Transparent math. Deterministic protocols. Works offline.

C₁V₁ = C₂V₂ is simple. Getting it right isn't.

10 mM to 10 nM is a million-fold dilution — not trivial in practice. LabCalcPro picks pipettes, plans 2- or 3-stage serial dilutions, rounds to instrument resolution, and produces numbered, bench-ready steps. Add molarity↔mass and saved solutes for solution prep; follow with confidence.

Download on the App Store See how it works

Free download · 3-day trial · $5.99 lifetime unlock

No subscription. No account required. Works offline.

LabCalcPro calculator input screen with concentration, volume, and unit selectors

Works offline

All calculations run locally on your device. No internet required, no servers involved.

Your data stays local

No accounts, no cloud sync, no tracking, no ads. Saved calculations never leave your phone.

Transparent math

Expand the math section to see every formula, unit conversion, and rounding step applied.

Features

Built for the bench.

Purpose-built tools for laboratory solution preparation — from quick C1V1 calculations to multi-step serial dilutions.

Instant Calculations

Enter your stock concentration, target, and final volume. Results update as you type — no "Calculate" button needed.

Step-by-Step Protocols

Get clear, numbered instructions: which pipette, how much to transfer, how much solvent to add. Ready to follow at the bench.

Serial Dilution Support

When a single step won't work, LabCalcPro automatically plans 2- or 3-stage serial dilutions (up to 10¹⁰× and beyond) with named intermediates.

Show Your Math

Every calculation is fully transparent. Expand the math section to see the formulas, unit conversions, and rounding applied.

Pipette-Aware Rounding

Configure your lab's pipettes (P20, P200, P1000) in Settings; toggle which ones are in use per calculation. Volumes rounded to your pipettes' resolution.

Save & Share

Save calculations and saved solutes (MW + name) for quick recall. Export steps as plain text to share with colleagues via any messaging app.

How it works

Three inputs. Full protocol.

Read the full technical deep dive →

Enter what you want

Target concentration and final volume.

Enter what you have

Stock concentration and solvent.

Get your protocol

Numbered steps, pipette selections, warnings, and full math — instantly.

Bench Mode

Take it to the bench.

Tap the flask icon to enter Bench Mode. Your screen stays awake, inputs and math collapse, and your protocol is displayed in large, easy-to-read text. Just prop up your phone and follow the steps.

Screen stays awake while you work
Large text optimized for reading at arm's length
Protocol assumptions footer for traceability
One tap to return to full view

Bench Mode with large text protocol steps and warnings for easy reading at arm's length

App Preview

See it in action.

Calculator

Filled Inputs

Serial dilution protocol steps with expanded Show Math section showing full formulas

Steps & Math

Bench Mode

Saved Calculation

Your data stays on your device.

LabCalcPro performs all calculations locally on your device. No accounts. No cloud sync. No tracking. No ads.

Your saved calculations are stored in a local database that never leaves your phone.

This app is a calculation and planning utility for laboratory solution preparation. It does not provide medical, clinical, safety, or experimental technique guidance.

Stop second-guessing your dilutions.

Get step-by-step protocols with transparent math — in seconds.

Download on the App Store