Comparison
How we compare to other peptide calculators
Feature-by-feature matrix versus Particle Peptides, Cellgenic, Omnicalculator, Bachem and RetatrutidePen. Marked from publicly-stated features at the time of writing; we use 'unknown' rather than guessing.
| Feature | This site | Particle Peptides | Cellgenic | Omnicalculator | Bachem | RetatrutidePen |
|---|---|---|---|---|---|---|
| Core dosing | ||||||
Reconstitution calculator (mg + mL → mcg/mL) Every peptide calculator on the web does this — the baseline. | ||||||
Bodyweight-scaled dosing (mcg/kg) Convert subject weight (kg or lb) into absolute mcg. | ||||||
Multiple syringe types U-100, U-50, U-30, reusable 3 mL pen, custom capacity/ticks | ||||||
Visual syringe with live fill indicator | ✗ | |||||
Reverse mode (target ticks → dose) | ||||||
Out-of-range warnings (volume, concentration, dose) | ✗ | |||||
| Pre-mixed pens & cartridges | ||||||
300-click pen dial calculator | ||||||
Visual radial dial widget | ✗ | |||||
14 stocked pen presets (Retatrutide, Tirzepatide, Semaglutide, NAD+, GHK-Cu, L-Glutathione, KLOW, GLOW…) | ✗ | ✗ | ||||
Sortable reference table | ✗ | |||||
| Combo / blend support | ||||||
Multi-peptide blend mode (KLOW, GLOW, GOD stack, Wolverine) | ✗ | ✗ | ✗ | ✗ | ✗ | |
Per-component delivered-mass breakdown for a single draw | ✗ | ✗ | ✗ | ✗ | ✗ | |
9 pre-built combo entries in dataset | ✗ | ✗ | ✗ | ✗ | ✗ | |
| Protocol design | ||||||
Half-life / steady-state simulator with curve | ✗ | ✗ | ✗ | |||
Titration schedule builder with STEP / SURMOUNT / TRIUMPH presets | ✗ | ✗ | ✗ | ✗ | ✗ | |
Multi-row cost & supply planner with bulk-vs-single-vial | ✗ | ✗ | ✗ | ✗ | ✗ | |
Click-through deep-links between tools | ✗ | |||||
Protocol-phase simulator (induction → titration → maintenance → taper) | ✗ | ✗ | ✗ | ✗ | ✗ | |
| Stack design & safety | ||||||
Pairwise interaction checker | ✗ | ✗ | ✗ | ✗ | ✗ | |
Severity bands (caution / warning / avoid) | ✗ | ✗ | ✗ | ✗ | ✗ | |
Weekly-schedule grid for multi-peptide stacks | ✗ | ✗ | ✗ | ✗ | ✗ | |
| Sequence chemistry | ||||||
Molecular weight from amino-acid sequence | ✗ | ✗ | ✗ | ✗ | ||
Isoelectric point (pI) via bisection | ✗ | ✗ | ✗ | ✗ | ||
Net-charge-vs-pH curve | ✗ | ✗ | ✗ | ✗ | ||
Hopp & Woods hydrophilicity profile per residue | ✗ | ✗ | ✗ | ✗ | ||
Terminal modification support (acetyl / biotinyl / pyroglutamyl / amide) | ✗ | ✗ | ✗ | ✗ | ||
| Dataset & content | ||||||
40+ peptide profile pages | ✗ | ✗ | ||||
Pairwise interaction map | ✗ | ✗ | ✗ | ✗ | ✗ | |
Citations to peer-reviewed literature per peptide | ✗ | ✗ | ||||
Educational learn-section guides | ✗ | ✗ | ||||
| UX & privacy | ||||||
PDF export of every result | ✗ | |||||
Shareable URLs that restore exact inputs | ||||||
Dark mode parity site-wide | ||||||
Client-side only (no signup, no server round-trips) | ||||||
Multi-currency cost planning (£/$/€) | ✗ | ✗ | ✗ | ✗ | ✗ | |
AI-search-ready (llms.txt + JSON-LD) | ||||||
Free, advertising-free | ||||||
What each tool does well
Every calculator on the matrix has a reason researchers reach for it. This is what each one is genuinely strong at — not a takedown, just an honest positioning.
ResearchPeptideCalculator.co.uk
Twelve interconnected tools, a 43-entry peptide dataset (including 9 combo blends), a pairwise interaction map, and a sequence-chemistry calculator alongside the dosing maths. Every input persists in the URL hash so plans are shareable, and every calculation runs entirely in your browser. Built for laboratory researchers who want one workspace for the full protocol lifecycle.
Particle Peptides
Clean visual syringe widget paired with a polished reconstitution UI. The single-peptide dosage flow is well-considered and approachable for first-time researchers.
Cellgenic
Solid reconstitution + dose calculator with peptide-specific defaults. Good for quick single-peptide lookups when you already know the math you want.
Omnicalculator
Part of a broader generalist calculator host — useful when you also need cooking, finance and physics tools alongside peptide reconstitution. Embeddable widgets.
Bachem
Manufacturer-grade sequence chemistry: MW, pI, hydrophobicity, charge distribution. The reference point for chemistry-first peptide work, although positioned for synthesis customers rather than research-protocol design.
RetatrutidePen
Hyper-focused on a single peptide and its pen variants. If you only ever work with Retatrutide and need the click count for one cartridge size, the focused UI is fast.
Why we built it this way
The decision points behind the matrix above were:
- Combo blends are first-class. The partner ecosystem stocks KLOW, GLOW, GOD Stack and similar pre-mixed multi-peptide vials, but every other public calculator treats them as a single mass. We treat them as a typed object with components and per-component delivered-mass math, so a single draw answer is always honest.
- The 12 tools share state. Every page reads the same peptide dataset and the same URL-hash convention; deep-links between tools pre-fill defaults. Pick a peptide on its profile page and you can jump into the dosage calculator, half-life simulator, titration builder and pen calculator without re-typing inputs.
- Privacy is structural. Nothing leaves the browser by design. No accounts, no analytics on the calculator pages, no vendor pricing stored on our servers. Share-links carry the entire plan in the URL hash, so two researchers can collaborate without us ever seeing the data.
- Disclaimers are non-negotiable. Every page (and every exported PDF) carries the laboratory / research-use-only banner. This site is not a clinic.
Quick links to every tool
- Dosage Calculator — bodyweight-scaled or absolute, with five syringe types and combo-aware math.
- Pen & Cartridge Calculator — 14 stocked pen presets with the 300-click radial dial.
- Reconstitution Calculator — the baseline mg + mL conversion.
- Stack Builder — multi-peptide weekly schedule with pairwise interaction checks.
- Interaction Checker — focused 2–5 peptide pairwise matrix.
- Protocol Simulator — induction / titration / maintenance / taper phases.
- Metabolic Estimator — BMR + TDEE + GLP-1 projection curves.
- Half-Life Calculator — steady-state simulator with accumulation factor.
- Peptide Chemistry Calculator — sequence → MW / pI / charge / hydrophilicity.
- Titration Schedule Builder — STEP / SURMOUNT / TRIUMPH ramps.
- Cost & Supply Planner — multi-row spend planner with bulk-vs-single-vial comparison.
- PDF Protocol Generator — branded printable protocol document.