Loopy PandaAmigurumi Ball Calculator
Enter the diameter you want and how many stitches you get in 5 cm, and the calculator writes out a single crochet ball round by round. It uses the sphere rule: for a widest round of 6 × k stitches, work k increase rounds, k plain rounds, then k − 1 decrease rounds. The widest round is about the diameter × 3.14 × your stitches per cm.
How to use the calculator
- Measure your stitchesCrochet a small flat circle or swatch in single crochet with your yarn and hook, and count the stitches across 5 cm.
- Enter the size you wantType the diameter of the finished ball in centimetres.
- Follow the roundsWork the rounds as listed. Stuff before the last two decrease rounds, while the opening is still wide.
- Check and adjustIf the ball comes out a little flat, add one more plain round. If it looks tall, work one fewer.
Sizes at a glance
These are for a tight single crochet of about 9 stitches in 5 cm, such as worsted yarn with a 3.5 mm hook. Your yarn, hook and hands change them.
| Widest stitches | Increase rounds | Plain rounds | Decrease rounds | Total rounds | About |
|---|---|---|---|---|---|
| 18 | 3 | 3 | 2 | 8 | 3 cm |
| 24 | 4 | 4 | 3 | 11 | 4 cm |
| 30 | 5 | 5 | 4 | 14 | 5.5 cm |
| 36 | 6 | 6 | 5 | 17 | 6.5 cm |
| 48 | 8 | 8 | 7 | 23 | 8.5 cm |
How the size is worked out
- Stitches at the widest round = diameter × 3.14 × stitches per cm, rounded to a multiple of 6.
- k = widest stitches ÷ 6.
- Total rounds = 3 × k − 1.
- Finished diameter ≈ widest stitches ÷ stitches per cm ÷ 3.14.
Chart symbols on this page
Frequently asked questions
How do I crochet a sphere of any size?
Increase 6 stitches per round until you reach the widest round you need, work about as many plain rounds as you had increase rounds, then decrease 6 per round back to 6. Stuff before the last two decrease rounds.
How many stitches should the widest round have?
Multiply the diameter you want by 3.14 and by your stitches per cm, then round to the nearest multiple of 6.
Why is my ball lumpy or a hexagon?
Lumps usually come from big pieces of stuffing. Corners come from increases stacked in the same place. The calculator moves the increases on alternate rounds to avoid this.
Can I make an egg shape?
Yes. Add extra plain rounds in the middle. The longer the middle, the taller the egg.
Tell me when new free patterns are out
We'll send you a short email when a new free pattern or tutorial goes up. No spam.
Thank you! You're on the list. We'll email you when a new free pattern is out.
Please enter a valid email address.
Please tick the box to agree to receive our emails.
Too many tries. Please wait a few minutes and try again.
Something went wrong. Please try again later.
New short videos every week, too, on YouTube