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Laboratory Calculators

The laboratory bench runs on a handful of concentration calculations, and getting them wrong wastes reagents and ruins experiments. This collection covers solution preparation from first principles — every tool shows its formula, works through real numbers, and cites where the method comes from.

Molarity & Concentration

Molarity is the workhorse concentration unit: moles of solute per litre of final solution. The molarity calculator solves in four directions, so you can go from a weighed mass to a concentration, or backwards from a target molarity to the mass you need to weigh. If you want the concept first, what is molarity explains the definition, the M vs mM relationship, and why temperature changes the answer.

Dilution

Dilution tools are coming next in this category: a C1V1 = C2V2 dilution calculator, a serial dilution planner and a stock solution calculator. Until they ship, the how to calculate molarity guide covers the mole and volume conversions that every dilution depends on.

Solution Preparation

Preparing a stock solution means converting a target concentration and volume into a mass to weigh, then dissolving and bringing to volume. The molarity calculator’s mass mode handles the core of this; a dedicated stock solution calculator with purity correction is on the roadmap.

Unit Conversion

Concentration work lives or dies on units. The calculators here convert between mol/L, mmol/L, µM and nM, and between g, mg, µg and ng, so you can match whatever unit your protocol uses without doing the arithmetic by hand.

More laboratory calculators (dilution, serial dilution, C1V1, molar mass, stock solution, percent solution, PPM) are in active development and will appear here as they pass our scientific QA.