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Ten tools

Calculators that do arithmetic on your numbers — and never invent a dose.

Every one of these takes numbers you already have and converts them. None of them decides anything for you. If a tool here ever appears to be recommending a quantity, it is a bug — report it.

Reconstitution Calculator

Vial strength, water added, and your dose. Out comes the exact mark to draw to.
mg
mL
mcg
—

Reverse Dose — units to micrograms

You already drew to a mark. This tells you what you actually just measured.
mg
mL
units
—

Water Planner — make the mark readable

Working out how much water to add so your dose lands on a big, easy-to-read number instead of 1.7 units.
mg
mcg
units
—

Half-Life, Accumulation & Washout

How much builds up with repeat dosing, when levels plateau, and how long clearance takes after stopping.
—

Vial Life & Cost per Dose

How many doses are in the vial, how long that lasts, what each dose costs, and whether it outlives the 28-day window.
mg
mcg
per wk
$
—

Dose by Body Weight

Papers report mcg/kg. Bodies come in pounds. This converts one into the other.
mcg/kg
—

Syringe & Volume Converter

Units, millilitres and microlitres across U-100, U-50 and U-40 syringes — the conversion people get wrong most often.
—

Reconstituted Vial Expiry

Bacteriostatic water buys roughly 28 days refrigerated. This counts them for you.
days
—

Two-Peptide Co-Draw

Drawing two compounds into one syringe. The arithmetic only — compatibility is a separate question, and usually an unanswered one.
mg
mL
mcg
mg
mL
mcg
—

Mass Unit Converter

Micrograms, milligrams, nanograms — and why IU cannot be converted here.
—
The one number that matters

Concentration is everything: mcg per unit = (vial mg × 1000) ÷ (mL of water × 100) on a U-100 syringe. Every tool on this page is a rearrangement of that. If you remember one thing, remember that adding more water does not change the dose — it changes how many marks that dose occupies, which is what makes it measurable.