Body Surface Area Calculator
Calculate body surface area (BSA) in square metres using the Mosteller and Du Bois formulas.
Enter your values and press Calculate.
How to use the Body Surface Area calculator
BSA is used clinically for dosing some medications. Dosing decisions must always be made by a clinician.
Formula
Mosteller: BSA = √(height cm × weight kg ÷ 3600)
More health & fitness calculators
BMI CalculatorBody mass index with healthy weight range.Calorie Calculator (BMR & TDEE)Daily calories to maintain, lose or gain weight.Body Fat CalculatorBody fat percentage using the US Navy method.Running Pace CalculatorPace per mile and kilometre from distance and time.Ideal Weight CalculatorIdeal body weight by four published formulas.Pregnancy Due Date CalculatorEstimated due date from the last period.Target Heart Rate CalculatorHeart rate training zones by age.Zone 2 Heart Rate CalculatorYour Zone 2 training heart rate range.One-Rep Max CalculatorEstimate your 1RM from any set.Calories Burned CalculatorCalories burned for 16 activities.Steps to Miles CalculatorConvert steps to miles, km and calories.Water Intake CalculatorHow much water to drink per day.Lean Body Mass CalculatorLean body mass with the Boer formula.Waist-to-Height Ratio CalculatorWaist-to-height and waist-to-hip ratios.Macro CalculatorDaily protein, carbs and fat in grams.Protein Intake CalculatorDaily protein needs by weight and goal.Ovulation CalculatorFertile window and next ovulation date.Sleep CalculatorBest bedtimes based on 90-minute sleep cycles.