Molecular weight

A dilution calculator answers the most common question in any laboratory: how much of a concentrated stock do I take,

A serial dilution calculator plans a chain of dilutions in which each tube is made from the one before it,

A solution preparation calculator converts the concentration written in a protocol into the number that matters at the balance: how

A w/v solution calculator works with the percent weight-per-volume unit that pharmacy, nursing, microbiology and most teaching laboratories use every

An ionic strength calculator evaluates I = ½ Σ cizi² — the charge-weighted sum over every ion in a solution

An osmolarity calculator converts the concentration of a solution into the number of osmotically active particles it contains per litre

A peptide reconstitution calculator turns the milligrams printed on a lyophilised vial into the millilitres of solvent that give the

A stock solution calculator plans the concentrated solutions a laboratory keeps on the shelf — 1 M Tris, 5 M

A Beer Lambert law calculator solves A = εlc — absorbance equals molar absorptivity times path length times concentration —

A protein concentration A280 calculator converts the absorbance of a protein solution at 280 nm into milligrams per millilitre and