Calculators

This calculator determines the APGAR score of a newborn, a quick assessment of the baby's health at 1 and 5 minutes after birth. It evaluates Appearance (skin color), Pulse (heart rate), Grimace (reflex irritability), Activity (muscle tone), and Respiration (breathing effort).

Calculates the International Normalized Ratio (INR) for patients on warfarin anticoagulant therapy. This calculator uses the prothrombin time (PT) of the patient and the International Sensitivity Index (ISI) of the thromboplastin reagent used in the PT test.

Determines heart rate from an electrocardiogram (ECG) strip by measuring the number of large squares between R waves.

Estimates calorie needs and time required to reach a target weight based on BMI.

This calculator determines if a given year is a leap year and lists all leap years within a specified range.

Calculates the compression ratio and the resulting pressure in pounds per square inch (PSI) of an engine, given the bore, stroke, head volume, and deck clearance.

Calculates the power output, efficiency, RPM, torque, and estimated revenue of a wind turbine based on various input parameters.

Calculates the amount of asphalt needed for a paving project based on the area and asphalt depth.

Calculates the perimeter of a rectangular fence given its length and width.

Calculates the amount of cement needed for concrete or mortar mixes based on the desired ratio.