Amigurumi Shape Generator

Generate round-by-round patterns instantly






GENERATED PATTERN

How the Shape Generator Works

Every amigurumi shape starts with a magic ring (MR) and builds outward using a defined increase pattern. This generator converts a target diameter and gauge into a complete, row-by-row crochet pattern using US single crochet (sc) terminology.

The Core Formula

Given a gauge of G stitches per 10 cm and a target diameter of D cm, the maximum stitch count at the widest round is:

Max stitches = round( (D × G / 10) × π ) / 6 × 6

This is snapped to the nearest multiple of 6 so that increases distribute evenly. Each increase round adds 6 stitches (one inc per 6-stitch section). The generator staggers increases for a smoother, rounder shape — a technique used by professional amigurumi designers.

Yardage Estimate

Yardage is estimated at 0.55 m of worsted-weight yarn per 10 stitches (a standard rule of thumb for tight amigurumi tension). Actual usage varies with yarn thickness, tension, and stuffing tightness. Always add 10–15% buffer.

Worked Example — 8 cm Sphere at Worsted Gauge (24 sc/10 cm)

Max stitches ≈ (8 × 24 / 10) × π ÷ 6 × 6 ≈ 60. Increase phase: R1 6, R2 12, R3 18 … R10 60. Even rows for sphere get straight rounds. Decrease phase mirrors it. Total ~20 rounds, ~55 cm height, ~30 m yarn.

Gauge (sc/10 cm) Hook (mm) Yarn Weight 8 cm Sphere Max Sts
14 5.0 Bulky 36
18 4.0 Aran/Worsted 48
24 3.5 Worsted 60
28 3.0 DK 72
36 2.5 Sport 90

FAQ

What is a magic ring (MR)?

A magic ring (also called a magic circle) is an adjustable loop start. You wrap yarn around your fingers, crochet your first round into the loop, then pull the tail to close the hole. It prevents the gap you get from a chain-4 start and is standard for all amigurumi shapes.

Why are stitches rounded to multiples of 6?

Starting with 6 sc in the magic ring and adding 6 stitches per increase round means every section contains the same number of stitches. This keeps the shape symmetrical and makes increases easy to place without counting errors.

What does “staggered increases” mean?

Instead of always placing the inc at position N within each 6-stitch repeat, the generator shifts the increase one stitch forward on alternate rounds. This breaks up the vertical ridge that forms when increases stack and produces a rounder, smoother surface.

Can I use this for a head with safety eyes?

Yes. For eye placement, close the head to about 60% of max stitches, add eyes, then continue decreasing. Use our Safety Eye Size Calculator to find the right eye diameter for your head size.

How accurate is the yardage estimate?

The 0.55 m per 10 sc estimate is calibrated for worsted weight at tight amigurumi tension (hook one or two sizes smaller than recommended). For bulky yarn use ~0.40 m/10 sc; for DK use ~0.48 m/10 sc. Add a 15% safety margin for colour changes and tails.

What’s the difference between an egg and a sphere?

An egg shape spreads the increase rounds over more rows before reaching maximum width, then decreases faster. This creates a taller profile — ideal for animal bodies, heads with a snout area, or Easter eggs. A sphere increases and decreases symmetrically.

Ready to Make Something Real?

Every SageandSilky pattern is written with this exact round math — numbered, tested, human-designed.

BROWSE THE COLLECTION

Explore all our free crochet tools.