Sheet 06
EDDM bundle calculator
Each route gets its own bundles of 50 to 100 pieces, no taller than 6 inches. Enter a route's count from the EDDM tool and the calculator gives the most even split.
| Sheet | 06 of 08 |
|---|---|
| Checked | 2026-11-07 |
| Basis | USPS Notice 123 · DMM |
How it splits
The calculator uses the fewest bundles that keep every bundle at 100 pieces or fewer, then spreads the pieces evenly. Even bundles are easier to count and strap, and none of them falls under 50.
For example, 437 pieces becomes 5 bundles: three of 87 and two of 88. Filling bundles to 100 would give four of 100 and a fifth of 37, and that fifth bundle breaks the 50-piece minimum.
This is our arithmetic. USPS sets the 50 to 100 range and the 6-inch height. It doesn't tell you how to divide a route.
When thickness matters
A stack of 100 pieces has to stay under 6 inches. Thin postcards never come close. Thick folded pieces and booklets can.
| Piece thickness | Most pieces in 6 inches |
|---|---|
| 0.01 in (heavy postcard) | 600, so the 100 cap applies |
| 0.05 in | 120 |
| 0.08 in | 75 |
| 0.12 in | 50 |
| Over 0.12 in | Fewer than 50, so no legal bundle |
Measure a stack of 10 printed pieces and divide by 10 for an accurate thickness.
Routes under 50 pieces
A few routes have fewer than 50 addresses. The 50-piece minimum can't be met. Ask the Post Office that serves the route how it wants them prepared before you print.
References
Checked November 7, 2026. USPS changes prices and rules. The official sources win if they differ from this page.