Science Hub
Science Calculators and Lab Tools
Start here for Calcorium's chemistry and molecular biology calculators, plus practical guides for solution preparation and lab planning.
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Guides2 guides
Molecular Biology8 live
A280 Protein Concentration Calculator
Calculate protein concentration from A280 absorbance using an extinction coefficient, path length, dilution factor, and molecular mass.
Buffer and Solution Recipes
A collection of common lab buffer and solution recipes — TE, TAE, TBE, PBS, TBS, TBST, SSC, SSPE, HEPES, and more — with concentrations and preparation steps.
DNA & RNA Reverse Complement Tool
Reverse, complement, or reverse-complement DNA and RNA sequences for PCR primers, cloning, and sequence analysis.
FASTA Formatter and Sequence Cleaner
Clean, validate, reformat, convert, and print DNA, RNA, protein, and multi-FASTA sequences privately in your browser.
Nucleic Acid Mass Calculator
Convert DNA or RNA mass, moles, and molecule count using sequence composition or a length-based estimate.
Protein Molarity Calculator
Convert between protein mass concentration and molar concentration, or between protein mass, moles, and molecule count.
Protein Properties Calculator
Calculate protein pI, molecular weight, charge, amino acid percentages, aromaticity, GRAVY, and A280 extinction coefficients.
Protein Standard Curve Calculator
Fit a BCA, Bradford, or Lowry protein assay standard curve with blank correction, replicate means, and unknown-sample interpolation.
Chemistry5 live
Henderson-Hasselbalch Equation Calculator
Calculate buffer pH, the required conjugate base-to-acid ratio, and theoretical preparation amounts for a target pH.
Interactive Periodic Table
Explore all 118 elements by name, symbol, atomic number, category, group, period, block, phase, and atomic weight.
Serial Dilution Calculator
Plan a dilution series with tube concentrations, transfer volumes, diluent volumes, and a printable bench protocol.
Solution Dilution Calculator
Five dilution scenarios in one tool: C1V1=C2V2, stock spikes, back dilution, exact final volume, and mixing two solutions.
Solution Molarity Calculator
Calculate molarity, required mass, final volume, or convert between % w/v and molarity for general solutions.
One hub for chemistry and biology
Use the Science hub to move between chemistry calculators for solutions and dilution, molecular biology calculators for protein and nucleic acid work, and guides that support day-to-day lab planning.