Category
laboratory calculators
Solve common laboratory problems with unit-aware steps.
Dilution Calculator
Solve any term in C₁V₁ = C₂V₂ with compatible concentration and volume units.
DNA/RNA Concentration Calculator
Convert A260 to DNA/RNA concentration and total yield; report A260/A280 and A260/A230 purity ratios.
Primer Melting Temperature Calculator
Calculate DNA primer Tm by Wallace or SantaLucia nearest-neighbor thermodynamics with salt, Mg²⁺, dNTP and primer-concentration correction.
CFU/mL Calculator
Combine replicate plates, dilution factors and plated volumes; flag countable ranges and report mean, SD and CV.
Hemocytometer Cell Count and Viability
Combine live/dead replicate chamber counts to calculate cells/mL, viability, total cells and replicate CV.