Calculators

Calculates odds and probabilities, converting between the two and determining odds from event counts.

Calculates the ratio of arm span to height, sometimes used in climbing assessments.

Calculates pressure, volume, temperature, or the number of moles of an ideal gas using the Ideal Gas Law: PV = nRT. Where P = pressure, V = volume, n = number of moles, R = ideal gas constant, and T = temperature.

Performs arithmetic operations (add, subtract, multiply, divide) on binary numbers.

Calculates the volume, surface area, or diagonal length of a rectangular prism (box).

Calculates the volume, surface area, and diagonal of a cube based on the length of one side.

Calculates the down payment required for a purchase based on the purchase price and the down payment percentage.

Calculates the net present value (NPV) of an investment, considering initial investment, cash flows, and discount rate.

Converts time in hh:mm:ss format to decimal hours.

Converts between quarts (US liquid) and pounds, based on the density of the substance. This calculator uses the density of water (1.0 kg/L or approximately 2.086 lbs/quart) as a default. You can adjust the density to match the substance you are measuring.