Find your exact dose and how much to draw
Select your peptide, set your dose, and see exactly where to fill the syringe. The calculator handles all the unit conversions and tells you how many vials you need for your cycle.
Peptides come as a powder that needs to be mixed with bacteriostatic water before injecting - and the most common question is how far to pull the syringe to get the right amount. This calculator removes the guesswork: select your peptide, set your dose, and it shows the exact syringe line to fill to. No more converting between mg, mcg, IU, and units - the calculator handles it all, and tells you how many vials you need for your full cycle and the cost per injection. It supports the most popular peptides - Semaglutide, Tirzepatide, Retatrutide, BPC-157, TB-500, HGH, Ipamorelin, Melanotan II, PT-141 and HCG - plus every other Deus Medical and Astera Labs peptide, so whatever you are running, the dose is already worked out.
New to peptides? A 60-second guide. Pick the dose tagged "recommended start" in the calculator and follow these five rules.
- Start low - pick the green "recommended start" dose.
- Let the calculator pick your water - just mix the powder with that much bacteriostatic water.
- Hold that dose 4 weeks before changing anything.
- One peptide at a time on cycle 1, so you know what works.
- Track it weekly - sleep, energy, side effects.
3 mistakes to avoid show details
- Jumping doses too fast. Most users need 4-8 weeks at one dose before increasing. Going up early hides what's working.
- Expecting results in 2 weeks. Visible changes take 4-12 weeks for most peptides. Consistency beats dose every time.
- Skipping cycle-off periods. Most peptides need 4-8 weeks off between cycles. Year-round use desensitises receptors.
Which peptide is right for you?
In short: tell us your goal and we will point you to the best-matched peptide, then load it into the calculator.
How to reconstitute peptides
In short: mix the freeze-dried powder with bacteriostatic water, swirl gently (never shake), then refrigerate. About 2 minutes.
The 4 mixing steps, how much water, and storage show details
All peptides come as a freeze-dried powder (lyophilized) that must be mixed with bacteriostatic water before injection. This process is called reconstitution.
Step-by-step reconstitution Takes 2 min
- Clean the tops of both the peptide vial and the BAC water vial with an alcohol swab.
- Draw the desired amount of BAC water into an insulin syringe (most users use 2 ml).
- Inject the water slowly into the peptide vial, aiming at the glass wall - not directly onto the powder.
- Gently swirl the vial until the powder is fully dissolved. Do not shake.
After reconstitution
- Refrigerate at 2-8C (36-46F). Do not freeze.
- Most peptides are stable for 28 days after reconstitution.
- HCG lasts up to 60 days with BAC water. MOD GRF 1-29 and Follistatin are more fragile - use within 14 days.
- Always use bacteriostatic water (not sterile water) for multi-dose vials. The benzyl alcohol preservative prevents bacterial growth.
For the full visual guide, see our peptide reconstitution guide.
Dosage guide by category
In short: typical starting protocols for every peptide category - or just pick a product above and the calculator shows its full protocol.
All categories: GH, recovery, GLP-1, aesthetic, immune, fertility show details
Quick reference for the most common protocols across all peptide categories. Select any product in the calculator to see its full detailed protocol.
Yes, draw together: a GHRP + GHRH pair - Ipamorelin, GHRP-2 or GHRP-6 mixed with MOD GRF 1-29 in the same syringe. Also BPC-157 + TB-500 (our combo vial is already pre-blended into one).
No, inject separately: never mix peptides from different categories (for example BPC-157 with Semaglutide, or Melanotan with Ipamorelin) - different pH and stability can degrade them. When unsure, give two separate injections; it never weakens the effect.
Growth Hormone (GH)
HGH and peptides that stimulate your body's own growth hormone production.
- HGH (Deustropin / Asteras) - Anti-aging: 1-2 IU daily. Fat loss: 2-4 IU. Bodybuilding: 4-8 IU. Minimum 3-6 months.
- Ipamorelin + MOD GRF 1-29 - The #1 recommended peptide stack. 200-300 mcg Ipa + 100 mcg MOD GRF, 2-3x daily on empty stomach. 8-16 weeks.
- GHRP-2 / GHRP-6 - 100 mcg per injection (going higher adds little benefit). 2-3x daily on empty stomach. GHRP-6 causes strong hunger - best for bulking.
- CJC-1295 DAC - Long-acting (8-day half-life). 1-2 mg per week total. Only needs 1-2 injections per week.
Recovery & Healing
Peptides for injury repair, tendon healing, and tissue recovery.
- BPC-157 - 250 mcg 2x daily, injected near the injury site. 4-8 weeks per injury. Very well tolerated.
- TB-500 - Loading: 2 mg 2x/week for 4-6 weeks. Maintenance: 2 mg 1x/week. Systemic - any injection site.
- TB-500 + BPC-157 combo - The "Wolverine Stack". Local + systemic healing combined. 8-12 weeks.
Weight Loss / GLP-1
Peptides that reduce appetite and help you lose weight. Once-weekly injection.
- Semaglutide - Start 0.25 mg, titrate up every 4 weeks. Most settle at 0.5-1.0 mg/week. 1x weekly injection.
- Tirzepatide - Stronger than Semaglutide. Start 2.5 mg, sweet spot 7.5-10 mg/week. 1x weekly.
- Retatrutide - Triple agonist, strongest in trials (28.7% weight loss at 68 weeks). Start 2 mg, most settle at 4-8 mg/week.
Aesthetic & Functional
Tanning, libido, nootropics, sleep, and skin rejuvenation.
- Melanotan II - Loading: 250-500 mcg daily (evening). Maintenance: 500 mcg 1-2x/week. UV exposure within 2-4 hours.
- PT-141 - 1-1.75 mg as needed, 45-60 min before activity. On-demand - no cycle needed.
- GHK-Cu - 1-2 mg daily for skin/hair/wound healing. 30-day or 8-12 week cycles.
- Selank + Semax - Stack for calm focus. Selank 250-500 mcg (anti-anxiety) + Semax 300-500 mcg (focus). 2-4 week courses.
Immune & Longevity
Short intensive courses for immune support and anti-aging.
- Epithalon - 5-10 mg daily for 10-20 days, then 4-6 months off. 2-3 cycles per year. Evening injection.
- Thymalin - 5-10 mg daily for 5-10 days, then 3-6 months off. Often timed around flu season.
- Thymosin Alpha-1 - 1.5 mg 2x/week. One of the few peptides run long-term (6-12 months continuously).
- MOTS-c - 5 mg every 5 days (4 injections per cycle). Exercise mimetic for metabolism and endurance.
Fertility & Hormonal Support
Testicular function maintenance and fertility recovery.
SubQ injection for peptides
In short: most peptides inject under the skin - pinch fat on the belly, flank, or outer thigh, insert at 45 degrees, and rotate sites. Nearly painless.
Injection sites and rotation show details
Almost all peptides are injected subcutaneously (under the skin, into the fat layer) using a standard insulin syringe - the same thin needle used by diabetics. Pinch a fold of skin and insert at a 45-degree angle. It is nearly painless.
Injection sites
- Lower abdomen - at least 5 cm from the navel in any direction. Most common site.
- Love handles / flanks - the soft tissue at the sides of the waist.
- Upper outer thigh - pinchable fat along the outer thigh (not the muscle).
Rotate between sites to avoid irritation. For BPC-157, inject as close to the injury as possible. PEG MGF is the exception - inject it intramuscularly into the muscle you just trained. For full injection instructions with photos, see the SubQ injection sites section in our injection guide.
FAQ
How do I know which peptide is right for me?
What results can I expect and how fast?
What syringe should I use for peptide injections?
Do I need to inject on an empty stomach?
Can I mix two peptides in the same syringe?
How much bacteriostatic water should I use?
How long do reconstituted peptides last?
What if I miss a dose?
Where can I buy peptides?
