Peptide Vial Supply Planner

Enter your vial size, dose, and injection frequency to calculate exactly how many doses you have, when your vial runs out, and when to place your next order.

Peptide / Medication

Vial size (mg)

Bacteriostatic water (mL)

Dose per injection

Injection frequency

First injection date

Your Vial Supply Plan

Total doses

per vial

Days supply

days per vial

Draw per dose

10.0

units (U-100 syringe)

Concentration

2.50

mg/mL

First injection

Apr 27, 2026

Recommended reorder by

May 10, 2026

7 days before depletion — allows shipping time

Estimated vial depletion

May 17, 2026

Last dose from this vial

Volume Breakdown

Concentration

2.50 mg/mL

Volume per dose

0.100 mL

Draw on syringe

10.0 units

Injections / week

7×

How to Use This Planner

Select Your Peptide

Choose from common presets or select Custom to enter your own values. Presets fill in typical vial sizes and doses automatically.

Confirm Vial & Dose

Verify the vial size (mg), water volume (mL), and dose per injection. Change the unit between mcg and mg as needed.

Set Frequency & Start Date

Select how often you inject and enter the date of your first injection. The planner calculates everything from there.

Read Your Supply Plan

See total doses, days supply, depletion date, and the recommended reorder date — 7 days before your vial runs out.

Frequently Asked Questions

What is bacteriostatic water and how much should I add?

Bacteriostatic water (BAC water) is sterile water with 0.9% benzyl alcohol, which prevents bacterial growth in the reconstituted vial. The amount you add determines concentration: more water = lower concentration (larger volume per dose), less water = higher concentration (smaller volume per dose). The total peptide stays the same regardless. Common ranges are 1–3 mL for most peptide vials.

What are 'units' on an insulin syringe?

Insulin syringes use a U-100 scale where 100 units = 1 mL. So 10 units = 0.1 mL, 50 units = 0.5 mL, etc. This is the standard used for peptide injections. The planner calculates exactly how many units to draw for your dose.

Why does the planner recommend reordering 7 days early?

A 7-day buffer accounts for typical shipping times and ensures you never miss a dose. For weekly-dosed peptides or medications, running out between shipments means at least a week's gap. Ordering one week early keeps your protocol uninterrupted.

How long does a reconstituted peptide vial stay stable?

Most reconstituted peptides stored at 2–8°C (standard refrigerator) remain stable for 3–4 weeks. Always keep reconstituted peptides refrigerated, never freeze them, and protect from light. Check the specific peptide's storage instructions — stability varies.

What if my dose changes during the protocol?

Re-enter your new dose when it changes. The planner will recalculate the depletion date and units per injection from that point forward. During dose escalation (e.g., semaglutide titration), your vial may last longer than expected at lower doses.

Difference from the Reconstitution Calculator

The Reconstitution Calculator tells you how many units to draw for a single dose. This Vial Supply Planner adds injection frequency and a start date to give you the full supply timeline — useful for protocol planning, ordering ahead, and avoiding gaps in your protocol.

Medical Disclaimer

This content is for informational and educational purposes only and does not constitute medical advice, diagnosis, or treatment recommendations.

Always consult a qualified healthcare provider before starting, stopping, or modifying any treatment. Do not disregard professional medical advice based on information found on this site.

No claims of therapeutic efficacy are made for substances that are not FDA-approved for the discussed indications. Research citations reflect published findings and do not imply endorsement.