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.
Chemistry10 live
C1V1 = C2V2 Dilution Calculator
Calculate initial and final stock concentrations and volumes using the C1V1 = C2V2 dilution formula. Free, instant client-side chemistry tool.
Dilute Back Down Calculator
Determine how much diluent to add to lower an existing solution to a target concentration without wasting stock.
Dilute to Exact Final Volume Calculator
Calculate stock aliquot and diluent volume required to reach an exact final volume at a specific target concentration.
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.
Mix Two Solutions Calculator
Calculate the resulting final concentration when mixing two solutions of different concentrations.
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.
Solution Spiking Calculator
Calculate the exact spike volume or stock concentration needed to adjust an existing solution's concentration.
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.