Calculators
Decision-support tools for sizing, cost, capacity, runtime, ownership, and other practical planning questions.
Calculate average acceleration from an object's initial velocity, final velocity, and elapsed time. Enter both velocities in meters per second and time in seconds to get acceleration in meters per second squared.
Calculate the arithmetic mean of up to five values by adding the numbers you enter and dividing by how many values you provide.
Calculate the final pressure of a fixed amount of gas when its volume changes at constant temperature, using Boyle's law.
Calculate the combined analytical concentration of acid and base components in a buffer solution from their mole amounts and the total solution volume. The result is total concentration in mol/L, not pH or buffer capacity.
Calculate density by dividing an object's mass by its volume. Enter mass and volume in compatible units to get density in mass-per-volume units.
Calculate the volume of stock solution needed to prepare a target concentration at a specified final volume using the dilution equation.
Convert a measured quantity between compatible units by entering its value and the source and target unit scales relative to a shared base unit.
Calculate electrical power in watts from voltage and current using the direct-current relationship P = V × I. Enter voltage in volts and current in amperes.
Calculate the net force on an object from its mass and acceleration using Newton’s second law, F = m × a.
Add or subtract two fractions and view the result as a simplified fraction and decimal.
Calculate frequency in hertz by dividing the number of observed cycles by the time interval in seconds.
Estimate the attractive gravitational force between two point masses using Newton’s law of universal gravitation. The result is a Newtonian point-mass approximation in newtons.
Calculate how much of a starting radioactive sample remains after a given time using its half-life.
Calculate the pressure, volume, amount, or temperature of an ideal gas using PV = nRT. Enter three known quantities and solve for the remaining quantity. Pressure is measured in pascals, volume in cubic meters, amount in moles, and temperature in kelvins.
Calculate an object's translational kinetic energy from its mass and speed using the classical formula, with mass in kilograms, speed in meters per second, and energy in joules.
Estimate the absolute uncertainty range for a measured value from a user-supplied relative uncertainty percentage. The calculation assumes a symmetric range and uses the same units as the reading.
Combine two independent measurement uncertainties expressed in the same units using the root-sum-of-squares method.
Calculate the median of a set of numeric observations by entering their values in order. For an even number of observations, the calculator averages the two middle values.
Estimate the specimen area visible through a microscope by dividing the eyepiece field number by the objective magnification. The estimate assumes the field number is expressed in millimeters and does not account for camera sensors, adapters, or optical distortion.
Calculate total optical magnification by multiplying the objective lens magnification by the eyepiece magnification. This estimates image enlargement and does not measure resolution or image quality.
Calculate the molar mass of a binary compound by adding the contributions of its two elements. Enter each element's atomic mass in g/mol and the number of atoms of that element in one formula unit.
Calculate solution molarity from the amount of solute and the final solution volume. Enter solute amount in moles and solution volume in liters.
Calculate the implied probability, potential gross return, and net profit from decimal odds and a stake. This simple decimal-odds model does not account for fees, taxes, or bookmaker adjustments.
Calculate electric current in amperes from voltage and resistance using Ohm’s law, I = V / R.
Calculate parts per million by mass from the mass of a substance and the total sample mass. The result uses the relationship ppm = (substance mass ÷ total sample mass) × 1,000,000, with both masses entered in the same unit.
Calculate the percent yield of a chemical reaction by comparing the actual product obtained with the theoretical product expected. Enter both quantities in the same unit.
Calculate what percentage one value is of another using two numbers.
Calculate the percentage decrease from an original value to a smaller new value. Enter both values in the same units to find the change as a percentage of the original.
Calculate the percentage increase from an original value to a new value using the difference divided by the original value.
Calculate an object's gravitational potential energy near Earth's surface from its mass, gravitational field strength, and vertical height change. The result uses the reference level you choose as zero height.
Calculate what percentage one part represents of a whole, or find the corresponding part from a known whole and percentage.
Estimate the remaining amount of a radioactive sample after a given time using its initial amount and half-life. This idealized model assumes a constant half-life and does not account for measurement uncertainty or other processes.
Scale a ratio from two positive quantities to find the equivalent amount for a new quantity.
Decode a resistor's color bands to find its nominal resistance and tolerance range. Select the bands in order from the end opposite the tolerance band.
Convert a number into normalized scientific notation by entering its coefficient and power of ten, or convert a decimal value into scientific notation.
Calculate the concentration remaining after repeated, equal serial dilution steps from a starting concentration, a per-step dilution factor, and the number of steps.
Calculate the mass concentration of a solution from the solute mass and final solution volume. Enter both quantities in compatible units to get mass per volume.
Calculate a material's specific heat capacity from the heat transferred, mass, and temperature change using c = Q / (m × ΔT).
Calculate the elastic energy stored in an ideal spring from its spring constant and compression distance using Hooke's law.
Calculate the population or sample standard deviation from a set of observations by entering the values as a count, sum, and sum of squared deviations from the mean.
Calculate the standard error of a sample mean from a standard deviation and sample size. The calculation assumes independent observations and uses the sample standard deviation as an estimate of population spread.
Estimate the theoretical mass of one product from a balanced chemical equation, a measured reactant mass, and molar masses. Assumes the supplied reactant is fully consumed and the reaction proceeds according to the balanced equation.
Estimate a solid material’s change in length and final length from its initial length, linear expansion coefficient, and temperature change using the linear expansion model.
Calculate the elapsed time between two clock readings by entering the start and end hours and minutes. The result is shown in decimal hours.
Calculate average velocity from displacement and elapsed time. Enter signed displacement in meters and time in seconds to get velocity in meters per second.
Calculate the ideal output voltage of a two-resistor voltage divider from the supply voltage and resistor values. Assumes an unloaded output and ideal components.
Calculate wavelength from wave speed and frequency using the relationship wavelength = speed ÷ frequency. Enter values in matching units to get a wavelength in meters.
Calculate the weighted average of three values by multiplying each value by its weight, adding the products, and dividing by the total weight. The first weight must be at least 0.001 so the denominator stays positive.
Calculate work in joules from the signed force component along a displacement and the distance traveled in meters.
Calculate how many standard deviations a value is above or below a mean using the z score formula.