No-account bench tools
Free, private lab calculators with unit-aware results, formulas, preparation instructions, and scientific guardrails.
Calculations run locally in your browser. No account required.
Review calculator formulas, assumptions, and scientific sources.
Prepare solutions, plan dilutions, convert laboratory units, and choose or formulate a buffer. Start with Molarity when solving mass, concentration, or volume; use the Molarity ↔ Mass Concentration Converter when molecular weight connects molar and mass-based units.
Featured calculator
Choose a buffer, target pH, concentration, volume, temperature, and preparation method. Generate solid masses, stock volumes, or titration guidance—with warnings when a requested stock plan is impossible.
Build a buffer recipe
Core solution tool
Solve mass, concentration, or volume for solution preparation with unit-aware inputs.
Calculate solution molarity →Use C1V1 = C2V2 to calculate stock volume, diluent, and a bench-ready instruction.
Open calculator →Core solution tool
Use molecular weight to convert between molar concentration and ng/mL, µg/mL, or mg/mL, or convert compatible units directly.
Convert molarity and mass concentration →Compare classical and Good's buffer useful pH ranges, then continue to a preparation recipe.
Explore pH ranges →Move from dried oligos, mass, and molar amount to practical stocks and molecular-copy records.
Resuspend a dried DNA or RNA oligo and prepare a connected lower-concentration working stock.
Plan oligo stocks →Estimate molecular weight, copies per volume, total copies, and an optional target-copy dilution.
Calculate molecular copies →Convert DNA or RNA mass and moles, calculate molecules, and add optional molarity.
Convert mass and moles →Plan generic insert and vector stoichiometry before following the validated ligation protocol for your reagents.
Calculate insert mass, vector and insert volumes, common molar ratios, and reaction capacity.
Plan a ligation →Save recipes, build timed protocols, and run them on iPhone, iPad, and Apple Watch with RayCrest Lab Calculator.
Continue from lab calculations into plasmid, primer, sequence, cloning, and protein workflows on Mac.
