Calculators & Tools
The Peptide Calculator, Reconstitution Calculator, Syringe Converter, and Dose Schedule Builder.
The calculator layer is the site's primary SEO moat. Every calculator has a visual syringe, a worked example, a printable cheat sheet, and a tested math library.
- Posts live
- 16
- Planned
- 30
Plain-English answers, step-numbered.
- Explainer6 min
Calculator results that look wrong and are not
Five calculator results that surprise people and are still right, plus the two that mean stop and recheck. Not medical advice.
- Explainer6 min
What each term on a vial label means
Lyophilized, LOT, EXP, USP, single-dose versus multiple-dose: what each term on a vial label means and which one sets your math.
- Explainer6 min
Turning a daily dose into a weekly figure
Multiplying a daily dose by seven is arithmetic, not a dosing decision. When a weekly total is useful and when it means nothing.
- Explainer6 min
Turning a titration plan into a calendar
A titration plan has a start dose, a step size, an interval, a target and a fallback. How to turn your prescriber's plan into dates.
- Explainer6 min
The dose-math mistakes that change the dose
Six arithmetic errors that quietly change an injected dose, and the check that catches each one. Educational only, not medical advice.
- Explainer6 min
How to check the math before you draw a dose
A six-step check that catches most dose-math errors before the needle goes in, including the reverse calculation. Not medical advice.
- Explainer6 min
Why bacteriostatic water volume changes your dose
The volume of bacteriostatic water you add sets the concentration, and concentration decides how many units a dose reads. Not medical advice.
- Explainer6 min
Concentration math for a multi-dose vial
Total milligrams divided by total millilitres gives a multi-dose vial's concentration, and that one number governs every dose. Not medical advice.
- Explainer6 min
Concentration math for a single-use vial
In a single-use vial the whole contents are one dose, so concentration is a check on your draw rather than a way to split it. Not medical advice.
- Explainer6 min
Dead space in syringes
Dead space is the liquid left in the hub and needle after the plunger bottoms out. What it costs per dose and how to keep it small.
- Explainer6 min
mg, mL, IU and units: what each one measures
mg is mass, mL is volume, IU is biological activity, a syringe unit is a volume mark. What each label means and how they relate. Not medical advice.
- Explainer6 min
Converting mcg doses to insulin-syringe units
Micrograms per unit is the one number to work out per vial: multiply mg per mL by ten, then divide your dose by it. Not medical advice.
- Explainer6 min
Rounding a calculated dose to a real tick mark
A syringe shows only the marks printed on it. How to round a calculated dose to a real tick, and when to change concentration instead.
- Explainer6 min
How accurate an insulin syringe really is
What limits an insulin syringe's accuracy: the graduation interval, how well you can read it, and dead space. Not medical advice.
- Explainer7 min
How to read an insulin syringe
How to read an insulin syringe: find your barrel size, learn what each line is worth, and line the plunger to the right unit. Step by step.
- Explainer6 min
Converting insulin-syringe units to milligrams
How insulin-syringe units convert to mg: units are a volume mark, not a dose, so the answer depends on your vial's concentration. Not medical advice.
Your First Injection, a one-page cheat sheet.
A printable, step-numbered PDF covering supplies, technique, site rotation, and the three questions to ask your prescriber. Free.
By subscribing, you agree to our Privacy Policy. One practical email per week. Unsubscribe anytime.