BenchCalc

Feedings LTD

About this app

BenchCalc is a pocket reference and calculator built for scientists at the bench. 35 tools across 8 categories — no internet required, no ads, no tracking.

CALCULATORS
Nucleic acid mass/moles, A260 concentration, Tm prediction with primer pair comparison and dimer checking. Protein molecular weight from sequence, Bradford/BCA assay with standard curve or quick estimate mode. Dilution, serial dilution, molarity, Beer-Lambert A280. Buffer preparation, percent solutions, resuspension. Cell counting and seeding, centrifuge g/RPM conversion, doubling time. PCR master mix with enzyme presets**, template DNA concentration helper,** and 10% overage. Restriction digest calculator — select up to 3 enzymes from the built-in database with automatic buffer compatibility checking, methylation and star activity warnings, and save/recall setups. Tap any enzyme in the reference to jump straight to a digest. General reaction mix — define custom components with C1V1=C2V2 scaling. Unit converter with full SI magnitude ladder (femto to peta) across 7 categories. Quick calculator with expression history, memory, and shortcut chips to jump to other tools. Lab timer with multiple simultaneous countdown timers and 28 presets across 5 categories — timers keep running while you use other tools.

PROTOCOLS
10 step-through lab protocols: miniprep, ethanol precipitation, gel extraction, PCR cleanup, restriction digest, ligation, heat shock transformation, E. coli growth & harvest, affinity column purification, and column maintenance. Each protocol has checklist and focus modes, duration badges, volume chips, warnings, and tips. Progress is saved per protocol.

REFERENCE TABLES
20 amino acids with chemical structures, MW, pI, and polarity. 5 nucleotide bases with structures and IUPAC degenerate codes. 64 codons — standard genetic code, searchable. 132 restriction enzymes — Type II, IIS, nicking, and homing endonucleases with methylation sensitivity, star activity warnings, buffer info, and compatible end matching. Filter by type, overhang, or sort by name, site length, or buffer. 284 common lab reagents — MW, formula, CAS, working concentrations, storage temperature, solubility, and hazard warnings. Sort by name or molecular weight.

FEATURES
Dark and light themes with auto mode. Three text sizes. Favourites and category filtering. Chemical structure rendering for amino acids and nucleotides. Primer dimer analysis with 3' complementarity scoring. Protein concentration tools including Bradford/BCA with adjustable correction factor. Cross-calculator clipboard — copy a result from one tool and paste it into another. QuickCalc accessible from any calculator header. Smart custom keypad with numeric, nucleotide, and amino acid modes. Haptic feedback throughout. Works completely offline. No account required, no data collected.

Built by a scientist, for scientists. One purchase, everything included.
Please contact support if you find any issues, or have suggestions!

What’s new

V2.5.0
- NEW Restriction Digest calculator
- improvements & fixes

V2.0.0
- NEW PCR / reaction calculator table
- NEW protocols
- NEW in-app calculator wired to other tools
- extensive general improvements

Please share your feedback on requests and improvements!