Mixing Ratio Calculator

A mixing ratio compares the amounts of two components in a mixture. Depending on the application, those amounts may be measured by mass, moles, or volume. A ratio of 1 : 4 means one part of component 1 is combined with four equal-basis parts of component 2. The total contains five parts, so component 1 accounts for 20 percent and component 2 accounts for 80 percent on the selected basis. This calculator simplifies the entered amounts to a whole-number ratio and also reports both percentages. The chosen basis matters. A mass ratio compares quantities such as grams or kilograms and is useful for formulations, solids, and gravimetric preparation. A mole ratio compares numbers of molecules or formula units and is central to stoichiometry and gas composition. A volume ratio compares compatible volumes and is often used for liquid blends or gases at the same temperature and pressure. The same numerical amounts can represent different physical compositions when the basis changes, so always state the ratio type with the result. Both component entries must share compatible units. For example, entering 250 g and 750 g gives the same mass ratio as entering 0.25 kg and 0.75 kg. Do not directly combine 250 g with 0.75 kg without converting one value first. Likewise, a volume ratio does not automatically equal a mass ratio because substances usually have different densities. Converting between those bases requires density or molar-mass information that is outside this simple ratio calculation. Mixing ratios appear in reagent preparation, solvent blends, resin and hardener instructions, gas mixtures, fertilizer recipes, and process feeds. Before scaling a recipe, confirm whether the specified ratio is component 1 to component 2 or the reverse. Percentage is calculated from each amount divided by their sum, while the simplified ratio is found by dividing both quantities by a common factor. The calculator preserves ratios for common decimal inputs by scaling them before reduction. For safety-sensitive chemical preparation, also consider purity, concentration, compatibility, heat release, mixing order, and the manufacturer's procedure; a mathematically correct ratio alone does not guarantee a safe formulation.