Steady-State Concentration Calculator
Steady-State Concentration Calculator
Calculate average, maximum, and minimum drug concentrations at steady state during repeated dosing.
mg per dose
hours
L/hour
Fraction: 1 = 100%
L
1/hour
Steady-State Results
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Average Steady-State Concentration
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Maximum Steady-State Concentration
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Minimum Steady-State Concentration
—
Elimination Rate Constant
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Half-Life
—
Accumulation Ratio
Key equations:
Average steady-state concentration: Css,avg = F × Dose / (CL × τ)
Elimination rate constant: ke = CL / Vd
Half-life: t1/2 = 0.693 / ke
Accumulation ratio: R = 1 / (1 − e−keτ)
Average steady-state concentration: Css,avg = F × Dose / (CL × τ)
Elimination rate constant: ke = CL / Vd
Half-life: t1/2 = 0.693 / ke
Accumulation ratio: R = 1 / (1 − e−keτ)
Note:
This calculator assumes linear pharmacokinetics and repeated
dosing with a constant dosing interval. Peak and trough
concentrations are estimated using an immediate-release
bolus/instantaneous input model.