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Biology
(7)DNA Reverse Complement
Compute the reverse complement of a DNA sequence (A↔T, C↔G) instantly.
Open tool →GC Content Calculator
Calculate the GC content percentage and base composition of a DNA sequence.
Open tool →DNA Base Counter
Count the occurrence of each nucleotide (A, T, C, G) in a DNA sequence.
Open tool →DNA Sequence Cleaner
Clean a DNA sequence by removing whitespace, numbers, and non-standard characters.
Open tool →DNA to RNA Transcription
Transcribe a DNA sequence into RNA by replacing thymine with uracil (T→U).
Open tool →Cell Culture Calculator
Cell counting (hemocytometer), seeding volume, split ratio, and viability — common cell culture calculations.
Open tool →Plasmid Designer
Upload a GenBank/FASTA plasmid, draw a circular map, annotate restriction sites, and export PNG/SVG.
Open tool →Chemistry
(14)Molar Mass Calculator
Calculate the molar mass of a compound from its chemical formula (e.g. H2O, NaCl).
Open tool →Molarity Calculator
Calculate molarity from solute mass, molar mass, and solution volume.
Open tool →Dilution Calculator
Calculate dilution using the C1V1 = C2V2 formula. Solve for any variable.
Open tool →Solution Preparation Calculator
Calculate the mass of solute needed to prepare a solution of given molarity.
Open tool →Percent Solution Calculator
Calculate percent concentration (w/w, w/v, v/v) of a solution.
Open tool →Interactive Periodic Table
Browse all 118 elements. Click any element to view atomic weight, electron configuration, oxidation states, density, and melting point.
Open tool →Unit Converter
Convert between metric units for mass (g, mg, μg, ng), volume (L, mL, μL), and concentration (M, mM, μM, nM).
Open tool →Concentration Converter
Convert between mg/mL and mM (molar concentration) using molar mass.
Open tool →Formula Parser
Parse a chemical formula and view element composition, atom counts, and mass contributions.
Open tool →Chemical Equation Balancer
Balance a chemical equation automatically. Find stoichiometric coefficients (e.g. H2 + O2 -> H2O).
Open tool →pH Calculator
Calculate pH from [H⁺], or from pKa for weak acids and buffers (Henderson-Hasselbalch).
Open tool →Buffer Calculator
Design a buffer solution using the Henderson-Hasselbalch equation. Compute the [A⁻]/[HA] ratio, concentrations, moles, and masses.
Open tool →Centrifuge RPM ↔ RCF Converter
Convert between centrifuge RPM and relative centrifugal force (RCF, × g) using the rotor radius.
Open tool →Serial Dilution Calculator
Calculate concentration at each step of a serial dilution. Supports dilution factor and step count, with optional per-step volume.
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