Example 1
- 70 kg
- 170 cm
24.2
What BMI at 70 kg and 170 cm? 24.2. Still BMI, not muscle mass.
BMI and muscle mass
Enter weight and height. The calculator computes WHO BMI. When you add a body-fat percent, it also shows lean mass and FFMI. 70 kg, 170 cm and 15% give BMI 24.2, 59.5 kg lean and FFMI 20.6.
FFMI and lean mass appear only after a body-fat percent. That is an estimate from weight and BF%, not a DEXA scan. BMR and TDEE run after age.
Results
Enter data and click Calculate.
How it works
BMI and muscle mass in this calculator is still weight in kg divided by height in metres squared. 70 / 1.70² = 24.221. The calculator writes 24.2 in the result. 92 kg and 180 cm give 28.4. 100 kg and 175 cm give 32.7. There is no arm girth and no muscle percent.
Field a is weight. Field b is height. Age, sex, and activity do not enter 24.2. Mifflin BMR and PAL TDEE show only when age is greater than 0. Without age you still get 24.2.
The name mentions muscle mass. The script computes the same WHO BMI as the BMI card. FFMI sits in the abbreviations, not in the result. 32.7 at 100 kg and 175 cm is still kg / m², not kilograms of muscle.
The BMI card next door has the same quotient with no BMR row. BMR computes Mifflin from weight and height. Here BMR is an option after age. Daily TDEE lives on the TDEE card.
Type weight, type height, then Calculate. A comma in 70.5 parses. Zero height leaves a dash. A sketch from a quotient, not a physique score and not a doctor note.
70 kg and 170 cm give 24.2. 92 kg and 180 cm give 28.4. 100 kg and 175 cm give 32.7. With a US header, weight is pounds and height is inches.
Formula
BMI = weight[kg] / (height[m])²
How to use
- Type weight and height, for example 70 kg and 170 cm.
- Type height in cm, for example 170.
- Click Calculate. The result is 24.2.
- 92 kg and 180 cm give 28.4. 100 kg and 175 cm give 32.7.
- BMR runs here only after age. Or on BMR. Muscle mass has no separate formula.
70 kg and 170 cm = 24.2
BMI = kg / m². 70 and 170 give 24.2. At 15% body fat, lean mass is 59.5 kg and FFMI is 20.6.
- BMI
- The WHO quotient. 70 kg and 170 cm show 24.2. Not kilograms of muscle.
- muscle
- Lean mass = weight × (1 − BF%/100). 100 kg at 18% body fat is 82 kg lean.
- Mifflin
- An optional BMR after age. 24.2 alone does not compute it. 92 kg and 180 cm give 28.4.
Examples
Example 2
- 92 kg
- 180 cm
28.4
What BMI at 92 kg and 180 cm? 28.4. The same WHO quotient.
Example 3
- 100 kg
- 175 cm
32.7
What BMI at 100 kg and 175 cm? 32.7. Still kg / m², not FFMI.
Related calculators
Common questions
What BMI at 70 kg and 170 cm?
24.2. 70 / 1.70², then one decimal place in the result.
What about 92 kg and 180 cm?
28.4. The same WHO quotient.
What about 100 kg and 175 cm?
32.7. Still kg / m².
Does the calculator compute FFMI?
Yes, once you enter a body-fat percent. Then lean mass and FFMI appear next to BMI.
When does BMR show?
When you type age greater than 0. 24.2 alone does not need it. The formula is Mifflin.
When does TDEE show?
When BMR from age is ready and activity from the PAL list is set. No age hides TDEE.
Is 24.2 a physique score?
No. A sketch from a quotient. Not a clinic verdict.
Does a comma in 70.5 work?
Yes. 70.5 and 70,5 are the same weight.
Does a US header change 70 and 170?
Yes. Then 70 is pounds and 170 is inches. The 24.2 examples are metric.
Knowledge sources
The 18.5–24.9 bands in this calculator are the WHO convention for adults, not a composition test.
Page updated in 2026.