How do you calculate diagnostic cartridge lot cost?

Multiply lot quantity by the cost per assembled cartridge and by the expected release yield to get variable cost, then add fixed setup and validation cost. For 25,000 cartridges at $2.85 each with 94% release and $18,500 fixed, that is 25,000 x 2.85 x 0.94 = $66,975 variable + $18,500 = $85,475 total.

What is the true cost per diagnostic cartridge?

Divide total lot cost by the cartridges actually carried through. In this example $85,475 across the lot works out to about $3.419 per cartridge — roughly 20% above the $2.85 bill-of-materials figure once yield loss and fixed overhead are loaded in.

Why is cost per cartridge higher than the per-unit assembly cost?

Two reasons: release yield below 100% means you pay to build cartridges that never ship, and fixed molding, fill, and validation costs are amortized over the lot. Together they lift the $2.85 BOM cost to $3.419 here.

How does release yield affect cartridge cost?

Yield scales the variable cost directly. Raising release from 94% to 98% on a 25,000 lot at $2.85 adds about $2,850 of variable spend but yields ~1,000 more sellable cartridges, usually lowering the cost per good unit despite the higher total.

What is a good release yield for diagnostic cartridges?

Mature IVD cartridge lines typically run 92-98% release after molding, reagent fill, and functional QC. New assays or microfluidic cartridges with tight tolerances often start in the high 80s and climb as the process is validated and capability stabilizes.

Should fixed validation cost be spread per lot or per year?

Per-lot allocation (as here) suits campaign manufacturing where each lot carries its own setup and release validation. If tooling and method validation are amortized across many lots, move those into an annual overhead pool and only charge per-lot setup to this field.

Clinical, Diagnostics & Lab Consumables Manufacturing calculator

Diagnostic Cartridge Cost Calculator

Diagnostic cartridge cost is the fully loaded cost of producing one lot of single-use assay cartridges — the injection-molded housing, filled reagents, assembled components, and the fixed tooling and validation overhead spread across the run. Process engineers, cost accountants, and operations managers at IVD and point-of-care manufacturers use it to quote per-test consumable pricing and to decide lot sizing. Because cartridges are sold by the box but billed against assay reimbursement, knowing the true cost per releasable unit — not per molded unit — is what protects margin. A lot that molds 25,000 but only releases 94% costs the same fixed dollars across far fewer sellable cartridges.

What this calculator does

Estimate total cost for diagnostic assay cartridges using cartridge count, cost per assembled cartridge, usable lot share, and fixed setup or validation cost.
a diagnostics or lab consumables team needs to quote cartridge production, compare design or supplier options, and understand lot-level cost drivers for a diagnostic cartridge lot
It computes the total cost of a diagnostic cartridge lot by combining the yield-weighted variable assembly cost with the fixed setup and validation overhead, then divides to show cost per cartridge actually produced.

Formula used

Variable diagnostic cartridge cost = diagnostic cartridges in the production lot × cost per assembled diagnostic cartridge × cartridges expected to pass release and packaging
Total diagnostic cartridge lot cost = variable diagnostic cartridge cost + fixed molding, reagent fill, assembly setup, and validation cost

Inputs explained

Diagnostic cartridges in the production lot:
Cost per assembled diagnostic cartridge:
Cartridges expected to pass release and packaging:
Fixed molding, reagent fill, assembly setup, and validation cost:

How to use the result

Use it when sizing a production lot, quoting per-cartridge or per-test consumable price, or comparing the cost impact of a yield improvement on a specific assay line.
It treats per-cartridge cost and release yield as flat averages; it does not model scrap recovery, reagent shelf-life write-offs, or step-specific yield losses across molding versus fill versus final assembly.

Current U.S. benchmarks

U.S. manufacturing runs at 75.6% of capacity with new factory orders at $657B per month (Federal Reserve and Census, May 2026).
The U.S. has 8,825 medical equipment and supplies establishments employing about 308,388 workers (Census County Business Patterns, 2023).

Common questions

How do you calculate diagnostic cartridge lot cost? Multiply lot quantity by the cost per assembled cartridge and by the expected release yield to get variable cost, then add fixed setup and validation cost. For 25,000 cartridges at $2.85 each with 94% release and $18,500 fixed, that is 25,000 x 2.85 x 0.94 = $66,975 variable + $18,500 = $85,475 total.
What is the true cost per diagnostic cartridge? Divide total lot cost by the cartridges actually carried through. In this example $85,475 across the lot works out to about $3.419 per cartridge — roughly 20% above the $2.85 bill-of-materials figure once yield loss and fixed overhead are loaded in.
Why is cost per cartridge higher than the per-unit assembly cost? Two reasons: release yield below 100% means you pay to build cartridges that never ship, and fixed molding, fill, and validation costs are amortized over the lot. Together they lift the $2.85 BOM cost to $3.419 here.
How does release yield affect cartridge cost? Yield scales the variable cost directly. Raising release from 94% to 98% on a 25,000 lot at $2.85 adds about $2,850 of variable spend but yields ~1,000 more sellable cartridges, usually lowering the cost per good unit despite the higher total.
What is a good release yield for diagnostic cartridges? Mature IVD cartridge lines typically run 92-98% release after molding, reagent fill, and functional QC. New assays or microfluidic cartridges with tight tolerances often start in the high 80s and climb as the process is validated and capability stabilizes.

Last reviewed 2026-05-12.