Calculator Directory
Molecular Biology Calculators
Practical calculators for protein, DNA, and RNA work.
Available tools6 live
Protein Molarity Calculator
Convert between mass and moles for proteins. Includes weight↔mole, molar concentration, and molecule count.
Protein Properties Calculator
Calculate protein pI, molecular weight, charge, amino acid percentages, aromaticity, GRAVY, and A280 extinction coefficients.
DNA & RNA Reverse Complement Tool
Reverse, complement, or reverse-complement DNA and RNA sequences, including IUPAC codes and multi-record FASTA.
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.
Reagent and Buffer 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.
Biology tools for everyday lab planning
These calculators are built for common molecular biology tasks: converting between mass and molar amount, estimating molecular weight, checking DNA sequence orientation, cleaning and formatting FASTA records, and planning nucleic acid inputs for PCR, cloning, sequencing, and assay work.