Exposure-Response Thresholds Calculator

Calculate exposures needed to achieve common effect thresholds based on simple or sigmoidal maximum effect (Emax) models. Enter EC 50/IC50, Emax/Imax, and the Hill coefficient (n) to compute thresholds from 10% through 99%, including 95%.

Exposure-Response Thresholds

Calculate exposures needed to achieve common effect thresholds based on simple or sigmoidal maximum effect (Emax) models.

Note: Calculations are based on the sigmoidal maximum effect model and report results for thresholds 10–90%, 95%, and 99%. Verify assumptions and units for your specific use case.

About the formulas

Calculations are based on the sigmoidal maximum effect (Emax) model:

Exposure = (Threshold / (100 − Threshold))1 / n × EC 50/IC50

Effect = Emax/Imax × (Threshold / 100)

Note: Verify assumptions and units for your specific use case.

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