Packing problems
423 circles in a unit square
Equal circles in a unit square; larger radius is better.
This arrangement
0.025428531
Common radius · 8 significant figures
0.00709% larger radius than the value listed on Packomania on 19 October 2026.
| Arrangement | Common radius |
|---|---|
| This arrangement | 0.025428531 |
| Packomania | 0.025426729 |
Difference: 1.8019868e-06 larger radius.
Compared with Packomania’s printed radius, which is rounded to 12 decimal places. The published coordinate file reports the same radius; its centres use a translated unit-square frame.