A flat circle grows by the same count every round: six for sc, eight for hdc, twelve for dc. Enter your target size and gauge; you get the rounds, each one written out, and the point where your circle will start to ruffle or cup.
Your Circle
Work
11rounds
to a 6 in circle · final round 66 stitches
Round 11: [st 9, inc] × 6, 66 stitches, and the circle tapes 6 in.Stagger where each round’s first increase lands, or the increases print corners.
- Final circumference66 sts (18.8 in)
- Diameter per round0.55 in
- Rounds table belowrounds 1–11
The Formula
stitches in round n = base × n · base: sc 6, hdc 8, dc 12rounds for a diameter = (π × diameter × stitches per inch) ÷ baseA circle stays flat when each round’s stitch count matches its growing circumference: π rules it. The base numbers work because one sc is about as tall as it is wide, an hdc half again taller, a dc twice: taller rounds need more new stitches to keep pace.
Worked Example
A 6 in sc circle at 14 stitches per 4 in (3.5 per inch):
- Final circumference: π × 6 × 3.5 ≈ 66 stitches → 66 ÷ 6 = 11 rounds.
- Round 1: 6 sc in a magic ring. Round 2: inc around (12). Round 3: [sc 1, inc] × 6 (18), and so on, one more plain stitch per round.
- Round 11 counts 66 stitches and the circle tapes 6 inches.
The Standard Circle, Written Out
| Round | Work | Stitches |
|---|---|---|
| 1 | 6 in a magic ring | 6 |
| 2 | inc in every stitch | 12 |
| 3 | [st 1, inc] × 6 | 18 |
| 4 | [st 2, inc] × 6 | 24 |
| 5 | [st 3, inc] × 6 | 30 |
| 6 | [st 4, inc] × 6 | 36 |
| 7 | [st 5, inc] × 6 | 42 |
| 8 | [st 6, inc] × 6 | 48 |
| 9 | [st 7, inc] × 6 | 54 |
| 10 | [st 8, inc] × 6 | 60 |
| 11 | [st 9, inc] × 6 | 66 |
Ovals and Trouble Signs
- Oval: chain the difference between length and width, then work a circle’s increases around both ends of the chain: a 10 × 6 in oval starts with a 4 in chain and uses the 6 in circle’s end counts.
- Ruffling means too many increases for your tension: work one plain round between increase rounds, or switch to the next-smaller base.
- Cupping means too few: add an extra increase round, or go up a base.
- The visible seam of stacked increases spirals away when you stagger each round’s first increase.
Assumptions and Defaults
- Starting round: 6, 8, or 12 in a magic ring, matching the base.
- Worked in a spiral; joined rounds follow the same counts with a slip stitch and starting chain.
- The base numbers suit average tension; your flat-or-not fabric outranks them.
Circle Questions, Answered
How many stitches do I increase per round in a crochet circle?
A flat crochet circle increases six stitches per round in sc, eight in hdc, and twelve in dc. Each round adds the same number of stitches, and the increases simply spread farther apart as the circle grows.
How many rounds does a crochet circle need to reach a given size?
The number of rounds equals π × diameter × your stitches per inch ÷ the base count, which comes to 11 rounds for the 6 in sc example. Enter your own gauge above, because tension can move the result by a round in either direction.
Why does my crochet circle look like a hexagon?
A crochet circle looks like a hexagon when the increases stack directly on top of each other each round, forming six corners. Start each round’s increases at a slightly different point, and the corners soften into a round curve.
How do I crochet a flat oval?
To crochet a flat oval, chain the difference between the length and the width, work sc down both sides of the chain, and place a half circle’s increases at each end. Each end follows half of this calculator’s circle at your width, so the oval stays flat as it grows.