LabTools

Free online laboratory tools

Lab tools that just work, right in your browser.

Fast, no-install calculators and analysers for molecular biology — primer design, sequence analysis, restriction mapping, unit conversions and more.

Popular tools

NEBcutter V3.0 Restriction enzyme site finder Tm Calculator PCR primer melting temperature Molarity Calculator Mass to weigh from MW, conc & volume Dilution Calculator C1V1 = C2V2 stock dilutions Reverse complement Reverse, complement & reverse-complement Oligo analyzer Length, GC%, Tm and molecular weight DNA → protein Translate in any of the six frames RPM ↔ g Centrifuge speed to RCF converter OD600 → cells Bacterial cell number from OD600 Nucleic acid conc. DNA/RNA concentration from A260 Tm of short primers Wallace rule for oligos under 14 bp

Guides

How to design PCR primers Length, GC, Tm, specificity — step by step Restriction enzyme cloning Sites, primers, ligation and verification qPCR data analysis Efficiency, reference genes and ΔΔCq DNA & RNA quantification A260, purity ratios and fluorometry

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