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Assay Calculator

Assay % = sample response ÷ standard response × potency (%)

Method / formulaAssay % = sample response ÷ standard response × potency (%)

Keep units consistent. Record assumptions and independently verify critical results.

INPUT DATA

Enter calculation values

Select the unit for each measurement. Compatible values are converted automatically before calculation.

CALCULATED RESULT—

The result updates as valid values are entered.

Unit handlingCompatible units are normalized internally. Confirm units, assumptions and significant figures before use.

CALCULATION GUIDE

Understand your calculation

Clear inputs, a practical example and the context you need to interpret your result.

How it works

Assay (%) = sample response ÷ standard response × standard potency (%). There is no additional factor of 100.

Inputs and units

Enter nonnegative sample response and potency and positive standard response. Use identical response units and enter 99.5 for 99.5% potency, not 0.995.

Worked example

980 ÷ 1000 × 99.5 = 97.510%.

Interpreting the result

The sample response corresponds to 97.51% on the assumed equal-concentration basis.

Assumptions and limitations

Only suitable when preparation concentrations and response factors match. Weights, dilutions, moisture, reference-standard corrections and calibration intercepts are not modeled. Use the approved analytical method.