Calculators

Estimates hiking time or calories burned based on distance, elevation gain, and pace.

Converts a quadratic expression to vertex form by completing the square.

This calculator helps predict the likelihood of bacterial pharyngitis (strep throat) based on clinical signs. The Centor score, also known as the McIsaac score, is a clinical decision rule used to determine the need for throat swab testing or antibiotic treatment.

Estimates the volume of blood pumped by the heart per minute (often requires clinical inputs).

Estimates the daily calories needed to maintain current weight based on the Mifflin-St Jeor equation and activity level.

Estimates your credit score based on factors like payment history, amounts owed, length of credit history, credit mix, and new credit.

This calculator estimates the costs associated with having a baby, including prenatal care, delivery, and initial baby expenses.

Calculates your age based on a birth date and a reference date.

Calculates the length of a rolled-up rectangular sheet based on its diameter, core diameter, and number of rotations.

Calculates the Shannon Diversity Index (H') to quantify species diversity in a community. The index considers both the number of species and the evenness of their distribution.