--- title: "Peptide Calculator: Free Reconstitution & Syringe Tool" url: https://www.bodyhackguide.co/tools/reconstitution description: "Free peptide reconstitution calculator: enter vial mg + BAC water to get concentration (mg/mL) and units on a U-100 syringe scale. For laboratory research use" lang: en --- Skip to content Compare notes on r/BodyHackGuide (https://reddit.com/r/bodyhackguide) Compare notes with other researchers. Join r/BodyHackGuide (https://reddit.com/r/bodyhackguide) # Peptide Calculator Reconstitution and syringe-unit math. Research use only. Start from a preset All 34 presets mg Total peptide mass on the vial label Amount of bacteriostatic water to add Target amount per draw (research reference) Add vial price to see cost per draw $ What you paid for the vial, used to compute cost per draw Draw to 10.0 units for a 500 mcg amount. That is 0.100 mL per draw. U-100 syringe 0 10 20 30 40 50 60 70 80 90 100 10.0 units Draw to this line ## What next Compare peptide prices Price per mg across vendors: https://www.bodyhackguide.co/compare Get the cheat sheet Free PDF, 38 compounds and blends: https://www.bodyhackguide.co/guides/peptide-cheat-sheet-download Intranasal calculator mcg per spray and sprays per bottle: https://www.bodyhackguide.co/tools/intranasal Reconstitution guide Five mixing steps, plus storage: https://www.bodyhackguide.co/guides/how-to-reconstitute-peptides Concentration 5.00 mg/mL 5000 mcg/mL Volume per Draw 0.100 mL Volume to draw from the vial Syringe Draw 10.0 units On a U-100 syringe scale Draws per Vial 20 draws **Research use only.** This tool performs reconstitution math: concentration and syringe-unit conversion. It is not dosing guidance for humans or animals. Example: 10 mg vial + 2 mL BAC water = 5 mg/mL. At that concentration, a 250 mcg amount = 0.05 mL = 5 units on a U-100 syringe scale. ### Quick Syringe Reference Units Volume (mL) Amount (mcg) Amount (mg) 5 0.05 250 0.250 10you 0.10 500 0.500 15 0.15 750 0.750 20 0.20 1000 1.000 25 0.25 1250 1.250 50 0.50 2500 2.500 ## How peptide reconstitution works Peptide reconstitution means dissolving a freeze-dried (lyophilized) peptide powder in bacteriostatic water so it can be drawn up into a syringe and measured. Two numbers decide your draw: the **concentration** of the mixed vial, and your **target amount**. The answer is a number of units on a U-100 syringe scale. The peptide reconstitution formula concentration (mg/mL) = mg of peptide / mL of BAC water units on a U-100 syringe scale = (target amount in mg / concentration in mg per mL) × 100 On a U-100 syringe, 100 units = 1 mL, so 1 unit = 0.01 mL. To convert an amount in micrograms to milligrams, divide by 1,000 (250 mcg = 0.25 mg). In one sentence: **divide the peptide mass by the water volume to get concentration, divide your target amount by that concentration to get the volume in mL, then multiply by 100 to get syringe units.** Worked examples Example 1: BPC-157, 10 mg vial 10 mg peptide + 2 mL BAC water = 5 mg/mL. For a 250 mcg (0.25 mg) amount: 0.25 / 5 = 0.05 mL = 5 units on a U-100 syringe. Example 2: Semaglutide, 5 mg vial 5 mg peptide + 2 mL BAC water = 2.5 mg/mL. For a 250 mcg (0.25 mg) amount: 0.25 / 2.5 = 0.10 mL = 10 units on a U-100 syringe. Example 3: Tirzepatide, 60 mg vial 60 mg peptide + 6 mL BAC water = 10 mg/mL. For a 2.5 mg amount: 2.5 / 10 = 0.25 mL = 25 units on a U-100 syringe. Add the water slowly down the inside wall of the vial. Never spray it directly onto the powder. Swirl gently to dissolve; do not shake. Store the reconstituted vial refrigerated at 2-8°C (36-46°F) and use it within about 28 days. Bacteriostatic water contains 0.9% benzyl alcohol, a preservative that lets a multi-use vial stay usable for roughly four weeks refrigerated; plain sterile water has no preservative and should be used within 24 hours. **Sourcing note:** some peptide vendors sell bacteriostatic water alongside their vials. Check the label for 0.9% benzyl alcohol. ### Reconstitution reference Five mixing steps, the mg/mL math with a worked example, and storage. Read the reconstitution guide (https://www.bodyhackguide.co/guides/how-to-reconstitute-peptides) ## All 34 presets Click Load on any row to auto-fill the calculator above. ### Healing & Recovery | Peptide | Vial | Solvent | Amount | Syringe | | | --- | --- | --- | --- | --- | --- | | BPC-157 | 10 mg | 2 mL BAC | 500 mcg | 10.0 units | Load BPC-157 preset | | TB-500 | 10 mg | 2 mL BAC | 3000 mcg | 60.0 units | Load TB-500 preset | | BPC/TB Blend | 20 mg | 2 mL BAC | 500 mcg | 5.0 units | Load BPC/TB Blend preset | | GHK-Cu | 50 mg | 3 mL BAC | 2000 mcg | 12.0 units | Load GHK-Cu preset | | KPV | 10 mg | 2 mL BAC | 500 mcg | 10.0 units | Load KPV preset | | Thymosin α1 | 10 mg | 2 mL BAC | 1500 mcg | 30.0 units | Load Thymosin α1 preset | | Glow Blend | 70 mg | 3 mL BAC | 1670 mcg | 7.2 units | Load Glow Blend preset | | KLOW Blend | 80 mg | 3 mL BAC | 1670 mcg | 6.3 units | Load KLOW Blend preset | ### Fat Loss & Metabolic | Peptide | Vial | Solvent | Amount | Syringe | | | --- | --- | --- | --- | --- | --- | | Semaglutide | 30 mg | 3 mL BAC | 500 mcg | 5.0 units | Load Semaglutide preset | | Tirzepatide | 60 mg | 6 mL BAC | 2500 mcg | 25.0 units | Load Tirzepatide preset | | Retatrutide | 10 mg | 3 mL BAC | 1000 mcg | 30.0 units | Load Retatrutide preset | | Cagrilintide | 10 mg | 2 mL BAC | 250 mcg | 5.0 units | Load Cagrilintide preset | | Tesamorelin | 10 mg | 2 mL BAC | 1000 mcg | 20.0 units | Load Tesamorelin preset | | MOTS-c | 10 mg | 2 mL BAC | 1000 mcg | 20.0 units | Load MOTS-c preset | | 5-Amino-1MQ | 10 mg | 2 mL BAC | 1000 mcg | 20.0 units | Load 5-Amino-1MQ preset | | AOD-9604 | 5 mg | 2 mL BAC | 300 mcg | 12.0 units | Load AOD-9604 preset | ### Growth Hormone | Peptide | Vial | Solvent | Amount | Syringe | | | --- | --- | --- | --- | --- | --- | | CJC/Ipa Blend | 10 mg | 2 mL BAC | 250 mcg | 5.0 units | Load CJC/Ipa Blend preset | | Ipamorelin | 5 mg | 2 mL BAC | 250 mcg | 10.0 units | Load Ipamorelin preset | | Sermorelin | 5 mg | 2 mL BAC | 250 mcg | 10.0 units | Load Sermorelin preset | | GHRP-2 | 5 mg | 2 mL BAC | 200 mcg | 8.0 units | Load GHRP-2 preset | | GHRP-6 | 5 mg | 2 mL BAC | 200 mcg | 8.0 units | Load GHRP-6 preset | | Hexarelin | 2 mg | 2 mL BAC | 150 mcg | 15.0 units | Load Hexarelin preset | | IGF-1 LR3acetic acid | 1 mg | 1 mL (acetic acid) | 100 mcg | 10.0 units | Load IGF-1 LR3 preset | | HGH Frag 176-191 | 5 mg | 2 mL BAC | 350 mcg | 14.0 units | Load HGH Frag 176-191 preset | ### Cognitive & Mood | Peptide | Vial | Solvent | Amount | Syringe | | | --- | --- | --- | --- | --- | --- | | Semax | 30 mg | 3 mL BAC | 1000 mcg | 10.0 units | Load Semax preset | | Selank | 30 mg | 3 mL BAC | 1000 mcg | 10.0 units | Load Selank preset | | Oxytocin | 5 mg | 2 mL BAC | 50 mcg | 2.0 units | Load Oxytocin preset | | DSIP | 5 mg | 2 mL BAC | 200 mcg | 8.0 units | Load DSIP preset | | Kisspeptin-10 | 5 mg | 2 mL BAC | 75 mcg | 3.0 units | Load Kisspeptin-10 preset | ### Immune & Longevity | Peptide | Vial | Solvent | Amount | Syringe | | | --- | --- | --- | --- | --- | --- | | NAD+ | 500 mg | 5 mL BAC | 75000 mcg | 75.0 units | Load NAD+ preset | | Epithalon | 10 mg | 2 mL BAC | 7500 mcg | 150.0 units | Load Epithalon preset | | LL-37 | 5 mg | 2 mL BAC | 175 mcg | 7.0 units | Load LL-37 preset | ### Sexual & Cosmetic | Peptide | Vial | Solvent | Amount | Syringe | | | --- | --- | --- | --- | --- | --- | | PT-141 | 10 mg | 2 mL BAC | 500 mcg | 10.0 units | Load PT-141 preset | | Melanotan 2 | 10 mg | 2 mL BAC | 250 mcg | 5.0 units | Load Melanotan 2 preset | ### Related Guides Peptide Cheat Sheet: https://www.bodyhackguide.co/guides/dosing-cheat-sheet How to Reconstitute BPC-157: https://www.bodyhackguide.co/blog/how-to-reconstitute-bpc-157 How to Reconstitute Peptides: https://www.bodyhackguide.co/guides/how-to-reconstitute-peptides Intranasal Spray Calculator: https://www.bodyhackguide.co/tools/intranasal ## Frequently Asked Questions ### What is the peptide reconstitution formula? ### Is this a peptide dosage calculator? ### How much bacteriostatic water do I add to a peptide vial? ### How do I read units on a U-100 syringe scale for peptides? ### How long does reconstituted peptide last, and how should it be stored? ### Can I reuse the same peptide vial for multiple draws? ### What syringe is best for small peptide draws? ## Embed This Calculator on Your Site Drop the reconstitution calculator into any blog post, documentation page, or vendor product page. Free, with optional white-label mode. Pre-fill values via `?vial=5&water=2&dose=250` or add cost-per-draw math with `?price=85`. Match your brand with `?accent=%23hex` and `?vendor=Your%20Brand`. Preview the embed: https://www.bodyhackguide.co/embed/reconstitution · See the 5 drop-in presets and the URL parameter docs: https://www.bodyhackguide.co/tools/embed-calculators ## Compound-Specific Calculators Pre-filled reconstitution calculators for popular peptides. Tap to jump straight to your compound. BPC-157 5 mg vial · 250 mcg: https://www.bodyhackguide.co/tools/reconstitution/bpc-157 TB-500 5 mg vial · 2500 mcg: https://www.bodyhackguide.co/tools/reconstitution/tb-500 Semaglutide 5 mg vial · 250 mcg: https://www.bodyhackguide.co/tools/reconstitution/semaglutide Tirzepatide 10 mg vial · 2500 mcg: https://www.bodyhackguide.co/tools/reconstitution/tirzepatide Retatrutide 10 mg vial · 2000 mcg: https://www.bodyhackguide.co/tools/reconstitution/retatrutide CJC-1295 (Mod GRF 1-29) 2 mg vial · 100 mcg: https://www.bodyhackguide.co/tools/reconstitution/cjc-1295 Ipamorelin 5 mg vial · 200 mcg: https://www.bodyhackguide.co/tools/reconstitution/ipamorelin GHK-Cu 5 mg vial · 200 mcg: https://www.bodyhackguide.co/tools/reconstitution/ghk-cu PT-141 (Bremelanotide) 10 mg vial · 1750 mcg: https://www.bodyhackguide.co/tools/reconstitution/pt-141 Semax 5 mg vial · 200 mcg: https://www.bodyhackguide.co/tools/reconstitution/semax Selank 5 mg vial · 250 mcg: https://www.bodyhackguide.co/tools/reconstitution/selank MOTS-c 5 mg vial · 5000 mcg: https://www.bodyhackguide.co/tools/reconstitution/mots-c AOD-9604 5 mg vial · 300 mcg: https://www.bodyhackguide.co/tools/reconstitution/aod-9604 DSIP 2 mg vial · 100 mcg: https://www.bodyhackguide.co/tools/reconstitution/dsip Epithalon 10 mg vial · 5000 mcg: https://www.bodyhackguide.co/tools/reconstitution/epithalon Free 2026 Peptide Cheat Sheet (PDF) 38 compounds and blends: vial sizes, BAC water volumes, dosing ranges and bloodwork markers. Download Free (https://www.bodyhackguide.co/guides/peptide-cheat-sheet-download) Image: BodyHackGuide (https://www.bodyhackguide.co/assets/bodyhackguide-logo-DOzZNUyh.webp) ### BodyHackGuide Your biohacking research hub: compound pricing, brain health protocols, dosing tools, and vendor reviews. support@bodyhackguide.co Join our Discord: https://discord.gg/Mhq5UdRYBA r/BodyHackGuide on Reddit: https://reddit.com/r/BodyHackGuide #### Explore - Compare prices: https://www.bodyhackguide.co/compare - Vendors: https://www.bodyhackguide.co/vendors - Deals: https://www.bodyhackguide.co/deals - Coupons: https://www.bodyhackguide.co/coupons - Nootropics: https://www.bodyhackguide.co/nootropics - Brain health: https://www.bodyhackguide.co/brain-health - Blog: https://www.bodyhackguide.co/blog - Guides: https://www.bodyhackguide.co/guides #### Tools - Reconstitution: https://www.bodyhackguide.co/tools/reconstitution - Half-life visualizer: https://www.bodyhackguide.co/tools/halflife - COA reader: https://www.bodyhackguide.co/tools/coa - Cost calculator: https://www.bodyhackguide.co/tools/cost-calculator - Stack builder: https://www.bodyhackguide.co/stack-builder - All tools: https://www.bodyhackguide.co/tools #### Trust & vendors - Vendor directory: https://www.bodyhackguide.co/vendors - Trust scorecard: https://www.bodyhackguide.co/vendors/scorecard - Vendor trust badge: https://www.bodyhackguide.co/vendors/get-vetted - Scoring methodology: https://www.bodyhackguide.co/vendors/methodology - Peptide cheat sheet: https://www.bodyhackguide.co/guides/peptide-cheat-sheet-download #### Company - About: https://www.bodyhackguide.co/about - Affiliate disclosure: https://www.bodyhackguide.co/affiliate-disclosure - Editorial standards: https://www.bodyhackguide.co/editorial-standards - Creators: https://www.bodyhackguide.co/creators - Coaches: https://www.bodyhackguide.co/coaches - 1-on-1 coaching: https://www.bodyhackguide.co/coaching - Privacy: https://www.bodyhackguide.co/privacy - Terms: https://www.bodyhackguide.co/terms - Full site directory: https://www.bodyhackguide.co/site-directory **Affiliate Disclosure:** We rank every vendor on the same public, reproducible methodology (https://www.bodyhackguide.co/vendors/methodology), and we earn a commission from purchases made through some of our links at no extra cost to you. Full details in our affiliate disclosure (https://www.bodyhackguide.co/affiliate-disclosure). **Research Disclaimer:** All compounds listed are for laboratory and research purposes only. Not for human consumption. This site does not sell or ship any products. Always consult a qualified healthcare professional and comply with local regulations. © 2026 BodyHackGuide. All rights reserved. · Terms (https://www.bodyhackguide.co/terms) · Privacy (https://www.bodyhackguide.co/privacy) ## Structured data ```json [ { "@context": "https://schema.org", "@type": "FAQPage", "mainEntity": [ { "@type": "Question", "name": "What is the peptide reconstitution formula?", "acceptedAnswer": { "@type": "Answer", "text": "Concentration (mg/mL) = mg of peptide ÷ mL of bacteriostatic water. Then the units to draw on a U-100 syringe scale = (target amount in mg ÷ concentration in mg per mL) × 100. Example: 10 mg of peptide in 2 mL of BAC water is 5 mg/mL; a 250 mcg (0.25 mg) target is 0.25 ÷ 5 = 0.05 mL = 5 units." } }, { "@type": "Question", "name": "Is this a peptide dosage calculator?", "acceptedAnswer": { "@type": "Answer", "text": "No. It runs reconstitution and syringe-unit math for laboratory research: the concentration (mg/mL) of a mixed vial and the equivalent units on a U-100 syringe scale. It does not recommend how much of any compound to use, for a person or an animal. If you searched 'dosage calculator,' the reconstitution math above is almost certainly what you need: turning a vial size and a water volume into a concentration and a syringe mark." } }, { "@type": "Question", "name": "How much bacteriostatic water do I add to a peptide vial?", "acceptedAnswer": { "@type": "Answer", "text": "There is no single fixed amount: the volume you add sets the concentration, so pick a volume that makes your draw easy to measure. Common choices: 2 mL into a 5 mg vial gives 2.5 mg/mL, and 2 mL into a 10 mg vial gives 5 mg/mL. More water means a lower concentration and more units per draw (easier to measure but a fuller syringe); less water means a higher concentration and fewer units. Use the calculator above to test any combination." } }, { "@type": "Question", "name": "How do I read units on a U-100 syringe scale for peptides?", "acceptedAnswer": { "@type": "Answer", "text": "A standard U-100 syringe scale is marked in units where 100 units = 1 mL, so 1 unit = 0.01 mL. To find your draw, multiply your volume per draw in mL by 100. For example, 0.05 mL = 5 units, and 0.10 mL = 10 units. The 'units' and 'IU' markings on the barrel refer to the same lines; 1 cc = 1 mL exactly." } }, { "@type": "Question", "name": "How long does reconstituted peptide last, and how should it be stored?", "acceptedAnswer": { "@type": "Answer", "text": "Once mixed with bacteriostatic water, most peptides are stable for about 28 days when refrigerated at 2-8°C (36-46°F) and kept out of light. The 0.9% benzyl alcohol in BAC water acts as a preservative. Do not freeze a reconstituted vial, and discard it if the solution turns cloudy or discolored. Lyophilized (un-mixed) peptide powder keeps far longer: months to years frozen at -20°C. Check the supplier's sheet for the specific compound." } }, { "@type": "Question", "name": "Can I reuse the same peptide vial for multiple draws?", "acceptedAnswer": { "@type": "Answer", "text": "Yes, that is the point of bacteriostatic water. The benzyl alcohol preservative makes the vial multi-use, so you can take repeated draws over roughly 28 days refrigerated. Wipe the rubber stopper with a fresh alcohol swab before every draw, use a new sterile needle each time, and never return drawn solution to the vial. If you reconstitute with plain sterile water instead, the vial has no preservative and should be treated as single-use within 24 hours." } }, { "@type": "Question", "name": "What syringe is best for small peptide draws?", "acceptedAnswer": { "@type": "Answer", "text": "For most research draws, a U-100 (1 mL) syringe is marked directly in units (100 units = 1 mL), so the units you calculate read straight off the barrel scale, with no mL conversion. For very small draws (under 5 units), a 0.3 mL (30-unit) syringe has more widely spaced markings, so the line is easier to read. If a single draw would exceed 100 units, reconstitute with less water to raise the concentration so it fits on one barrel, or split it into smaller draws." } } ] }, { "@context": "https://schema.org", "@type": "BreadcrumbList", "itemListElement": [ { "@type": "ListItem", "position": 1, "name": "Home", "item": "https://www.bodyhackguide.co/" }, { "@type": "ListItem", "position": 2, "name": "Tools", "item": "https://www.bodyhackguide.co/tools" }, { "@type": "ListItem", "position": 3, "name": "Peptide Calculator", "item": "https://www.bodyhackguide.co/tools/reconstitution" } ] }, { "@context": "https://schema.org", "@type": "SoftwareApplication", "name": "Peptide Reconstitution Calculator", "description": "Free peptide reconstitution calculator: enter vial mg and bacteriostatic water volume to get concentration (mg/mL) and units on a U-100 syringe scale. 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