11 free tools
Science & Laboratories tools built for real work
Laboratory calculators and converters for solutions, molecular quantities, centrifugation, qPCR, calibration and reagent planning. Every tool is designed to expose its inputs and outputs clearly instead of hiding the logic behind a vague score.
∑Calibration Curve CalculatorFit a linear analytical calibration curve from concentration-response pairs, calculate slope, intercept and R², and estimate an unknown concentration.→∑Cell Seeding Density CalculatorCalculate total cells and suspension volume required from vessel surface area, target seeding density, stock concentration and viability.→∑Dilution CalculatorCalculate stock solution volume, diluent volume and dilution factor using C1V1 = C2V2.→∑Molarity CalculatorCalculate molarity from solute mass, molecular weight and final volume, or calculate required mass for a target molarity.→∑Molecular Weight CalculatorCalculate molecular or formula weight from a chemical formula, including parentheses and hydrate-dot notation for common elements.→∑Optical Density Dilution CalculatorCalculate sample and diluent volumes needed to dilute a culture or sample from a measured optical density to a target OD.→∑PCR Master Mix CalculatorScale PCR master mix, primers and water across reactions with overage, using C1V1=C2V2 for primer volume and keeping template separate.→∑RCF ↔ RPM ConverterConvert centrifuge speed between RPM and relative centrifugal force using the standard radius-based RCF formula.→∑Reagent Scaling CalculatorScale laboratory recipe component amounts from an original final volume to a new target volume while preserving component ratios.→∑Scientific Unit ConverterConvert common laboratory length, mass, volume, temperature and molar concentration units using dimension-safe SI relationships.→∑qPCR Efficiency CalculatorCalculate qPCR amplification efficiency from standard-curve slope and review fold amplification, R² context and deviation from ideal 100% efficiency.→
Why ToolboxKart Science & Laboratories tools?
Fast interfaces, plain-language explanations, mobile-friendly layouts and no unnecessary account wall for the utilities in this release.
Tool first
The working interface appears before long-form SEO content, so you can finish the task quickly.
Transparent logic
Calculators disclose formulas or assumptions where they matter, and analyzers avoid pretending subjective checks are scientific facts.
Reusable results
Copyable output and clean formatting are included where they improve the workflow.