Adjusted Body Weight Calculator

Gender:

Height (cm):

cm ▾

Actual Body Weight:

kg ▾

Estimate your ideal body weight and adjusted body weight within seconds by using this simple adjusted body weight calculator.

Understanding Adjusted Body Weight:

This is a vital calculation used in the medical field to estimate the overall health condition of a patient. It helps determine the correct dosage of medicines for obese patients.

BMI (Body Mass Index) is widely used to measure obesity in patients, as shown in the following table:

Category	BMI
Underweight	Below 18.5 kg/m
Normal	18.5 to 24.9 kg/m
Overweight	25.0 to 29.9 kg/m
Obese - Class I	30.0 to 34.9 kg/m
Obese - Class II	35.0 to 39.9 kg/m
Extreme Obesity (Class III)	Above 40 kg/m

When To Use Adjusted Body Weight?

Adjusted Body Weight (ABW) is commonly used for overweight or obese patients. It provides a more accurate estimate of the patient’s nutritional requirements.

It is particularly useful when doctors or dietitians need to determine the proper nutritional intake, calculate the correct dosage of medications, or design a diet plan for patients who have gained excess weight.

Adjusted Body Weight Formula:

The formula for calculating Adjusted Body Weight is as follows:

ABW = IBW + 0.4 × (Actual Weight - IBW)

Males Ideal Body Weight: IBW = 50 kg + 2.3 kg for each inch over 5 feet

Females Ideal Body Weight: IBW = 45.5 kg + 2.3 kg for each inch over 5 feet

IBW represents the Ideal Body Weight
AW represents the Actual Body Weight

What Is The Ideal Body Weight Percentage?

The table below provides the Ideal Body Weight values for both males and females.

Height in Feet	Height in cm	Average Weight in KG for Male	Average Weight in KG for Female
4’6” feet	137 cm	28.5 – 34.9 kg	28.5 – 34.9 kg
4’7” feet	140 cm	30.8 – 38.1 kg	30.8 – 38.1 kg
4’8” feet	142 cm	33.5 – 40.8 kg	32.6 – 39.9 kg
4’9” feet	145 cm	35.8 – 43.9 kg	34.9 – 42.6 kg
4’10” feet	147 cm	38.5 – 46.7 kg	36.4 – 44.9 kg
4’11” feet	150 cm	40.8 – 49.9 kg	39 – 47.6 kg
5’0” feet	152 cm	40.1 – 53 kg	40.8 – 49.9 kg
5’1” feet	155 cm	45.8 – 55.8 kg	43.1 – 52.6 kg
5’2” feet	157 cm	48.1 – 58.9 kg	44.9 – 54.9 kg
5’3” feet	160 cm	50.8 – 60.1 kg	47.2 - 57.6 kg
5’4” feet	163 cm	50.0 – 64.8 kg	49 - 59.9 kg
5’5” feet	165 cm	55.3 – 68 kg	51.2 - 62.6 kg
5’6” feet	168 cm	58 – 70.7 kg	53 - 64.8 kg
5’7” feet	170 cm	60.3 – 73.9 kg	55.3 - 67.6 kg
5’8” feet	173 cm	63 – 70.6 kg	57.1 - 69.8 kg
5’9” feet	175 cm	65.3 – 79.8 kg	59.4 - 72.6 kg
5’10” feet	178 cm	67.6 – 83 kg	61.2 - 74.8 kg
5’11” feet	180 cm	70.3 – 85.7 kg	63.5 - 77.5 kg
6’0” feet	183 cm	72.6 – 88.9 kg	65.3 - 79.8 kg

How To Calculate Adjusted Body Weight?

Follow the steps below to calculate Adjusted Body Weight (ABW) manually:

Measure your height in inches or centimeters.
Determine your actual weight.
Calculate your ideal body weight (IBW) using the formulas for males and females mentioned above.
Substitute these values into the ABW formula to find your Adjusted Body Weight.

If you prefer a quicker method, you can use an online Adjusted Body Weight Calculator to perform the calculation instantly.

Example:

Let's suppose the ideal body weight of a male who is 64 inches tall is 80 kg. If he is obese (> IBW + 30%), how do we calculate the Adjusted Body Weight (ABW)?

Solution:

Given:

Actual Body Weight = 80 kg

Height = 64 inches

Step 1: Calculate Male IBW

IBW = 50 kg + 2.3 kg for each inch over 5 feet (60 inches)

Difference in height = 64 - 60 = 4 inches

IBW = 50 + 2.3 × 4

IBW = 50 + 9.2

IBW = 59.2 kg

Step 2: Calculate Adjusted Body Weight (ABW)

ABW = IBW + 0.4 × (Actual Weight - IBW)

ABW = 59.2 + 0.4 × (80 - 59.2)

ABW = 59.2 + 0.4 × 20.8

ABW = 59.2 + 8.32

ABW = 67.52 kg

How This Adjusted Body Weight Calculator Serves You?

The ABW calculator uses your height, actual weight, and gender to calculate both the Ideal Body Weight (IBW) and Adjusted Body Weight (ABW) in multiple units.

Adjusted Body Weight:

Displays ABW in kilograms (kg), pounds (lb), and stones (stone). It reflects the nutritional requirements of the body based on a person’s weight and height.

Ideal Body Weight:

Calculates IBW according to gender in kg, pounds (lb), and stones (stone). This tool is especially useful for doctors, dietitians, and fitness trainers to design personalized diet plans and determine appropriate medication dosages based on a person's body needs.

FAQ’s:

What is the Formula for Adjusted Body Weight in Obesity?

The formula for calculating Adjusted Body Weight (ABW) in obese patients is: ABW = IBW + 0.4 × (Actual Weight - IBW)

Why is Adjusted Body Weight Calculated?

ABW is calculated when there is a need to determine the energy requirements of an obese patient. Using an adjusted body weight calculator allows for a quick and accurate calculation.

Why Do I Look Leaner But Weigh the Same?

This can occur if you are losing fat but gaining muscle simultaneously. Muscle is denser than fat, so your weight may stay the same while your body composition improves. Using a scale along with measurements can help track your progress more accurately. Learn more about weight loss tracking.

References:

From OpenAnesthesia.org: Adjusted Body Weight (ABW).

From PharmacyTimes.com: Adjusted Body Weight calculations.