Peptide calculator.
Peptide math comes down to one line: concentration equals the peptide in the vial divided by the water you add. A 5 mg vial in 2 mL of bacteriostatic water is 2,500 mcg per mL, or 25 mcg per unit on a U-100 insulin syringe.
These calculators run that arithmetic, and the harder variants of it, on the numbers you enter: reconstitution, microgram to syringe unit conversion, multi-peptide blends, GLP-1 titration dates and pen clicks, and what a vial costs per dose. Every one is educational unit conversion. No dose is ever suggested or pre-filled. A second set covers body and nutrition estimates (BMI, BMR, daily calories, body fat and calories burned), each built on a named, published equation.
Peptide math
Reconstitution, syringe units, blends, GLP-1 pens, vial supply and nasal spray concentration. All arithmetic on the numbers you enter.
Peptide Reconstitution Calculator
Vial size + BAC water + target → exact syringe units.
Open calculatorPeptide Blend Calculator
Multi-compound stacks → per-peptide syringe units.
Open calculatorGLP-1 Titration Schedule
Manufacturer schedule mapped to your dates.
Open calculatorGLP-1 Pen Click Charts
What a click table means + the pen mechanics.
Open calculatorVial Longevity & Cost
Doses, weeks, and cost per dose per vial.
Open calculatorPeptide mcg → Units Converter
Vial + water → convert any mcg amount to U-100 syringe units.
Open calculatormcg to mg Converter
Convert between ng, mcg, mg and g instantly.
Open calculatormg to IU Converter (HGH)
Somatropin milligrams ↔ international units.
Open calculatorBAC Water Calculator
Pick a target concentration → how much water to add.
Open calculatorPeptide Supply Calculator
Your amount, schedule and duration → total needed and whole vials per size.
Open calculatorNasal Spray Concentration Calculator
Powder, liquid and pump volume → amount per spray and sprays per bottle.
Open calculatorBody and nutrition
BMI, BMR, daily calories, body fat and calories burned, each built on a named, published equation or reference table.
BMI Calculator
Height and weight → BMI with the WHO adult category.
Open calculatorBMR Calculator
Mifflin-St Jeor, revised Harris-Benedict and Katch-McArdle side by side.
Open calculatorCalorie Calculator (TDEE)
BMR × activity multiplier → estimated maintenance calories.
Open calculatorBody Fat Calculator (U.S. Navy Method)
Neck, waist, hips and height → body fat %, fat mass and lean mass.
Open calculatorCalories Burned Calculator
Activity, weight and time → calories, using 2024 Compendium MET values.
Open calculatorPeptide reconstitution chart: micrograms per unit
How much peptide one unit on a U-100 insulin syringe holds, for common vial sizes and water volumes. Find your vial down the side and your water across the top. This is a concentration chart, not a dosing chart. Going the other way, from an amount to units? See the mcg to units chart.
| Vial | 1 mL water | 2 mL water | 3 mL water |
|---|---|---|---|
| 2 mg | 20 mcg | 10 mcg | 6.7 mcg |
| 5 mg | 50 mcg | 25 mcg | 16.7 mcg |
| 10 mg | 100 mcg | 50 mcg | 33.3 mcg |
| 15 mg | 150 mcg | 75 mcg | 50 mcg |
| 20 mg | 200 mcg | 100 mcg | 66.7 mcg |
How does peptide reconstitution math work?
- Convert the vial to micrograms. Multiply milligrams by 1,000. A 10 mg vial holds 10,000 mcg.
- Divide by the water. 10,000 mcg in 2 mL is 5,000 mcg per mL. That is your concentration, and it is fixed once the vial is mixed.
- Convert to syringe units. A U-100 insulin syringe has 100 units per mL, so divide the concentration by 100. 5,000 mcg per mL is 50 mcg per unit.
- Divide any amount by the per-unit figure. The number of units for an amount is that amount in mcg divided by mcg per unit. The calculators do all four steps from your own numbers.
Reconstitution calculator by peptide
Each compound page starts from the vial sizes that compound is actually sold in, with a concentration table for each and the studies behind it.
Peptide calculator FAQ
How do you calculate peptide reconstitution?
Divide the amount of peptide in the vial by the volume of bacteriostatic water you add to get the concentration. A 5 mg vial (5,000 mcg) mixed with 2 mL of water is 2,500 mcg per mL. On a U-100 insulin syringe, 1 mL is 100 units, so each unit holds 2,500 divided by 100, which is 25 mcg.
How many units is a given amount of peptide?
Divide the amount you want to measure, in micrograms, by the micrograms per unit of your mix. At 25 mcg per unit, 250 mcg is 10 units. The number depends entirely on how much water went into the vial, which is why a calculator that starts from your own vial and water is more reliable than a fixed chart.
How much bacteriostatic water should I add to a peptide vial?
There is no single correct amount. More water makes a weaker solution, so each unit holds less peptide and small amounts are easier to measure on the syringe scale. Less water makes a stronger solution. The table on this page shows the resulting concentration for common vial sizes and volumes. Choosing an amount to take is a decision for you and a licensed clinician.
What is the difference between mcg, mg and IU?
A milligram (mg) is 1,000 micrograms (mcg). International units (IU) measure biological activity rather than mass, and the conversion differs by substance, so there is no universal mg to IU factor. Growth hormone is commonly converted at about 3 IU per mg; the mg to IU converter lets you set the factor yourself.
Do these calculators recommend a dose?
No. Every calculator converts numbers you enter: vial size, water volume and the amount you specify. Nothing is suggested or pre-filled as a target, and nothing here is medical advice.
Looking for reference data rather than arithmetic? The peptide tools cover FDA status, published half-lives, clearance estimates and storage.
Doing this every week? PepCue saves your vials, runs the draw math automatically, and keeps a provider-ready record. Free on iPhone and Android.