Half-Life Calculator
Calculate the amount remaining after a given time from the starting quantity and half-life.
Enter your values and press Calculate.
How to use the Half-Life calculator
The default uses carbon-14 (half-life 5,730 years), the basis of radiocarbon dating.
Formula
N = N₀ × (½)t / t½
More science calculators
Density CalculatorSolve for density, mass or volume.Speed, Distance & Time CalculatorSolve for speed, distance or time.Acceleration CalculatorAcceleration from velocity change and time.Force Calculator (F = ma)Newton’s second law.Kinetic Energy CalculatorKinetic energy from mass and velocity.Potential Energy CalculatorGravitational potential energy mgh.Momentum CalculatorMomentum from mass and velocity.Work & Power CalculatorWork done and power from force, distance and time.Ideal Gas Law CalculatorSolve PV = nRT for any variable.Molar Mass CalculatorMolar mass of any chemical formula.Grams to Moles CalculatorConvert grams to moles and molecules.Molarity CalculatorMolarity, mass or volume of a solution.Dilution Calculator (C1V1 = C2V2)Stock volume needed for a dilution.pH CalculatorpH, pOH and ion concentrations.PPM ConverterConvert ppm, ppb, percent and mg/L.Wavelength & Frequency CalculatorConvert between wavelength and frequency.Water Weight CalculatorWeight of a volume of water.Percent Yield CalculatorPercent yield of a chemical reaction.