Waist: measure at narrowest point. Hip: measure at widest point around buttocks.
📊 Your Results
✓ Calculations complete! Save to history to track progress.
BMI
-
-
BMI Prime
-
ratio to healthy max
Ponderal Index
-
kg/m³
Body Age
-
biological estimate
BMI Range-
Underweight
< 18.5
Normal
18.5 - 25
Overweight
25 - 30
Obese
> 30
Ideal Weight Range
-
kg
Weight to Goal
-
-
Body Composition
Body Fat %
-
-
Fat Mass
-
kg
Lean Body Mass
-
kg
Metabolic Profile
BMR
-
cal/day
TDEE
-
-
Daily Water Intake
-
liters
Daily Steps Goal
-
steps
For Weight Change (0.5kg/week)
Daily Deficit/Surplus
-
cal/day
Target TDEE
-
cal/day
-
-
📐 Body Measurements
Waist-to-Height Ratio
-
-
Waist-to-Hip Ratio
-
-
WHR Guide:
-
🥗 Macro Targets & Nutrition
Target Calories
-
cal/day
Protein-
0%0 cal
Carbs-
0%0 cal
Fat-
0%0 cal
Macro Notes:
Lose Fat: High protein (2.2g/kg) to preserve muscle
Maintain: Balanced protein (1.8g/kg) for daily needs
Gain Muscle: Extra protein (2.4g/kg) to build lean mass
Fat always 25% of calories for hormone health
🎯 Goal Timeline Calculator
kg
Weight to Change
-
-
Time Available
-
weeks
Required Daily Adjustment
-
cal/day
Pace Required
-
kg/week
Pace Warning
-
Safe Pace (0.5kg/week):
Time Needed
-
weeks
Target Date
-
-
📈 Progress History
No history yet. Calculate and save to track progress!
BMI Categories
● Underweight: < 18.5
● Normal: 18.5 - 25
● Overweight: 25 - 30
● Obese: > 30
What is BMI?
BMI (Body Mass Index) is a measure of body fat based on height and weight. Calculated as weight(kg) ÷ height(m)².
It's a screening tool for weight categories that may increase health risks, but doesn't measure body fat directly.
BMR & TDEE
BMR: Basal Metabolic Rate—calories your body burns at rest (Mifflin-St Jeor formula).
TDEE: Total Daily Energy Expenditure—total calories burned including activity.
Use TDEE as your baseline for weight goals.
BMI & African Bodies
Research suggests that the relationship between BMI, body fat, and health risks can vary across ethnic groups. Some studies indicate that people of African descent may have a lower body fat percentage at the same BMI compared to European populations.
However, abdominal fat (measured by waist circumference) remains a strong predictor of metabolic risk. Use BMI alongside waist measurements for a fuller picture of your health.
Health Tips
Aim for 150 mins of moderate exercise weekly
Protein at every meal aids muscle retention
Drink water before meals to aid appetite control
Sleep 7-9 hours for optimal metabolism
Reduce added sugars, increase fiber
Track progress beyond the scale (measurements, photos)
Disclaimer
This calculator provides estimates for educational purposes. It is not medical advice. Consult a healthcare provider or registered dietitian for personalized guidance on weight management and nutrition. Individual needs vary based on health conditions, medications, and other factors.
Frequently Asked Questions
Is BMI accurate for everyone?
BMI is a useful screening tool but has limitations. It does not distinguish between muscle and fat mass, so athletes or muscular individuals may have a high BMI despite low body fat. It also does not account for age, sex, bone density, or fat distribution. The AfroTools BMI Calculator includes additional metrics like body fat estimation and waist-to-hip ratio for a more complete picture.
What is considered a healthy BMI range?
According to the WHO, a healthy BMI is between 18.5 and 24.9. Below 18.5 is underweight, 25-29.9 is overweight, and 30 or above is classified as obese. However, these ranges are general guidelines and should be considered alongside other health indicators.
Is my health data stored when I use the BMI calculator?
No. All calculations run entirely in your browser. Your height, weight, and other measurements are never sent to any server or stored remotely. Your data stays private on your device.
Does the BMI calculator support both metric and imperial units?
Yes. You can toggle between metric (kg/cm) and imperial (lbs/inches) units. The calculator automatically converts between systems so you can use whichever you are most comfortable with.
What additional health metrics does this calculator provide?
Beyond basic BMI, the AfroTools calculator provides body fat percentage estimation, macro nutrient targets, goal timeline projections, waist-to-hip ratio analysis, and a health risk assessment based on your measurements.