How do you calculate reagent fill yield?

Divide good fills by total fills and multiply by 100. With 11,880 good fills out of 12,000, yield is 11,880 / 12,000 x 100 = 99.0%.

What is a good reagent fill yield?

Mature diagnostic fill lines commonly target 98-99.5%. The example's 99.0% is strong, though it still sits 0.5 points below a 98.5%... actually above target — read the gap to know where you stand.

What does a negative gap to target mean?

The gap is yield minus target. In the example, 99.0% against a 98.5% target gives +0.5; a negative gap would mean you're under target and losing more than planned.

How much scrap is a 1% yield drop?

On a 12,000-fill batch, each 1% is 120 fills. At reagent and labor cost per fill, even fractions of a percent add up fast across a year of production.

Should I count reworked fills as good?

No — count first-pass good fills for true yield. If you credit rework you mask the real process loss and overstate line capability.

Why use total attempted rather than total inspected?

Use whichever denominator matches your question. Attempted captures all process loss; inspected captures only what reached QC. Be consistent so trends stay comparable.

Clinical, Diagnostics & Lab Consumables Manufacturing calculator

Reagent Fill Yield Calculator

Reagent Fill Yield is the percentage of reagent fills that land within volume and quality tolerance out of every fill attempted or inspected. Fill-line operators, process engineers, and QA in diagnostics and lab-consumables manufacturing watch it because reagent is expensive, fill accuracy drives assay performance, and every reject is scrap plus rework. Tracking yield against a target turns a vague sense of how the line is running into a hard number you can trend, alarm on, and improve. A half-point miss on a high-volume line is thousands of wasted fills.

What this calculator does

Calculate reagent fill yield for vials, bottles, assay cartridges, strips, or reservoirs based on fills that meet volume, dispense accuracy, and visual quality requirements.
a diagnostics or lab consumables team needs to track fill-line performance, investigate dispense drift, or estimate usable reagent-filled units for lot release for a reagent fill lot
It divides good fills by total fills and multiplies by 100 to give a yield percentage, then subtracts your target to show the gap in percentage points.

Formula used

Reagent fill yield = fills within volume and quality tolerance ÷ total reagent fills attempted or inspected × 100
Gap to target yield = reagent fill yield - target reagent fill yield

Inputs explained

Fills within volume and quality tolerance:
Total reagent fills attempted or inspected:
Target reagent fill yield:

How to use the result

Use it for every fill batch or shift to monitor line health, validate a fill setup, or quantify scrap before and after a process change.
Yield alone doesn't tell you why fills failed — pair it with reject-category data (underfill, overfill, cosmetic, particulate) to drive root cause.

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 reagent fill yield? Divide good fills by total fills and multiply by 100. With 11,880 good fills out of 12,000, yield is 11,880 / 12,000 x 100 = 99.0%.
What is a good reagent fill yield? Mature diagnostic fill lines commonly target 98-99.5%. The example's 99.0% is strong, though it still sits 0.5 points below a 98.5%... actually above target — read the gap to know where you stand.
What does a negative gap to target mean? The gap is yield minus target. In the example, 99.0% against a 98.5% target gives +0.5; a negative gap would mean you're under target and losing more than planned.
How much scrap is a 1% yield drop? On a 12,000-fill batch, each 1% is 120 fills. At reagent and labor cost per fill, even fractions of a percent add up fast across a year of production.
Should I count reworked fills as good? No — count first-pass good fills for true yield. If you credit rework you mask the real process loss and overstate line capability.

Last reviewed 2026-05-12.