BenchCalc

BenchCalc is an offline biology calculator, biochemistry calculator, and laboratory science companion for researchers and students. 55 science tools, 414 glossary terms, 13 protocols, 7 troubleshooting wizards, 9 reference tables, and 7 science games - fully offline. No ads, no tracking.

CALCULATORS - 55 TOOLS
Molecular biology calculator suite: DNA molarity from mass or A260, primer Tm with nearest-neighbour prediction, primer pair comparison and dimer checking, primer resuspension and working stock dilution. Agarose gel calculator with TAE/TBE buffer selection, stain volumes, and percentage guide.

Protein calculator tools: molecular weight from amino acid sequence, Bradford assay and BCA assay with standard curve, Beer-Lambert A280 protein concentration, isoelectric point calculator with charge-vs-pH curve, enzyme unit converter (U/mg, kcat, nmol/min/mg). PAGE gel calculator for SDS-PAGE, native, and denaturing gels.

Chemistry and solution calculators: C1V1=C2V2 dilution calculator, serial dilution planner, molarity calculator, percent solutions (w/v, v/v, w/w), normality calculator, buffer preparation with Henderson-Hasselbalch, multi-solute buffer builder from the reagent database, resuspension calculator.

Laboratory tools: cell counting, centrifuge RCF/RPM converter, doubling time calculator, radioactive decay with preset isotopes and decay curve. PCR master mix with enzyme presets. Restriction digest with buffer compatibility. DNA/RNA sequence translator with 6-frame ORF analysis and feature annotation. Ligation calculator. Lab timer with simultaneous countdowns, 28 presets, and background notifications. Unit converter (femto to peta). QuickCalc with expression history.

TROUBLESHOOTING WIZARDS
7 interactive diagnostic wizards for biology and biochemistry experiments: Cloning, PCR, Restriction Digest, Agarose Gels, Protein Expression, Protein Purification, and SDS-PAGE. 87 questions and 252 solutions with real gel images. Save, resume, or share your diagnosis.

BENCH GUIDE
414 biology and biochemistry glossary terms across 10 categories with molecular structure rendering and cross-linked navigation. 91 educational entries from foundations of science through physical chemistry, thermodynamics, biochemistry, enzyme kinetics, structural biology, and scientific writing. 20 laboratory safety guides with handling, spill response, and first aid. 45 practical lab tips.

PROTOCOLS
13 step-through laboratory protocols: cloning design, cloning practical, miniprep, ethanol precipitation, gel extraction, PCR cleanup, restriction digest, ligation, heat shock transformation, E. coli growth/harvest, affinity purification, column maintenance, inclusion body purification. Checklist and focus modes. Cross-linked to troubleshooting wizards.

REFERENCE TABLES
20 amino acids with structures, MW, pI, pKa, and charge display. 5 nucleotides with IUPAC codes. 64 codons. 132 restriction enzymes with methylation, star activity, buffer compatibility. 350+ laboratory reagents with MW, CAS, working concentrations, hazards, and LD50 data. 20 antibiotics. 15 scalable media/buffer recipes. 60 fluorophores with Ex/Em and laser line matching. 13 gel ladders (6 protein, 7 DNA) with band sizes and loading volumes.

GAMES & QUIZZES
Speed Runs for codons, amino acid codes, chemical formulas, and restriction sites. 20 rounds, timed, best scores saved. Nucleotide Memory with four difficulty modes. Restriction Site Snap with Quick Play, Expedition mode across 132 enzymes, and Multi-Strand modes. Science Quiz with 75 questions across 5 topics. Leaderboards with gold, silver, and bronze.

FEATURES
Dark/light themes with auto mode. Three text sizes. Favourites and category filtering. Chemical structure rendering. Cross-calculator clipboard. Smart keypad. Haptic feedback. Backup and restore. Share and export. Tablet and landscape support. Fully offline. No account, no data collected.

Built by a scientist for scientists. One purchase, everything included.