Peptides clear from the body following exponential decay. Given a half-life, this tool estimates how much of a starting amount remains after any elapsed time.
The model
Remaining = starting amount × 0.5 (time ÷ half-life)
Each half-life removes half of what is left: after one half-life 50% remains, after two 25%, after three 12.5%, and so on. This is a single-compartment approximation — real pharmacokinetics can involve absorption and multiple decay phases — so treat it as an educational estimate, not a clinical model.
| Half-lives elapsed | Remaining |
|---|---|
| 1 | 50% |
| 2 | 25% |
| 3 | 12.5% |
| 4 | 6.25% |
| 5 | 3.13% |