Calculators

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.

Estimates the calorie surplus needed to gain a specific amount of weight over time. Based on the general guideline that 3500 calories equals approximately one pound of fat.

This calculator converts between various units of force, including Newtons, dynes, pounds-force, and kilogram-force.

Calculates the rafter length and roof slope based on the roof pitch and run.

Calculates the square yardage of a rectangular area and estimates the total cost of flooring or other covering materials.

Calculates the volume of concrete needed for tube blocks, based on the tube diameter and height. It also estimates the amount of cement needed, assuming a standard mix ratio.

Calculates the infusion rate for intravenous fluids in mL/hour or drops/minute.

Calculates the ratio of albumin to creatinine in urine, screening for kidney damage (especially in diabetics).

Estimates recommended daily water consumption based on factors like weight and activity level.

Estimates the cost of electricity needed to run a device for a particular period.