How do you calculate boards per panel?

Divide the total candidate board images by the number of panels they came from, then multiply by usable yield. With 72 images across 12 panels at 96% yield: 72 / 12 = 6 candidate boards, x 96% = 5.76 effective boards per panel.

What is the difference between candidate and effective boards per panel?

Candidate boards per panel is the theoretical 'up' count — 6 in the example. Effective boards per panel applies fab yield (96%) to give 5.76, the number you can actually expect to ship and should use for costing.

Why apply a usable yield to boards per panel?

Bare-board fabrication never yields 100%. Etch defects, drill breakout, layer misregistration and electrical-test fails remove some images. A 96% yield means about 1 in 25 images is scrapped, dropping effective output from 6 to 5.76 per panel.

What is a good usable panel yield?

Mature, simple boards often run 95-99%; complex HDI or high-layer-count designs can fall to 85-92%. The 96% used here is typical for a moderate-complexity 4-to-6-layer board from an established fabricator.

How do boards per panel affect per-board cost?

Per-board fab cost is panel price divided by effective boards per panel. Going from 5.76 to 6.0 effective boards spreads the same panel cost over more units, directly lowering unit price — which is why yield improvement matters.

Can effective boards per panel be a fraction?

Yes — 5.76 is an average across many panels, not a single panel. Over a 12-panel run it means about 69 good boards total rather than the theoretical 72, reflecting expected yield loss.

Electronics Manufacturing calculator

Boards Per Panel Calculator

Boards per panel is the number of usable, sellable circuits you actually get from each fabrication panel after accounting for fab yield loss. It is the multiplier that converts a panel price into a per-board cost, so panelizers and procurement teams lean on it for every cost roll-up. The raw 'up' count on a panel is optimistic — micro-cracks, registration faults, and electrical-test failures mean some images never ship. By applying a usable-yield factor, this calculator gives the effective boards per panel that should drive your costing, not the theoretical maximum.

What this calculator does

Estimate effective boards per manufacturing panel after panel count basis and usable panel yield are applied.
a PCB estimator needs a board-per-panel assumption for quoting or supplier comparison
Computes candidate boards per panel from image and panel counts, then scales by usable yield to give effective good boards per panel.

Formula used

Candidate boards per panel = candidate board images ÷ production panels represented
Effective boards per panel = candidate boards per panel × usable panel yield

Inputs explained

Candidate board images:
Production panels represented:
Usable panel yield:

How to use the result

Use it when costing a fabrication order, comparing array options, or setting realistic shippable-quantity expectations from a panel run.
Yield here is a single flat percentage — it does not model defect clustering, panel-position-dependent yield, or scrap from assembly (only bare-board fab yield).

Current U.S. benchmarks

The producer price index for copper and brass mill shapes stands at 559.593 (BLS, May 2026), up 76.8% from a year earlier. Quotes priced off last quarter's material cost miss this move. Global copper trades at $13,484 per tonne (IMF via FRED, May 2026).
The U.S. has 11,261 computer and electronic products establishments employing about 815,443 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate boards per panel? Divide the total candidate board images by the number of panels they came from, then multiply by usable yield. With 72 images across 12 panels at 96% yield: 72 / 12 = 6 candidate boards, x 96% = 5.76 effective boards per panel.
What is the difference between candidate and effective boards per panel? Candidate boards per panel is the theoretical 'up' count — 6 in the example. Effective boards per panel applies fab yield (96%) to give 5.76, the number you can actually expect to ship and should use for costing.
Why apply a usable yield to boards per panel? Bare-board fabrication never yields 100%. Etch defects, drill breakout, layer misregistration and electrical-test fails remove some images. A 96% yield means about 1 in 25 images is scrapped, dropping effective output from 6 to 5.76 per panel.
What is a good usable panel yield? Mature, simple boards often run 95-99%; complex HDI or high-layer-count designs can fall to 85-92%. The 96% used here is typical for a moderate-complexity 4-to-6-layer board from an established fabricator.
How do boards per panel affect per-board cost? Per-board fab cost is panel price divided by effective boards per panel. Going from 5.76 to 6.0 effective boards spreads the same panel cost over more units, directly lowering unit price — which is why yield improvement matters.

Last reviewed 2026-05-12.