What it shows
The chart estimates how repeated dosing can build up over time, including peak, trough, current modeled amount and the accumulation factor.
Tools
Peptide Accumulation Calculator
Model peptide accumulation over repeated doses using dose amount, half-life, dosing interval and optional peptide shortcuts.
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Accumulation simulator
Enter a repeated dosing schedule to estimate peak, trough and steady-state accumulation over time.
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Useful inputs
Change half-life, dose interval and simulation length to compare daily, every-other-day and weekly schedules.
Search intent
Built for peptide half-life calculator, peptide accumulation calculator and steady-state peptide level searches.
How the model works
The curve uses a first-order elimination model. Each scheduled dose adds to the remaining amount from prior doses, then decays according to the half-life you enter. This is useful for comparing schedules, not for predicting an exact blood concentration. Read the peptide half-life guide for the peak, trough and steady-state context.
Half-life quick table
In a simple first-order model, each half-life reduces the modeled remaining amount by half.
| Time elapsed | Approx amount remaining |
|---|---|
| 1 half-life | 50% |
| 2 half-lives | 25% |
| 3 half-lives | 12.5% |
| 4 half-lives | 6.25% |
| 5 half-lives | 3.125% |
Peak, trough and steady state
Peak is the modeled high point after a dose is added.
Trough is the modeled low point before the next scheduled dose.
Steady state is when repeated peaks and troughs become more consistent over time. The calculator estimates this pattern; it does not replace pharmacokinetic data.
Accumulation calculator FAQ
What is peptide half-life?
Half-life is the time it takes for the modeled amount to fall by half. If a peptide has a 24 hour half-life, about half remains after 24 hours in a simple first-order model.
What does steady state mean?
Steady state is the repeated-dose pattern where peak and trough levels become more consistent. In simple first-order models, it usually takes about 4 to 5 half-lives to get close to steady state.
What is the difference between peak and trough?
Peak is the modeled amount soon after a dose is added. Trough is the modeled amount just before the next dose. Shorter intervals and longer half-lives usually raise troughs.
Does this predict blood concentration?
No. This is a simple accumulation model using dose amount, interval and half-life. It does not account for absorption, bioavailability, distribution, metabolism, active metabolites or patient differences.
Use with other peptide calculators
Pair accumulation estimates with reconstitution and unit conversion math when comparing repeated-dose schedules.
Peptide reconstitution calculatorCalculate concentration, draw volume and syringe units from vial strength and BAC water.Open toolPeptide unit converterConvert mg, mcg, optional IU and syringe units from one reconstituted vial setup.Open toolPeptide chemistry calculatorAnalyze sequence length, molecular weight, composition, charge, hydropathy and notation.Open tool
Research & educational purposes only
The information on PeptideStat is for educational and research purposes only and is not medical advice. Many peptides discussed are research compounds not approved for human use. Always consult a qualified healthcare professional before making any health decisions. Articles may contain affiliate links — we may earn a commission at no extra cost to you.