Free Peptide Tools
Free Peptide Tools. Real Pharmacokinetic Math.
These are free demos of the PK reasoning layer baked into the full DoseCraft app. Every calculation runs client-side — no tracking, no signup, no email gate.
Reconstitution
Reconstitution Calculator
BAC water math with a live syringe draw-line. Know the exact unit mark on a U-100 before you pin.
Open toolHalf-Life Decay
Half-Life Decay Curve
Multi-dose superposition across any half-life. See steady-state Cmax and Cmin before you start a protocol.
Open toolInteraction Checker
Stack Overlap Checker
Pair up to 5 compounds. GH-axis redundancy, GLP-1 double-agonism, healing-stack synergy — flagged instantly.
Open toolDose Converter
Dose Unit Converter
mg ↔ mcg ↔ IU ↔ mL. U-100 insulin syringe reference card. HGH IU conversions covered.
Open toolVendor Transparency Index
Vendor Transparency Index
Neutral scoring of peptide vendors on COA transparency, purity claims, and community trust. Vendor relationships are disclosed and scored on the same rubric.
Open toolStack Optimizer
Peptide Stack Optimizer
Add two or more peptides to see half-life overlap, mechanism redundancy, interaction risk, and the best dose timing.
Open toolDose Calculator
Peptide Dose Calculator
Pick a compound, enter vial size and water, and see the units to draw on a 30, 50 or 100-unit syringe — plus vials and cost for a full protocol.
Open toolVial Duration
Vial Duration Calculator
How many days one vial lasts at your dose and injections per week, the date it runs out, and the cost per dose.
Open toolIU Converter
IU & Concentration Converter
IU to mcg for HGH, insulin, HCG or your own factor, and mg to mL for any concentration.
Open toolHalf-Life by Compound
Half-Life Calculator by Compound
Choose any compound in the library and see how long a dose lasts: time to 50%, 25%, 10% and 1%, with a decay chart.
Open toolBlood Concentration
Blood Concentration Estimator
Compare estimated blood levels for up to three library compounds at your dose and frequency: peak, trough and steady state.
Open toolWant all this inside one app, with logging, reminders, and AI?
DoseCraft Pro wraps these calculators around 90+ compounds, a PK-aware AI copilot, vendor trust scores, and a full dose-log engine. One subscription. No ads.
For research use only. Not for human consumption. Not evaluated by the FDA. Not intended to diagnose, treat, cure, or prevent any disease. DoseCraft is an informational tool — not medical advice.