GLP-1 and peptide dosage calculators
CalculatorMounjaro pen click calculatorSee how many clicks match your prescribed dose.CalculatorZepbound pen click calculatorThe same sum for a Zepbound KwikPen.CalculatorPeptide reconstitution and dosage calculatorVial amount, water and target dose into concentration, volume and syringe units.CalculatorReverse dose calculatorConvert syringe units back to milligrams.CalculatorSemaglutide dose in syringe unitsConvert mg and concentration into units.CalculatorTirzepatide dose in syringe unitsConvert mg and concentration into units.CalculatorSplit dose calculatorDivide a weekly dose into smaller injections.CalculatorVial transition calculatorKeep the dose when a vial has a different concentration.CalculatorRetatrutide amount calculatorConvert an amount in mg and a concentration into mL and syringe units.CalculatorZepbound vial units to mgConvert the units you drew back to milligrams.ChartMounjaro dose chartThe label's steps and how long it stays.ChartOzempic dose chartThe label's steps and how long it stays.ChartWegovy dose chartThe label's steps and how long it stays.ChartZepbound dose chartThe label's steps and how long it stays.
Planning and tracking tools
ToolDose plotterSee how doses build up and overlap over weeks.ToolTitration plannerPut the label's steps on your calendar.GuideMissed dose guideWhat the label says for a late injection.ToolWeight goal and trial resultsCompare your goal with the main trial averages.CalculatorCost per pound calculatorWhat you spend for each unit of weight lost.
Nutrition and wellness calculators
How each tool works
The arithmetic behind every calculator, with a worked example.
ExplainerCost per Pound Lost: How the Sum WorksDividing what you spent by what you lost, and why the answer moves.ExplainerDaily Fibre Target: Where the Number Comes FromGuidelines are written per age and sex, or per calorie. This page shows how to read one.ExplainerIdeal Weight Formulas: What They Are and Are NotFour old formulas and a BMI range, explained with their limits.ExplainerMissed Dose Guide: Reading the Label's WindowHow a missed-dose rule is built, and how to read yours.ExplainerMounjaro Dose Chart and How Long It StaysHow the Mounjaro dose steps are laid out, and how long tirzepatide stays in the body.ExplainerMounjaro Click Chart ExplainedHow click counting on a Mounjaro KwikPen pen works, the arithmetic behind it, and what to check on your own pen.ExplainerOzempic Dose Chart and How Long It StaysHow the Ozempic dose steps are laid out, and how long semaglutide stays in the body.ExplainerDose Plotter: How Levels Build and FallWhy a weekly injection looks like a wave, and how overlap builds a baseline.ExplainerPeptide Reconstitution: How the Math WorksHow vial amount, water volume and target dose become concentration and syringe units.ExplainerRetatrutide Amounts: Mg to Millilitres ExplainedThe same dose math used for any vial, applied to an amount of retatrutide.ExplainerReverse Dose Calculator Explained: Units to MilligramsWorking backwards from the units you drew to the milligrams you took, for a GLP-1 vial.ExplainerSemaglutide Dose to Syringe Units ExplainedHow a semaglutide dose becomes syringe units, and the other way round.ExplainerSplitting a Weekly Dose: How the Math WorksDividing one weekly amount into smaller, more frequent injections.ExplainerTirzepatide Dose to Syringe Units ExplainedHow a tirzepatide dose becomes syringe units, and the other way round.ExplainerTitration Planner: Laying a Dose Plan on a CalendarHow step-by-step escalation is turned into dates and syringe units.ExplainerSwitching Vials: Drawing One Dose from Two ConcentrationsWhat to do when the old vial runs out mid-dose and the new one is a different strength.ExplainerWegovy Dose Chart and How Long It StaysHow the Wegovy dose steps are laid out, and how long semaglutide stays in the body.ExplainerHow Trials Report Weight Change Over TimeA guide to reading average weight change over time in published GLP-1 trials, with every number left to be filled from the papers.ExplainerZepbound Dose Chart and How Long It StaysHow the Zepbound dose steps are laid out, and how long tirzepatide stays in the body.ExplainerZepbound Pen Clicks ExplainedHow click counting on a Zepbound pen pen works, the arithmetic behind it, and what to check on your own pen.ExplainerZepbound Vials: Converting Units to MilligramsWorking backwards from the units you drew to the milligrams you took, for tirzepatide vials.
These tools are educational and do not replace professional medical advice. Brand names belong to their owners; Reko is not affiliated with them.