Peptide Blend
Calculator
Reconstitute two to four peptides in one vial, then see the exact draw — and the delivered micrograms of every component in that draw. The blend math a single-peptide reconstitution calculator can’t do.
Your blend
Your dose
Draw to
= 0.100 mL on the syringe
Delivered this injection
Vial reference
How this works
Methodology reviewed July 2026In a blend, two to four peptides share one vial and one water volume, so each component has its own concentration equal to its milligrams divided by the shared bacteriostatic water in mL. A single draw pulls every component along in the same volume, at a fixed ratio you can't change, so you can only target one component's dose freely. Pick that anchor, divide its target dose (in mg) by its concentration to get the draw volume, then multiply each component's concentration by that volume to reveal how many micrograms of every peptide you actually deliver in that one injection — the whole point a single-peptide calculator can't do. Doses per vial is the shared water volume divided by the draw volume, since every component depletes in proportion to volume withdrawn.
concentration_i [mg/mL] = component_i_mg / shared_bac_water_mL
# Dose-by-component mode (anchor = component a):
draw_volume_mL = anchor_target_mcg / 1000 / concentration_a
insulin_units (U-100) = draw_volume_mL × 100
# Dose-by-volume mode:
draw_volume_mL = insulin_units / 100
# Delivered per component, every injection:
delivered_i_mcg = draw_volume_mL × concentration_i × 1000
total_concentration = (Σ component_i_mg) / shared_bac_water_mL
doses_per_vial = shared_bac_water_mL / draw_volume_mL
Each component's amount (mg) · Shared bacteriostatic water (mL) · Anchor component · Anchor target dose (mcg) or volume to draw (units) · Syringe size
Draw volume (mL) · Insulin-syringe units · Delivered micrograms of every component · Total concentration (mg/mL) · Doses per vial
- All components dissolve in and share a single bacteriostatic water volume in one vial.
- Doses read on a standard U-100 insulin syringe, where 100 units equal 1 mL.
- Every component is drawn together in a fixed ratio set at mixing time; a single draw delivers all of them proportionally to their concentrations.
- Components deplete in proportion to the volume withdrawn, so one doses-per-vial figure describes the whole blend.
- Only one component can be dosed to target; the others are locked to the same draw volume and cannot be adjusted independently once mixed.
- It is unit arithmetic only and does not judge whether any component's delivered dose, or the combination itself, is safe or appropriate.
- It cannot account for peptide lost to filters, dead space, adsorption, or components with different stability or solubility in a shared vial.
- Keep the units distinct — mg for what goes in each component, mcg for what comes out per injection, mL and insulin units for the draw; the delivered-micrograms table exists so you see the real per-component dose rather than assuming.
- Combining compounds compounds the unknowns; the delivered figures are arithmetic outputs, never a recommendation that any component dose or any blend is safe to prepare or use.
- Impossible inputs are rejected — every component needs a positive mg, water and target must be positive — and a draw exceeding the syringe capacity warns you to use a larger syringe, add more water, or split the draw.
- Many research peptides are not approved for human use, and the tool does the blend math only; it does not recommend obtaining, combining, or using any peptide.
This calculator is for educational purposes only and is not medical advice, diagnosis, or treatment. Results are estimates based on published formulas and population averages — your individual values may differ. Nothing here is calculated on a server: everything runs in your browser and no data is stored or sent anywhere. Always consult a qualified clinician before making health, medication, or training decisions.