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Lab Tools & Calculators
Free calculators for solution preparation, molecular biology, protein work, chromatography, and general lab math.
Solution Preparation
Mass / Molarity / Volume Calculator
Solve for mass, molarity, or volume given molecular weight.
Solution Dilution Calculator
Solve C1V1 = C2V2 for any one of four values.
Percent Solution ↔ Molarity Converter
Convert between %w/v and molar concentration.
Acid & Base Normality/Molarity Calculator
Look up molarity/normality of common concentrated reagents.
Buffer Calculator
Calculate component masses for common pH buffer systems.
Molecular Biology
DNA/RNA Concentration & Purity Calculator
Nucleic acid concentration and A260/A280 purity from absorbance.
Oligo MW & Extinction Coefficient Calculator
Estimate oligo molecular weight and extinction coefficient from sequence.
Primer Tm Calculator
Estimate primer melting temperature (Wallace rule / salt-adjusted).
Ligation Molar Ratio Calculator
Insert mass needed for a target insert:vector molar ratio.
