Calculators
Every tool runs in your browser. Nothing you enter is sent anywhere or stored, and results can be shared as a link because the values travel in the address, not in a database.
- How much do I draw? Reconstitution Vial size and bacteriostatic water to concentration, injection volume and syringe units.
- How much is in my system? Dose and half-life plotter Build a titration schedule and see peak, trough, steady state and washout.
- I am late. What now? Missed dose Take it now, skip it, or shift the schedule, plotted side by side.
- What does a dose really cost? Vial economics Cost per dose including the product stranded when a dose does not divide evenly.
- Is this vial still good? Storage and stability Expiry date, days remaining, and what time out of the fridge costs.
- When is it out of my system? Washout How long after the last injection until a compound has effectively cleared.
- I am switching off a pen. Pen to vial Convert a pen dose to syringe units, and match a vial to your pen concentration.
Where the numbers come from
Every constant and equation these tools use is published on the method page, including how each absorption rate was derived and where the model is weakest. If something there is wrong, it is wrong on every page at once, so corrections are welcome.