, rows and skeins to buy, with a little extra built in so you do not run out with three rows to go.