Free Online Calculators

Calculate the diagonal length of a stair stringer using total rise and total run based on the Pythagorean theorem.

Calculates pulse pressure by subtracting diastolic blood pressure from systolic blood pressure.

Calculate the hypotenuse of a right triangle.

Calculates electrical energy consumption in kilowatt-hours (kWh) based on power and usage time.

Calculate the number of concrete bags required based on total concrete volume needed and yield per bag.

Calculates the absorbance of a solution using the Beer-Lambert Law equation (A = ε × c × l).