Chemistry might seem intimidating and counterintuitive at first, but it is also extremely useful. So how can you learn everything about chemistry without effort? We don’t know the answer, but we can help you solve chemistry problems faster and more efficiently thanks to our chemistry calculators. From calculating concentrations to using our stoichiometry calculator, chemical reactions calculator, or molar mass calculator, we’ve got the tools you need. You need to figure out activation energies? We’ve got you covered. Would you like to know the boiling point at different altitudes? There’s a calculator for that. You prefer vapor pressures and neutralizations? Don’t fret! We also have calculators to help you with these problems. Heck! We even have a calculator to help you understand the half-life of radioactive elements. General chemistry calculators ⚛️ Atom Calculator The atom calculator finds the number of protons, neutrons, and electrons in an atom. Atomic Mass Calculator The atomic mass calculator takes the number of protons and neutrons in an atom and displays the atomic mass in atomic mass units and kilograms. Average Atomic Mass Calculator The average atomic mass calculator determines the average atomic mass of elements based on the isotopic mass and their natural abundance. Bond Order Calculator In this bond order calculator we will show you how to find the bond order using Lewis structures, or a formula derived from the molecular orbital theory. Chemical Name Calculator Are you having trouble with finding the name of your ionic compound? Our chemical name calculator can help you with that! Effective Nuclear Charge Calculator Learn how to calculate the effect of shielding on electrons with our effective nuclear charge calculator. Electron Configuration Calculator Find the full electronic configuration and valence electrons of any periodic element using this electron configuration calculator. Electronegativity Calculator This electronegativity calculator is an efficient tool to calculate the type of bond formed between two atoms based on their electronegativities. Mass Concentration to Molar Concentration Conversion Omni Calculator’s mass concentration to molar concentration conversion tool helps you determine the molar concentration of a substance given its molar mass. Molar Mass Calculator Check how many grams are contained in 1 mole of any element or chemical compound with this molar mass calculator. Percent Composition Calculator The percent composition calculator will compute the percentage of elements by weight in a given chemical compound. Percent Ionic Character Calculator The percent ionic character calculator allows you to find the behavior of a chemical bond between any two atoms. pKa Calculator This pKa calculator helps you find the pKa from pH with the Henderson-Hasselbalch equation or with acid dissociation constant (Ka) values. Quiz: Electron Configuration Calculator Take this quiz to test your understanding of electron configuration and valence electrons. Stoichiometry calculators 🧪 AFR Calculator (Air-Fuel Ratio) The AFR calculator gives you the rate between the mass of air and the mass of fuel of a complete combustion process. Atom Economy Calculator Our atom economy calculator can help you estimate the quantity of waste in your chemical reactions. Avogadro's Number Calculator This Avogadro's number calculator will help you find the number of molecules in a mole. Empirical Formula Calculator Use our empirical formula calculator to determine the simplest whole-number formula from percent composition or mass. Grams to Moles Calculator Use this grams to moles calculator whenever you want to know the number of moles of a substance with a specific mass. Hydrogen Ion Concentration Calculator Determine the hydrogen ion concentration from pH using this hydrogen ion concentration calculator. Molality Calculator The molality calculator helps you find the molal concentration, given the number of moles of solute and the mass of the solvent. Molarity Calculator Determine solution molarity and understand molar concentration with our intuitive Molarity Calculator. Molar Mass of Gas Calculator Calculate the molar mass of a gas using the ideal gas law. Mole Calculator Need to convert between moles, molecular weight and mass? You can do it here with our mole calculator. Molecular Weight Calculator The molecular weight calculator allows you to easily calculate the mass of a given molecule. Mole Fraction Calculator The mole fraction calculator provides you with the solution to your chemical questions — using two different methods! Moles to Atoms Converter Convert the number of moles to atoms using our moles to atoms converter and learn the formula, view step-by-step examples, and understand how to apply Avogadro's number. Normality Calculator Find out the number of equivalents present per liter of solution using our normality calculator. PPM to Molarity Calculator If you need to convert ppm (parts per million) to molarity for solutions, this calculator is for you! Mixtures and solutions calculators ⚗️ Activity Coefficient Calculator The activity coefficient calculator is a tool to determine the ratio of chemical activity to the molar concentration of a substance. Alligation Calculator Our alligation calculator is a convenient tool that calculates the alligation ratios of two solutions of varying concentrations to produce a solution with an intermediate concentration. You can also add the desired volume of the solution to know the required volume of the other solutions to achieve a specific alligation ratio. Bleach Dilution Calculator Our bleach dilution calculator will tell you how much chlorine and water you need to mix together to create your desired bleach concentration. Buffer Capacity Calculator Buffer capacity calculator is a tool that helps you calculate the resistance of a buffer to pH change. Buffer pH Calculator Our buffer pH calculator will help you painlessly compute the pH of a buffer based on an acid or a base. Concentration Calculator The concentration calculator helps you to recompute concentration (molarity and percentage concentration). Dilution Factor Calculator Work out how much you are diluting something by using our dilution factor calculator. Henderson-Hasselbalch Calculator The Henderson-Hasselbalch calculator is a simple biochemical tool for assessing the pH of a buffer solution. Mass Percent Calculator The mass percent calculator finds the ratio between the mass of a mixture's component and the total mass of the mixture. Mixing Ratio Calculator The mixing ratio calculator allows you to compute the percentages of substances in a mixture and multiply their amount to find the desired volume/weight ratio. Neutralization Calculator The neutralization calculator allows you to find the normality of a solution. Percentage Concentration to Molarity Calculator With our tool, you can easily convert percentage concentration to molarity. Percent Solution Calculator The percent solution calculator helps you find the mass by volume percentage of a solution, as well as the mass percentage and the volume percentage. pH Calculator The pH calculator can determine the pH from H⁺ molar concentration, or Ka, and the concentration of a solution. Raoult's Law Calculator Our Raoult's law calculator is a convenient tool to calculate the vapor pressure of an ideal solution. You can also calculate the vapor pressure and mole fraction for a pure solvent as well. Reconstitution Calculator The reconstitution calculator evaluates the volume and mass required to reconstruct a drug by adding a liquid diluent to a dry ingredient. Saponification Value Calculator The saponification value calculator determines the saponification number of fats based on the molarity and weight of the oil. Serial Dilution Calculator This serial dilution calculator will give you all the necessary information to carry out a serial dilution. Solution Dilution Calculator The solution dilution calculator tells you how to dilute a stock solution of known concentration. TDS Calculator Use the TDS calculator to determine water's total dissolved solids from water chemistry analysis or its electrical conductivity EC. Titration Calculator Use our titration calculator to determine the molarity of your solution. Water Hardness Calculator Estimate the water hardness based on the calcium and magnesium concentration using the water hardness calculator. Chemical reactions calculators 💥 Activation Energy Calculator The activation energy calculator finds the energy required to start a chemical reaction according to the Arrhenius equation. Actual Yield Calculator Do you want to calculate how much product you are going to make in a chemical reaction? Use our actual yield calculator! Arrhenius Equation Calculator The Arrhenius equation calculator will help you find the number of successful collisions in a reaction – its rate constant. Chemical Equation Balancer Use this chemical equation balancer to quickly balance chemical reactions.

Equilibrium Constant Calculator Need some help calculating the equilibrium constant of reversible chemical reactions? Having problems with 'how to do it' and 'what do I need this for'? Click and find the answers to all of your questions! Kp Calculator The Kp calculator will give you the relationship between two equilibrium constants: Kp and Kc. Molar Ratio Calculator This molar ratio calculator will help you determine the molar ratio between the different reactants and products in a balanced chemical reaction. Net Ionic Equation Calculator The net ionic equation calculator helps you quickly convert a chemical equation into its complete ionic and net ionic forms. Percent Yield Calculator Are you carrying out a reaction? Find your reaction efficiency with our percent yield calculator. Rate Constant Calculator Our Rate Constant Calculator will compute the rate constant, the rate of the reaction or the concentration of the substance using the rate laws. Reaction Quotient Calculator Effortlessly calculate Q for the reaction and master Q in chemistry with our advanced reaction quotient calculator. Get accurate results now! Theoretical Yield Calculator Want to know how much product you are going to make in a reaction? Use the theoretical yield calculator! Chemical thermodynamics calculators 🌡️ Boiling Point Calculator If you want to know the boiling point of some most common substances at a given pressure, try our boiling point calculator. Boiling Point at Altitude Calculator The boiling point at altitude calculator finds the boiling point of water at different altitudes. Boiling Point Elevation Calculator Determine the change in boiling point of a solution using boiling point elevation calculator. Entropy Calculator Entropy calculator uses the Gibbs free energy formula, the entropy change for chemical reactions formula, and estimates the isothermal entropy change of ideal gases. Freezing Point Depression Calculator Use the freezing point depression calculator to determine the effect of adding a nonvolatile solute on the freezing point temperature of the pure solvent. Gibbs Free Energy Calculator This Gibbs free energy calculator determines whether the reaction is spontaneous or non-spontaneous. Gibbs' Phase Rule Calculator Gibbs' phase rule calculator finds the number of degrees of freedom with a known number of components and phases using the phase rule equation. Heat of Combustion Calculator Determine the heat released during the combustion process using the heat of the combustion calculator. Q10 Calculator The Q10 calculator efficiently determines the speed of reaction with temperature changes. STP Calculator (Standard Temperature and Pressure) The standard temperature and pressure calculator allows you to painlessly compute the volume and number of moles of a substance in standard conditions. Vapor Pressure Calculator The vapor pressure calculator helps you learn about phase transition, latent heat, the Clausius-Clapeyron equation and other parts of thermodynamics and chemistry. Vapor Pressure of Water Calculator With this vapor pressure of water calculator, you can find the vapor pressure at a particular temperature according to five different formulas. This calculator works for the standard 0-100 °C range as well as temperatures above 100 °C and below the freezing point. Awesome! Electrochemistry calculators 🔋 Cell EMF Calculator – Electromotive Force of a Cell Cell EMF calculator helps you calculate the electromotive force of an electrochemical cell. Electrolysis Calculator Learn the principles of electrochemistry with our Faraday's law of electrolysis calculator. Ionic Strength Calculator The ionic strength calculator is a convenient tool to help you calculate the ionic strength of a solution based on the ions present in it and their charge. Lattice Energy Calculator Use the lattice energy calculator to find the amount of energy stored within a large ionic compound. Nernst Equation Calculator The Nernst equation calculator applies the fundamental electrochemistry equation to find the reduction potential in a cell reaction. Physical chemistry calculators 🥼 Diffusion Coefficient Calculator The diffusion coefficient calculator quickly tells you the diffusion coefficient in Einstein-Smoluchowski diffusion processes. Rate of Effusion Calculator The rate of effusion calculator calculates the rate of diffusion or effusion of one gas into another based on the molar weights of the two gases. It can also give you the molar weight of a gas, based on its rate of diffusion. Half-Life Calculator Use the half-life calculator to analyze radioactive decay. Langmuir Isotherm Calculator The Langmuir isotherm calculator is a simple way to compute the fraction of the adsorbent surface covered by adsorbate, according to the Langmuir adsorption model. Osmotic Pressure Calculator The osmotic pressure calculator finds the pressure required to completely stop the osmosis process. Partial Pressure Calculator Use this partial pressure calculator to learn about four partial pressure formulas and several laws. Also, find out how pressure is used by divers and doctors. Radioactive Decay Calculator Our radioactive decay calculator will help you understand what radioactive decay is and how it is related to the activity of a substance. Two-Photon Absorption Calculator Use the two-photon absorption calculator to calculate the expected excitation rate in a two-photon absorption process. Young-Laplace Equation Calculator Determine a liquid's capillary pressure and height in a tube using our Young-Laplace equation calculator. Organic chemistry calculators 🛢️ Chemical Oxygen Demand Calculator Omni's chemical oxygen demand calculator is your one-stop tool to determine the amount of oxygen needed to oxidize the organic compounds in water. Combustion Analysis Calculator The combustion analysis calculator determines the empirical and molecular formulas of C, H, O, and hydrocarbon compounds. Combustion Reaction Calculator The combustion reaction calculator will give any hydrocarbon or C, H, O organic compound balanced combustion reaction. Crude Protein Calculator Use the crude protein calculator to determine an estimate of the protein content of a sample you are analyzing using the Kjeldahl method. Degree of Unsaturation Calculator Use the degree of unsaturation calculator to determine the number of rings and pi bonds using the molecular formula of your organic structure. Double Bond Equivalent Calculator The double bond equivalent calculator is here to help you determine the number of double bonds, triple bonds, or rings in an organic molecule. Liquid Ethylene Density Calculator You can use this liquid ethylene density calculator to both calculate and look up the density of liquid ethylene at specific pressures and temperatures. Radiocarbon Dating Calculator (Carbon 14 Dating) Use this online radiocarbon dating calculator to determine the age of prehistoric organic samples. Biochemistry calculators 🧫 Calibration Curve Calculator With our calibration curve calculator, you will be able to find out the concentration of an unknown sample in a few seconds! Enzyme Activity Calculator Our enzyme activity calculator can help determine the amount of enzymes you'll need for the desired activity. Isoelectric Point Calculator The isoelectric point calculator will help you determine the pH value of a molecule that carries no charge. Michaelis-Menten Equation Calculator Michaelis-Menten equation calculator helps you compute the kinetics of a one-substrate enzyme-catalyzed reaction, commonly found in biochemistry. Protein Solubility Calculator The protein solubility calculator is a tool to calculate the percentage concentration of a protein in a saturated solution, an important thermodynamic property. Resuspension Calculator Our resuspension calculator helps create a stock solution for dissolving oligos. Other calculators Beer-Lambert Law Calculator Use Omni's Beer-Lambert law calculator to calculate the absorbance of light as it passes through any substance. You can also use this calculator to determine the concentration of a solution using Beer's law. Cubic Cell Calculator Discover crystallography with our cubic cell calculator. Detention Time Calculator Use the detention time calculator to determine the time a fluid is kept inside a tank of a given volume and the system's flow rate. Hydraulic Retention Time Calculator The hydraulic retention time calculator will help you determine the length of time a liquid will remain in a reactor or aeration tank. Miller Indices Calculator Find the interplanar distance for a cubic crystal system using our Miller indices calculator.