Potency Factor Calculator
Same-effect single-substance potency normalized to an independently established reference dose, not risk-slope inference or arbitrary TEFassignment. Actual independently matched quantities/units required; not infer causal effect, clinical guidance or safe design.
Description
A same-effect potency factor compares a reference endpoint dose with the test-substance dose at that effect.
A same-effect potency factor compares a reference endpoint dose with the test-substance dose at that effect.1
Matching endpoint definitions and dose units is necessary before division.
When to use Potency Factor Calculator
Use this tool to calculate or review the supplied observations under the stated rules. Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
How to use Potency Factor Calculator and understand its results
- Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
- Enter callerIndependentlyEstablishedReferenceEndpointDose, matchedTestSubstanceEndpointDose, using the field meanings and rules below, then run the tool.
- Read result.observedRatio. Use the units and subtraction order below to interpret each value; retain negative differences where returned.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| callerIndependentlyEstablishedReferenceEndpointDose | Caller independently established reference endpoint dose | number | Required |
| matchedTestSubstanceEndpointDose | Matched test substance endpoint dose | number | Required |
Require a finite nonnegative numerator and strictly positive denominator. Divide the supplied measurements without converting their units or clamping the result. The implementation does not enforce numerator≤denominator, so a ratio above one can be returned. Use independently compatible definitions and units.
observedRatio=numerator/denominator Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Qualified observed calculation or explicit reference | object |
| result.observedRatio | Declared numerator divided by matched denominator on the stated compatible basis; no upper-one clamp. | number |
{
"input": {
"callerIndependentlyEstablishedReferenceEndpointDose": 2,
"matchedTestSubstanceEndpointDose": 4
},
"output": {
"result": {
"observedRatio": 0.5
}
}
}Limitations and assumptions
Chemical identity, route, assay, exposure basis and reference applicability are caller-established. The output supplies no causal conclusion, universal toxicity threshold or authoritative regulatory determination.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Toxicity Units Calculator: A toxic unit normalizes a measured concentration by a matched endpoint concentration. For a complementary comparison, use Toxic Units Mixture Calculator: Mixture toxic units can be summed under a declared concentration-addition model with compatible endpoints.
References
-
Potency Factor Calculator — tool.io
Similar or alternative tools
- Toxicity Units Calculator
A toxic unit normalizes a measured concentration by a matched endpoint concentration.
- Toxic Units Mixture Calculator
Mixture toxic units can be summed under a declared concentration-addition model with compatible endpoints.