IMC Calculator (kg / cm)
Use this free calculator to find your IMC (Índice de Masa Corporal), also called BMI. Enter your weight in kilograms and height in centimeters.
What is IMC?
IMC stands for Índice de Masa Corporal. In English, it is known as Body Mass Index (BMI). It is a quick screening tool that compares your weight to your height to estimate whether your body weight is in a lower, typical, or higher range for adults.
This calculator is made for people who use the metric system and want a simple IMC calculator in kg and cm. You can use it in seconds and get a category plus your healthy weight range estimate.
How to use this IMC calculator kg tool
- Enter your current body weight in kilograms.
- Enter your height in centimeters.
- Click Calculate IMC.
- Read your IMC score and category.
The result also shows an estimated healthy-weight range for your height based on the standard IMC range of 18.5 to 24.9.
IMC formula explained
The formula is:
IMC = weight (kg) / (height in meters × height in meters)
Example: if someone weighs 70 kg and is 170 cm tall (1.70 m):
- Square height: 1.70 × 1.70 = 2.89
- IMC: 70 ÷ 2.89 = 24.2
That IMC value is generally considered in the normal range for adults.
IMC categories for adults
| IMC Value | Category |
|---|---|
| Below 18.5 | Underweight |
| 18.5 – 24.9 | Normal weight |
| 25.0 – 29.9 | Overweight |
| 30.0 – 34.9 | Obesity Class I |
| 35.0 – 39.9 | Obesity Class II |
| 40.0 and above | Obesity Class III |
Important notes before interpreting your score
1) IMC is a screening tool, not a diagnosis
IMC is useful for quick assessment, but it does not directly measure body fat, muscle mass, bone density, or fat distribution.
2) Athletes can have higher IMC with low body fat
Very muscular people may get an IMC score that appears high even when they are healthy and fit.
3) Age, sex, and medical history matter
Your personal health picture is broader than one number. Waist circumference, blood pressure, blood tests, fitness level, and lifestyle habits are also important.
Who should use this calculator?
This calculator is best for most adults who want a quick check in metric units. It may be less appropriate as a stand-alone tool for:
- Children and teens (they need age- and sex-specific percentiles)
- Pregnant individuals
- Elite athletes and highly muscular adults
- Older adults with major muscle loss
Practical next steps based on your IMC
If your IMC is below range
Focus on nutrient-dense meals, balanced protein intake, and strength-focused activity. If unintentional weight loss is present, seek medical advice.
If your IMC is in the normal range
Great—maintain consistent habits: regular movement, quality sleep, hydration, and a varied whole-food diet.
If your IMC is above range
Start with sustainable changes: daily walks, resistance training, fewer liquid calories, and meal structure. Small consistent habits usually outperform extreme short-term plans.
Quick FAQ: IMC calculator kg
Is IMC and BMI the same thing?
Yes. IMC is the Spanish/Portuguese abbreviation, while BMI is the English term. The formula is identical.
Can I use feet/inches with this tool?
This version is built for kilograms and centimeters. If needed, convert first: 1 inch = 2.54 cm, 1 foot = 30.48 cm.
How often should I check IMC?
For most people, every few weeks or once per month is enough. Daily fluctuations are normal and may not reflect meaningful change.
Final thoughts
A reliable IMC calculator in kg is one of the fastest ways to get a useful starting point for your health journey. Use your score for awareness, then pair it with better habits and professional guidance when needed. Long-term consistency matters far more than chasing perfect numbers.