The blend calculator is built for vials that contain multiple compounds already mixed together. Because the compounds share the same solution, they cannot be separated or adjusted independently. The calculator uses ratio logic and an anchor compound to estimate how much of each compound is delivered in every draw.
What a Same-Vial Blend Is
A blended vial contains two or more compounds reconstituted together into a single solution. Once mixed, every draw pulls from that shared solution — you cannot isolate one compound or adjust its amount without affecting all others.
This is different from drawing from separate vials. With a blend, the ratio between compounds is locked at reconstitution. The calculator works within that fixed ratio to estimate what each draw delivers.
Anchor Compound Logic
Because compounds in a blend cannot be controlled independently, the calculator uses an anchor compound as the reference point. You set the target amount for the anchor, and the calculator derives the delivered amounts of all other compounds based on the blend ratio.
The anchor is typically the compound whose target amount is most important to your research entry. Changing the anchor amount changes every delivered amount proportionally — the ratio stays fixed, but the scale shifts.
How the Calculator Works
The calculator takes the total amount of each compound in the vial, the reconstitution volume, and the blend ratio. It then works backwards from your anchor target to determine the draw volume — and from that draw volume, estimates how much of each other compound is delivered.
All delivered amounts are estimations based on an assumed uniform distribution throughout the solution. The calculation assumes the compounds are evenly distributed across the full reconstituted volume.
Equal Blend Example
A 1:1 blend contains two compounds in equal amounts. The anchor sets the draw, and the second compound is delivered at the same ratio.
Vial contents: BPC-157 10 mg | TB-500 10 mg
Blend ratio: 1:1
Reconstitution volume: 2 mL
Anchor compound: BPC-157 | Anchor target: 500 mcg
BPC-157 concentration: 5 mg/mL (10 mg ÷ 2 mL)
Draw volume for 500 mcg BPC-157: 0.10 mL → 10 units
TB-500 concentration: 5 mg/mL (10 mg ÷ 2 mL)
Delivered TB-500 in same 0.10 mL draw: 500 mcg
In a 1:1 ratio with equal vial amounts, both compounds deliver the same amount per draw.
Uneven Blend Example
Uneven blends contain compounds at different amounts, which produces different delivered amounts even within the same draw volume.
Vial contents: BPC-157 5 mg | TB-500 10 mg | GHK-Cu 20 mg
Blend ratio: 1:2:4
Reconstitution volume: 2 mL
Anchor compound: BPC-157 | Anchor target: 500 mcg
BPC-157 concentration: 2.5 mg/mL (5 mg ÷ 2 mL)
Draw volume for 500 mcg BPC-157: 0.20 mL → 20 units
TB-500 concentration: 5 mg/mL (10 mg ÷ 2 mL)
Delivered TB-500 in same 0.20 mL draw: 1000 mcg (1 mg)
GHK-Cu concentration: 10 mg/mL (20 mg ÷ 2 mL)
Delivered GHK-Cu in same 0.20 mL draw: 2000 mcg (2 mg)
The draw volume is set entirely by the anchor. Every other compound's delivered amount is a function of its own concentration within that same volume.
Why Changing the Anchor Changes Everything
The anchor target determines the draw volume. Because all compounds share the same draw, increasing or decreasing the anchor target scales the delivered amounts of every other compound in direct proportion.
If you need to adjust a non-anchor compound's delivered amount, the only way to do so is to change the blend ratio at reconstitution — not through the calculator after the fact.
BAC Water and Blend Ratios
Adding more or less BAC water changes the concentration of the entire solution and affects draw volume — but it does not change the ratio between compounds. The ratio is set by how much of each compound went into the vial. BAC water only determines how concentrated that fixed ratio is per mL.
Quick Reference
Blend vials contain all compounds in a single shared solution
Compounds cannot be separated or independently adjusted after mixing
Anchor compound sets the draw volume — all other amounts are derived
Changing the anchor target scales all delivered amounts proportionally
BAC water affects draw size but does not change blend ratios
Common Mistakes
All compounds share one solution. The only control point is the anchor target. Ratio changes require re-blending at reconstitution.
Equal vial amounts with the same reconstitution volume do produce equal concentrations and equal delivery — but only in a true 1:1 ratio. Any imbalance in vial amounts changes this.
BAC water changes concentration uniformly across all compounds. Ratios remain fixed regardless of reconstitution volume.
Delivered amounts are estimates based on uniform distribution. Real-world variation in mixing uniformity may affect actual delivery.
This guide is for research-use calculator education only. It does not provide medical advice, treatment recommendations, or personalized dosing instructions.