Free Online Calculators

Calculate the total carbon dioxide emissions for a flight based on distance traveled and emission factor per kilometer per passenger.

Calculates the anion gap using standard electrolyte values from a basic metabolic panel.

Calculate the gross rental yield percentage of a property based on annual rental income and purchase price.

Calculate how many years it takes to recover an initial investment based on constant annual cash inflow.

Calculates the area of an ellipse using the formula A = πab.

Calculate the capitalization rate to evaluate real estate investment returns.