Chemistry & Biology
Molar mass, moles, dilution, molarity, pH, gas ppm ↔ mg/m³, half-life, cell growth, animal gestation, genetics and carbon footprint.
12 tools
- Molar Mass CalculatorFind the molar mass of any chemical formula — brackets and hydrates included — with each element's share.
- Grams to Moles CalculatorConvert between grams, moles and number of particles for any substance, using its formula or molar mass.
- Dilution Calculator (C1V1 = C2V2)Solve C1V1 = C2V2 for any one value to dilute a stock solution to the concentration you need.
- Molarity CalculatorFind a solution's molarity from the mass dissolved and the volume — or the mass or volume needed for a target molarity.
- pH CalculatorConvert between pH, hydrogen-ion concentration [H+], pOH and hydroxide concentration [OH−] for water at 25 °C.
- Half-Life CalculatorWork out how much of a radioactive substance remains after a time, how long decay takes, or the half-life itself.
- Cell Doubling Time CalculatorFind the doubling time and growth rate of cells or bacteria from two counts, or predict a future count.
- Animal Gestation CalculatorEstimate the due-date range for a dog, cat, horse or cow from the breeding date, using veterinary gestation ranges.
- Punnett Square CalculatorCross two parents for one or two genes and see the Punnett square with genotype and phenotype ratios.
- Carbon Footprint CalculatorEstimate the yearly CO2e from your driving and flights using the U.S. EPA's 2025 emission factors.
- Gas Concentration Converter (ppm ↔ mg/m³)Convert gas concentrations between ppm/ppb and mg/m³ or µg/m³ using the gas's molar mass, temperature and pressure.