Absorption Fraction Calculator
Actual independently assessed absorbed/administered mass fraction, not oral AUCbioavailability or route toxicity. Actual independently matched quantities/units required; not infer causal effect, clinical guidance or safe design.
Description
An absorption fraction compares independently assessed absorbed mass with administered mass.
An absorption fraction compares independently assessed absorbed mass with administered mass.1
It is different from oral bioavailability assessed from a concentration-time model.
When to use Absorption Fraction 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 Absorption Fraction Calculator and understand its results
- Establish the chemical, exposure route, endpoint, measurement basis and independently applicable assay or assessment reference.
- Enter actualIndependentlyAssessedAbsorbedMass, actualAdministeredMass, 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 |
|---|---|---|---|
| actualIndependentlyAssessedAbsorbedMass | Actual independently assessed absorbed mass | number | Required |
| actualAdministeredMass | Actual administered mass | 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": {
"actualIndependentlyAssessedAbsorbedMass": 2,
"actualAdministeredMass": 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 Plasma Protein Binding Calculator: Plasma protein binding compares bound concentration with total concentration on the same sample basis. For a complementary comparison, use Tissue-Blood Partition Coefficient Calculator: Tissue-to-blood partition comparisons require compatible concentration bases and sampling context.
References
-
Absorption Fraction Calculator — tool.io
Similar or alternative tools
- Plasma Protein Binding Calculator
Plasma protein binding compares bound concentration with total concentration on the same sample basis.
- Tissue-Blood Partition Coefficient Calculator
Tissue-to-blood partition comparisons require compatible concentration bases and sampling context.