MicrodosingCalculator.com is an educational arithmetic and exposure-modeling tool only. It may contain mistakes, incomplete assumptions, outdated information, calculation issues, display issues, or other undiscovered problems.
This site is not medical advice, dosing advice, prescribing guidance, compounding guidance, reconstitution guidance, injection guidance, pharmacy guidance, or a substitute for a licensed clinician or pharmacist.
Do not use this site to decide what medication, peptide, product, vial content, concentration, amount, volume, schedule, pen click count, route, or device action to use.
Some listed substances are investigational, unapproved, research-only, prescription-only, or not reviewed by FDA for safety, effectiveness, or quality for the modeled use.
You are solely responsible for verifying all information with a qualified professional and the official product materials before taking any real-world action.
To the fullest extent permitted by law, the site and its owners/operators are not responsible for any injury, loss, overdose, underdose, adverse event, treatment failure, device misuse, calculation error, reliance, or other harm connected to use of this site.
If accepted, this acknowledgement is stored only in this browser's local storage and will not be shown again unless browser data is cleared or the acknowledgement text is materially changed.
Model exposure, washout, hypothetical timing inputs, and supply estimates in one working view.
Educational model only. This site shows simplified half-life, accumulation, washout, supply, and device-arithmetic estimates from user-entered assumptions. Reported, research, trial-style, community, or placeholder examples are not recommendations. It is not medical advice, dosing advice, prescribing guidance, compounding guidance, reconstitution guidance, pharmacy guidance, or injection instruction. Real medication or peptide decisions must be made only with a licensed clinician or pharmacist and the official materials for the exact product.
Portable settings
Export or import a backup
Export creates a ZIP file containing one JSON backup. Importing that file in another browser restores calculator inputs, per-compound settings, reconstitution settings, chart display state, active view, theme, and saved acknowledgement state.
Included data
Exposure calculator field values, phase rows, vial-draw setup, chart toggles, zoom range, open sections, and per-compound saved settings.
Reconstitution calculator field values, blend components, tested content values, syringe scale, target basis, and open sections.
Current calculator view, light/dark theme, dismissed change marks, and local legal acknowledgement state.
// The charted total is the sum of all active contributions:
total(t) = Σᵢ contributionᵢ(t)
// After the last modeled event:
total(t) continues decaying by the selected half-life until the residual level stops materially changing the chart
Live arithmetic
Reconstitution math summary
Content used
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Concentration
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Target model amount
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Modeled volume
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Syringe reading
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Theoretical portions
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Visual model
Vial concentration and syringe-scale math
10mg 2.00mL
Step 1
10.00mg + 2.00mL
Creates 5.00mg/mL solution
Step 2
0.25mg target
Dose concentration is calculated from the selected content source.
Modeled volume
0255075100
5.0 units on U-100
Quick arithmetic reference
Amount
Modeled mL
Syringe-scale reading
% of vial
What this model does: let you enter hypothetical phase inputs, then plot dose-equivalent model levels over time. It shows simplified accumulation while modeled events continue and washout as the selected half-life reduces the model level. The results are dose-equivalent model levels, not measured blood concentrations, personalized pharmacokinetics, or treatment instructions.
Supply estimate: total milligrams are summed from the displayed simulation window using the selected device type. When pen or vial capacities are configured, supply planning compares all-smallest, mixed, and all-largest capacity options. Retatrutide vial entries are generic capacity estimates only because Retatrutide has no approved commercial retail product data.
Event table: choose a first modeled event date/time and pen/click arithmetic basis above. The table shows each modeled event number, calendar date, weekday/time, input amount, and click arithmetic when a click basis is available. These are model outputs only, not instructions for use.
Reading the chart: the bold teal curve is the cumulative model level (superposition of every active modeled event). The x-axis uses calendar dates plus model day, and the view continues after the final event only while the washout tail still materially affects the model. The faint violet dashed curves are each individual event contribution waning over its own half-life. Hover anywhere to snap to a calendar day and see meaningful prior-event washout contributions.
Custom inputs: define amount / interval / repeat-count phases and watch how the cumulative model level ramps, re-equilibrates, and washes out as it crosses phase boundaries. Presets are examples only and change with the selected entry.
Stacks: combinations such as BPC-157 + TB-500 or CJC-1295 + Ipamorelin contain compounds with different half-lives. Stack selections model each component separately, then chart a normalized combined exposure index so unlike milligram amounts are not treated as the same concentration.
Caveats: this is a simple immediate-input, first-order decay model. Real absorption, metabolism, product quality, formulation, route, interactions, and individual response can differ materially. Any real-world medication, peptide, vial, device, route, concentration, amount, or timing decision must be handled by a licensed clinician or pharmacist using the official materials for the exact product.
Peptide Half-Life and Educational Exposure Model
This educational peptide half-life calculator models hypothetical microdosing and micro-dosing exposure inputs for GLP-1 and related medications. It can show simplified modeled accumulation, steady exposure, and washout for semaglutide, tirzepatide, retatrutide, dulaglutide, and liraglutide products such as Ozempic, Wegovy, Zepbound, Mounjaro, Trulicity, Saxenda, and Victoza.
It also includes research-only and peptide-adjacent entries such as BPC-157, TB-500, thymosin alpha-1, GHK-Cu, AOD-9604, CJC-1295, Ipamorelin, GHRP-2, GHRP-6, MOTS-c, Epitalon, Selank, Semax, DSIP, Kisspeptin-10, Melanotan II, Bremelanotide, and Orforglipron.
Half-life and washout
A medication half-life is the time it takes for the modeled amount in the system to fall by half. The chart extends beyond the last modeled event to show the washout tail in this simplified first-order decay model.
Hypothetical exposure inputs
Build an educational scenario by entering an amount in milligrams, a model interval in days, and a repeat count. The calculator totals each modeled event and overlays the combined exposure line with optional individual event curves.
Pens, vials, and clicks
For supported devices, the supply estimate compares pen or vial capacities and shows click-count arithmetic when a real click basis is available, including KwikPen arithmetic for compatible tirzepatide devices. This is not device instruction.
Common searches this calculator helps with
GLP-1 half-life calculator and medication washout calculator
Tirzepatide, semaglutide, retatrutide, dulaglutide, and liraglutide half-life models
BPC-157, TB-500, Thymosin Alpha-1, GHK-Cu, CJC-1295, Ipamorelin, MOTS-c, Selank, Semax, and research peptide exposure modeling
Peptide microdosing model, micro-dosing exposure model, total mg used, pen supply arithmetic, and KwikPen click arithmetic
Educational Use and Liability Notice
MicrodosingCalculator.com is for educational modeling only. It is not medical advice, dosing advice, prescribing guidance, compounding guidance, reconstitution guidance, injection-volume guidance, pharmacy guidance, diagnosis, treatment, prevention advice, or a substitute for consultation with a licensed medical practitioner, pharmacist, or other qualified clinician.
Do not use this website to decide what peptide, medication, product, vial amount, pen amount, injection volume, concentration, schedule, route, number of clicks, or device action to use. Reported, community, research, trial-style, or placeholder examples are not recommendations. All actual treatment, dosing, medication changes, device use, compounding, reconstitution, storage, and injection decisions must be made with a qualified medical professional and the official instructions supplied with the specific product being used.
Some listed substances are investigational, unapproved, research-only, prescription-only, compounded, peptide-adjacent, or not reviewed by FDA for safety, effectiveness, or quality for the modeled use. Unapproved products, mislabeled products, incorrect concentrations, counterfeit products, unsafe sources, and calculation or measurement errors can cause serious harm.
Pen, click, vial, concentration, and syringe-scale information is provided only as general educational arithmetic. Devices and products can differ by medication, country, concentration, manufacturer, version, packaging, instructions, or future design changes. Site behavior may not match your exact product or device. Always follow the current official label, patient information leaflet, prescriber instructions, and pharmacist guidance for your exact pen, vial, syringe, medication, or device.
This site may contain mistakes, incomplete assumptions, outdated information, calculation issues, display issues, browser-specific behavior, data-entry errors, or other undiscovered problems. To the fullest extent permitted by law, MicrodosingCalculator.com and its owners/operators are not responsible for any loss, injury, overdose, underdose, adverse event, treatment failure, device misuse, product misuse, calculation error, direct or indirect damages, reliance, or other harm arising from use of or inability to use this website. By using this site, you accept full responsibility for verifying all information with a qualified medical professional before taking any action.