Protocol Timing Tool
About this tool
A peptide calculator for units per dose, reconstitution and stack timing.
The Stack Calculator is a free peptide calculator that does the reconstitution math for you. Enter how much is in the vial, how much bacteriostatic water goes in, the amount being studied and the syringe type, and it works out the concentration, how many units to draw on the syringe and how many doses the vial holds. It also has a multi compound mode that lines several compounds up on one timeline, using simplified half-life models, so you can see where they overlap at the same receptor and how injection days change that. The calculator converts the numbers you enter. It does not suggest an amount, and it is built for people who want the math checked before they read further into the research.
How does the calculator work out units to draw?
It divides what is in the vial by the water added to get the concentration, meaning how much compound sits in each milliliter. Then it works out what volume holds the amount you entered and converts that volume to units on the syringe you picked. On a U-100 insulin syringe, 100 units is one milliliter, and on a U-40 syringe, 40 units is one milliliter, so the same volume reads as a different number of units on each.
What is reconstitution?
Many research peptides come as a freeze-dried powder, and reconstitution is adding bacteriostatic water to the vial so the powder becomes a liquid that can be measured. The amount of water changes how concentrated the liquid is, not how much compound is in the vial. More water means each unit on the syringe carries less, which is why the units to draw change when the water changes.
Is the Stack Calculator free?
Yes. The units calculator is free and asks for nothing. A single compound analysis, with its exposure curve and titration read, is free with an email. Running two or more compounds together, with the receptor overlap, conflict map, injection day timing and the 7-day schedule, is part of the Stack Calculator subscription, the Search and Calculator Bundle, or Full Access.
What does the multi compound analysis show?
For every pair of compounds that act on the same receptor, it draws how their levels rise and fall across the week and estimates how much of that time they overlap. It flags known conflicts and pairings, tests which injection days reduce the overlap, and builds a 7-day schedule. Save this research keeps the whole read in Your Research, where it opens and prints. The curves come from simplified half-life models meant for education, so real levels in a person can differ.
Can the calculator tell whether a protocol is working?
No. It handles the math and the timing, not the result. Research suggests bloodwork is one of the clearest ways to read what a compound is changing, and the free Bloodwork Diagnostic Tool builds a panel to take to a doctor based on your goals and symptoms.
For research and educational purposes only. Not medical advice.