4 tools: reconstitution, cost per mg, half-life and clearance, and unit conversion. All free, no signup, and they run in your browser so nothing you type is stored. Every one does arithmetic on numbers you supply. None recommends a dose.
How much water do I add, and how many units is that?
Peptide reconstitution calculator
Turn vial mg and bacteriostatic water ml into concentration and syringe units.
Open the calculatorWhich vial is actually cheaper?
Cost per mg comparator
Compare vials of different sizes on the only figure that makes them comparable.
Open the calculatorHow long does it stay in your system?
Half-life and clearance calculator
See the decay curve, time to effectively full clearance, and accumulation on repeat dosing.
Open the calculatorHow many mcg is that, and how many units?
Peptide unit converter
mg, mcg, ng, IU and insulin-syringe units, converted properly.
Open the calculatorMost peptide calculators ship with presets: a default dose, a typical protocol, a vendor price list. We do not, for one reason. Half-life figures for most research peptides come from animal models rather than human pharmacokinetic studies, and vial prices move constantly across sellers nobody regulates. Baking those numbers in would present them as settled when they are not, and would quietly go stale. You bring the figure from a primary source, we do the arithmetic on it, and the tool never has to be trusted for anything except the maths.
If you want to know how solid the evidence behind a given compound actually is, that is a different question and it has its own page: how we grade peptide evidence from A to F.
FAQ
Yes. All four are free, require no account, and run entirely in your browser. Nothing you type is sent to a server or stored.
No, and that is deliberate. Every tool here converts numbers you supply. None of them suggests a dose, a schedule, a compound, or a supplier. Most peptides are not FDA-approved and many have no legal supervised route, so a dosing recommendation from a website would be irresponsible regardless of how the math came out.
Draw bacteriostatic water into a syringe, inject it slowly down the inside wall of the vial rather than directly onto the powder, and swirl gently until dissolved. Never shake. The amount of water you add sets the concentration, so run the numbers before you mix: the same vial at 1 ml and at 3 ml gives three-fold different syringe readings for the same dose.
Because the underlying figures are not solid enough to present as fact. Half-lives for most research peptides come from animal models, and vial prices change constantly across unregulated sellers. Preloading them would imply a confidence the literature does not support and would go stale without anyone noticing. You bring the numbers from a primary source; we do the arithmetic.
The monthly peptide evidence brief.
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