MedTech Manufacturing calculator
Sterilization Cost Per Unit Calculator
Sterilization cost per unit tells you how much it costs to render one finished medical device sterile, spreading the fixed and variable cost of an EtO, gamma, e-beam or steam cycle across the devices that actually pass sterility release. Process engineers, cost accountants and CapEx teams use it to compare in-house versus contract sterilization, to justify load-size changes, and to feed accurate COGS into device pricing. Because a single ethylene oxide cycle can run several thousand dollars whether it holds 600 devices or 2,400, the per-unit number is dominated by how full you pack the chamber and how many units survive release. Getting it right matters when a few cents per unit on a high-volume disposable decides whether a product line is profitable.
What this calculator does
- Allocate total sterilization batch cost (contract sterilizer, BI testing, transport) across released sterile units.
- Use this when building device COGS, comparing sterilization methods (EO vs. gamma vs. e-beam), or evaluating load configuration changes.
- It divides the total cost of a sterilization batch by the number of units released as sterile, then scales by an allocation factor for shared or multi-product loads.
Formula used
- Sterilization cost per unit ratio = total sterilization batch cost ÷ released sterile units
- Converted sterilization cost per unit ratio = ratio × multi-product allocation factor
Inputs explained
- Total sterilization batch cost:
- Released sterile units:
- Multi-product allocation factor:
How to use the result
- Use it when costing a sterilization cycle, comparing in-house versus contract sterilization quotes, or evaluating whether to increase load density.
- It assumes every released unit shares the batch cost equally and does not separately price reruns, re-sterilization, or units quarantined for parametric review.
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 sterilization cost per unit? Divide the total sterilization batch cost by the number of released sterile units, then multiply by an allocation factor. With a $4,800 batch cost over 2,400 released units and a factor of 1, the cost is $2.00 per unit.
- Why use released units instead of loaded units? Because units lost to sterility release failures or quarantine still absorb the batch cost. Costing against released units gives the true per-saleable-unit figure, which is always equal to or higher than cost per loaded unit.
- What is a good sterilization cost per unit? It depends entirely on device value and modality. For high-volume disposables, sub-$1 is common with gamma or e-beam; complex EtO loads for low-volume devices can run several dollars. The $2.00 in our example is typical for a moderately loaded EtO cycle.
- What does the multi-product allocation factor do? It scales the per-unit cost when a single load is shared across products or cost centers. A factor of 1 charges the full per-unit ratio to this product; a factor of 0.5 would assign half because another product shares the chamber.
- How can I lower sterilization cost per unit? Increase load density (more devices per cycle), improve release yield so fewer units are scrapped, and right-size cycles to your validated SAL. Doubling units per load from 1,200 to 2,400 halves the per-unit cost.
Last reviewed 2026-05-12.