Most people searching for a TB-500 dosage calculator already know their target dose. What they actually need is the syringe math, and those are two completely different problems. Yet almost every tool in this category pretends they are the same. The good ones do one job: take the numbers you already have and tell you exactly where to fill a syringe. Here are the six I keep coming back to, sorted by who they are actually built for.
For People Who Want to See the Math: FormBlends Peptide Calculator
Best for: Anyone who does not want to just trust a black-box number
The single most useful thing about FormBlends Peptide Calculator is that it shows its work. You get the full calculation on screen, not just the answer. That matters because the most dangerous TB-500 dosing error is a 1000x unit mix-up, confusing mg with mcg, and being able to check the intermediate steps is the only real safeguard against it.
You enter three things: vial size (in mg or mcg), BAC water added (mL), and your intended dose per injection. The tool outputs your concentration per mL, the exact units to draw on an insulin syringe, and total doses remaining in the vial. It also supports U-100, U-50, and U-40 syringes. Most tools assume U-100 only.
There is a visual syringe fill bar that shows where the plunger actually lands. Small detail. Prevents real mistakes.
One-tap presets cover TB-500 5 mg, BPC-157 5 mg and 10 mg, ipamorelin 10 mg, tesamorelin 2 mg, and a GLP-1 option at 50 mg. The web version requires no account. There is also a mobile app (iOS and Android) that adds dose logging and an injection-site rotation map, but the free web calculator is complete on its own.
For Covering Multiple Peptides in One Session: PeptideFox
Best for: Protocols involving three or more compounds at once
PeptideFox supports over 30 peptides in a single interface and actively optimizes the bacteriostatic water volume it recommends. That second part is underrated. Adding too much or too little BAC water changes the units you draw per dose, and if you are running TB-500 alongside BPC-157 and ipamorelin simultaneously, doing that math manually three times in a row is exactly when errors happen. The visual draw guide is clear enough to use on a phone in bad lighting.
For GLP-1 Peptides Alongside TB-500: MyPeptideMatch
Best for: People mixing healing peptides with semaglutide or tirzepatide
Free, no account, covers TB-500 and BPC-157 but also includes semaglutide and tirzepatide in the same calculator. That combination is uncommon. If your protocol involves a GLP-1 compound and a tissue repair peptide at the same time, having a single tool handle both means fewer browser tabs and less chance of pulling the wrong concentration into the wrong syringe.
For Telehealth Patients on Named Compounds: LeadWest Medical
Best for: People prescribed retatrutide, tesamorelin, or sermorelin through a clinic
LeadWest has a calculator built specifically around the peptides their clinic prescribes, including TB-500, BPC-157, ipamorelin, CJC-1295, tesamorelin, sermorelin, and GHK-Cu. The tool is straightforward. Because it is tied to an actual medical provider, the framing is slightly different from anonymous web calculators, which some people find reassuring and others find unnecessarily cautious. Worth knowing it exists.
For a Clean Minimal Interface: PeptideDeck
Best for: People who want inputs and outputs with no clutter
Three fields. Enter your vial size in mg, your BAC water volume in mL, and the dose you are targeting in mcg. PeptideDeck gives you the concentration and the draw volume in both mL and insulin units. Nothing else on the page. That simplicity is the feature. It does not do TB-500 specifically, but since reconstitution math is identical for any lyophilized peptide, it handles TB-500 exactly as well as anything it officially lists.
For BPC-157 and TB-500 Stacks on a Phone: Outliyr
Best for: Optimization-focused users who want peptide info alongside the calculator
Outliyr covers BPC-157, TB-500, ipamorelin, CJC-1295, tesamorelin, GHK-Cu, and the GLP-1 class. It sits inside a broader health and biohacking content site rather than being a standalone tool, so it is more useful if you want context alongside your syringe math. Not the fastest interface, but the compound coverage is solid and it works fine on mobile.
A Few Things True Across All of These
Adding more bacteriostatic water to a vial does not change how much TB-500 you are injecting. It only changes how many units you draw to get that dose. Every calculator here handles that correctly. A standard U-100 insulin syringe holds 1 mL and is marked in 100 units, so 10 units equals 0.1 mL. That relationship stays fixed regardless of what is in the vial.
The reconstitution math itself is not complicated. What gets people is the mg-to-mcg conversion. TB-500 is typically dosed between 2 mg and 5 mg per injection depending on protocol, while BPC-157 is usually dosed in the 250 to 500 mcg range. Those numbers look similar on paper but are 4 to 20 times apart. Any calculator that handles the conversion automatically and shows the unit output clearly is doing the essential work.
None of these tools prescribes a dose. They calculate a measurement. Your dose comes from a qualified provider.
Common Questions
Does it matter which calculator you use if the reconstitution math is the same for every lyophilized peptide?
It matters less for accuracy than for error prevention. All six tools here will give you the same number if you enter inputs correctly. The difference is how easy each one makes it to catch a mistake before you draw. FormBlends shows intermediate steps; PeptideFox flags BAC water volume problems. Those features are where the tools diverge.
If I am running TB-500 and a GLP-1 compound at the same time, do I need a calculator that lists both explicitly?
Not strictly, but it helps. MyPeptideMatch is the only tool here that handles semaglutide or tirzepatide alongside TB-500 in one session. Using a single calculator for both compounds reduces the chance of pulling the concentration from the wrong tab when you are switching between syringes quickly.
Does the LeadWest Medical calculator work if I am not a LeadWest patient?
The public-facing calculator page is accessible without a patient account, so you can use it for the math regardless of where your peptides come from. The framing reflects a clinical context, which changes some of the language on screen, but the underlying reconstitution calculation is the same as any other tool listed here.
Can FormBlends handle a TB-500 vial reconstituted with a non-standard BAC water volume, say 1.5 mL instead of 2 mL?
Yes. The BAC water field accepts any volume you actually used, not just round numbers. That matters because people sometimes add water in stages or miscalculate slightly during reconstitution. Entering the real volume rather than the intended volume is the only way to get an accurate draw figure, and FormBlends does not lock you into presets for that field.
Is PeptideDeck reliable for TB-500 even though it does not list TB-500 by name?
The math does not change based on what is in the vial. Lyophilized peptides all reconstitute the same way: mass divided by volume gives concentration, and target dose divided by concentration gives draw volume. PeptideDeck does that calculation correctly. The absence of a named TB-500 preset is a UI choice, not a functional limitation.
Sources
- U-100 insulin syringe volume standards: FDA labeling conventions for insulin delivery devices
- TB-500 and BPC-157 common dosing ranges: peptides.org dosing reference charts
- PeptideFox compound list and BAC water optimization: peptidefox.com (public tool, verified 2025)
- MyPeptideMatch compound coverage: mypeptidematch.com (public tool, verified 2025)
- LeadWest Medical calculator compound list: leadwestmedical.com (public page, verified 2025)
- PeptideDeck interface and inputs: peptideckapp.com (public tool, verified 2025)
- Outliyr peptide calculator compound list: outliyr.com (public tool, verified 2025)
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