Calculators

Calculates the change in angular position of a rotating object.

Calculates the osmotic pressure of a solution using the van't Hoff equation. Osmotic pressure is the minimum pressure which needs to be applied to a solution to prevent the inward flow of water across a semipermeable membrane.

Compares the unit price of two items to determine the better deal.

Determines the grade needed on a final exam/assignment to achieve a desired overall course grade.

Performs a t-test (one-sample, two-sample, or paired) to compare means and determine statistical significance.

Calculates the volume or number of moles of a gas at Standard Temperature and Pressure (STP). STP is defined as 0°C (273.15 K) and 1 atm pressure. This calculator uses the ideal gas law to perform these calculations.

Finds the Z-score corresponding to a given cumulative probability (percentile) on a normal distribution.

Calculates the component values (e.g., in L-networks) needed to match impedances for maximum power transfer.

Estimates the volume and weight of soil needed for your garden or landscaping project based on dimensions and soil density.

Calculates the energy content of natural gas in therms given its volume in CCF (hundred cubic feet).