# Molarity Dilution C1V1 Calculator Solve C1V1=C2V2 dilutions, stock-to-working recipes, and simple serial dilution plans > Canonical page: https://elysiatools.com/en/tools/molarity-dilution-c1v1-calc - **Category:** Math & Numbers - **Keywords:** molarity, dilution, c1v1, chemistry, lab ## Overview Computes stock and diluent volumes for one-step dilutions and suggests a serial plan when you need to bridge a large concentration gap. ## Inputs - **Stock Concentration** (number) - **Target Concentration** (number) - **Final Volume** (number) - **Preferred Step Factor** (number) ## When to use - When preparing a specific volume of a working solution from a highly concentrated stock solution. - When the concentration gap between stock and target is too large for a single-step pipetting action, requiring a serial dilution plan. - When calculating the exact volume of buffer or solvent needed to dilute chemical reagents or biological samples. ## How it works - Enter your starting stock concentration and your desired target concentration. - Input the final volume of the working solution you need to prepare. - Optionally set a preferred step factor to guide the generation of a serial dilution plan. - Submit the values to instantly calculate the required stock volume, diluent volume, and dilution factors. ## Use cases - Preparing standard calibration curves for spectrophotometry or chromatography. - Diluting concentrated stock buffers to working concentrations for biological assays. - Creating serial dilutions of drug compounds for in vitro cell culture testing. ## Frequently asked questions ### What formula does this calculator use? It uses the standard dilution equation C1V1 = C2V2, where C represents concentration and V represents volume. ### Can I use different units for concentration and volume? Yes, as long as you keep the units consistent across the input fields (e.g., if stock is in M, target must be in M). ### What is a serial dilution plan? It is a step-by-step series of dilutions used when the target concentration is too low to measure accurately in a single step. ### What does the preferred step factor do? It defines the dilution ratio per step (e.g., 10 for a 1:10 dilution) when generating a multi-step serial dilution plan. ### How does the calculator determine the diluent volume? It subtracts the calculated stock volume (V1) from the final target volume (V2) to find the required volume of solvent. ## Related tools - [Gas Law Calculator](https://elysiatools.com/en/tools/gas-law-calculator): Solve pressure, volume, temperature, or moles with the Ideal Gas Law (PV=nRT) or Combined Gas Law; also gas density and molar mass. - [Lever Mechanical Advantage Calculator](https://elysiatools.com/en/tools/lever-mechanical-advantage): Calculate the mechanical advantage of a lever and its output force. MA = L_in / L_out, and by moment balance F_out = F_in · MA. 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