Panel Utilization Estimator
Calculate how many PCBs fit on a manufacturer panel and explore how small dimension changes shift the board count.
Inputs
Working Panel
Max board size 500×500 mm; 20 mm tooling strips top/bottom assumed. Check JLCPCB panelization guidelines for current limits.
Working panel dimensions (mm)
Clear border on all four sides (rails, fiducials).
placed on panel
Board / Sub-panel (product)
Enter the dimensions of what gets placed on the working panel — either a single PCB or a customer sub-panel (array) that itself contains multiple boards.
Dimensions (mm)
Gap between boards (mm)
Results
20
boards fit · 4 col × 5 row
Board utilization
75.7%
board area / panel area
Effective utilization
78.3%
grid footprint / panel area
Wasted area
515 cm²
panel − boards
Usable area
470 × 450 mm
after edge margin
Panel preview
Edge marginUsable areaBoardsWasted space
What-if sensitivity
±1–15 mm presets · custom rows accept any offsetgain loss baseline (0 mm)
Board width changes(current: 100 mm)
| Width change | Fit count | Δ boards | Utilization |
|---|---|---|---|
mm | enter Δmm offset | ||
| W -15 mm | 25 | +5 | 80.4% |
| W -10 mm | 25 | +5 | 85.1% |
| W -5 mm | 20 | — | 71.9% |
| W -3 mm | 20 | — | 73.4% |
| W -2 mm | 20 | — | 74.1% |
| W -1 mm | 20 | — | 74.9% |
| W 0 mm | 20 | — | 75.7% |
| W +1 mm | 20 | — | 76.4% |
| W +2 mm | 20 | — | 77.2% |
| W +3 mm | 20 | — | 77.9% |
| W +5 mm | 20 | — | 79.4% |
| W +10 mm | 20 | — | 83.2% |
| W +15 mm | 20 | — | 87.0% |
mm | enter Δmm offset | ||
Board height changes(current: 80 mm)
| Height change | Fit count | Δ boards | Utilization |
|---|---|---|---|
mm | enter Δmm offset | ||
| H -15 mm | 24 | +4 | 73.8% |
| H -10 mm | 24 | +4 | 79.4% |
| H -5 mm | 20 | — | 70.9% |
| H -3 mm | 20 | — | 72.8% |
| H -2 mm | 20 | — | 73.8% |
| H -1 mm | 20 | — | 74.7% |
| H 0 mm | 20 | — | 75.7% |
| H +1 mm | 20 | — | 76.6% |
| H +2 mm | 20 | — | 77.5% |
| H +3 mm | 20 | — | 78.5% |
| H +5 mm | 20 | — | 80.4% |
| H +10 mm | 16 | -4 | 68.1% |
| H +15 mm | 16 | -4 | 71.9% |
mm | enter Δmm offset | ||