A health search that stays in the top of “body” queries. This page has 100 important questions and answers. Original explainer for daily search — not a government login or live tracker.
BMI (body mass index) is weight (kg) divided by height (m) squared. Example: 70 kg and 1.75 m → 70 ÷ (1.75 × 1.75) ≈ 22.9. Adult bands (WHO) run underweight / healthy / overweight / obesity — they are screening tools, not a diagnosis.
BMI does not see muscle vs fat, bone, or where fat sits. Athletes can score “overweight” and still be fit. Children use age-and-sex charts, not adult cut-offs. Talk to a clinician about health, not a comment section.
100 important questions. Quick 10 is a random set; Full set plays every question.
Your score
100 questions and answers
Each item is a 4-option MCQ. Open a question, tap A–D. Green is correct, red is wrong. Original explainers — not copied match reports.
1. Adult BMI 25.0 to 29.9 is commonly classed
Tap A, B, C or D.
Answer: A) overweight on WHO adult charts
Athletes can land here with high muscle.
2. Adult BMI 30.0 and above is commonly classed
Tap A, B, C or D.
Answer: B) obesity on WHO adult charts
Classes I–III split higher values.
3. Adult BMI under 18.5 is commonly classed
Tap A, B, C or D.
Answer: D) underweight
A clinician should look at why.
4. BMI 35 and above is often called
Tap A, B, C or D.
Answer: B) class II obesity on many adult charts
Local labels can vary slightly.
5. BMI 40 and above is often called
Tap A, B, C or D.
Answer: D) class III (severe) obesity on many charts
Health risk is about more than the number.
6. Height in the metric formula must be
Tap A, B, C or D.
Answer: C) in metres, then squared
175 cm is 1.75 m, not 175.
7. 80 kg at 1.80 m is about BMI
Tap A, B, C or D.
Answer: D) 24.7
1.80 squared is 3.24; 80 / 3.24 is about 24.7.
8. 60 kg at 1.60 m is about BMI
Tap A, B, C or D.
Answer: D) 23.4
1.60 squared is 2.56; 60 / 2.56 is about 23.4.
9. 90 kg at 1.70 m is about BMI
Tap A, B, C or D.
Answer: D) 31.1
1.70 squared is 2.89; 90 / 2.89 is about 31.1.
10. 50 kg at 1.50 m is about BMI
Tap A, B, C or D.
Answer: A) 22.2
1.50 squared is 2.25; 50 / 2.25 is about 22.2.
11. 100 kg at 2.00 m is BMI
Tap A, B, C or D.
Answer: C) 25.0
2 squared is 4; 100 / 4 = 25.
12. BMI does not report
Tap A, B, C or D.
Answer: B) body-fat percentage
Two people with the same BMI can look different.
13. Pregnancy is a reason to
Tap A, B, C or D.
Answer: B) avoid adult BMI as a solo health grade
Ask a clinician about weight in pregnancy.
14. Waist circumference is used because
Tap A, B, C or D.
Answer: D) central fat adds risk the BMI can miss
Tape plus BMI is a common pair.
15. Some adult Asian clinical cut-offs are
Tap A, B, C or D.
Answer: C) lower than generic WHO overweight lines
Local guidance beats a random blog.
16. Older adults can have
Tap A, B, C or D.
Answer: C) higher BMI with different risk than a young adult at the same number
Sarcopenia and fat mix change.
17. A rugby forward with BMI 29 may still be
Tap A, B, C or D.
Answer: B) fit, because muscle is dense
Fitness tests and waist add context.
18. To use pounds and inches, a common factor is
Tap A, B, C or D.
Answer: D) 703 × lb / in²
Official calculators apply this.
19. 150 lb at 65 inches is about BMI
Tap A, B, C or D.
Answer: C) 25.0
703 × 150 / 65² ≈ 24.96.
20. If you only have cm, first
Tap A, B, C or D.
Answer: A) divide by 100 to get metres
180 cm is 1.80 m.
21. BMI is a ratio, so units must
Tap A, B, C or D.
Answer: A) match the formula you chose
kg with cm unconverted is a classic error.
22. Child BMI is plotted on
Tap A, B, C or D.
Answer: D) age-and-sex percentile charts, not adult cut-offs alone
A paediatrician reads the centile.
23. A BMI calculator cannot
Tap A, B, C or D.
Answer: A) see oedema, amputation, or plaster casts that change weight
Clinical judgement still matters.
24. Underweight BMI plus fatigue is
Tap A, B, C or D.
Answer: C) a reason to seek care, not a diet contest
Eating-disorder risk needs specialists.
25. Obesity class labels are
Tap A, B, C or D.
Answer: D) population screens linked to average risk, not a moral grade
Talk treatment with a clinician.
26. If height is 1.65 m, height squared is about
Tap A, B, C or D.
Answer: C) 2.72
1.65 × 1.65 = 2.7225.
27. 70 kg divided by 2.7225 is about BMI
Tap A, B, C or D.
Answer: A) 25.7
That sits near the overweight line for adults.
28. BMI was first popularised as
Tap A, B, C or D.
Answer: A) a simple population index (Quetelet), not a full medical exam
It stuck because it is cheap to compute.
29. Very short or very tall adults may see
Tap A, B, C or D.
Answer: B) the same BMI map risk less accurately
Other measures help at the extremes.
30. A weekly weight swing of 1–2 kg is often
Tap A, B, C or D.
Answer: D) water and gut contents, not a new BMI class
Do not chase daily calculator drama.
31. To lower BMI you must
Tap A, B, C or D.
Answer: C) change weight and/or (rarely) adult height is fixed
Height in adults is not a lever.
32. Bodybuilders in contest week can show
Tap A, B, C or D.
Answer: A) low body fat with a BMI that still looks high
Look at composition, not only the ratio.
33. WHO bands are for adults; teens need
Tap A, B, C or D.
Answer: D) centile charts used with a professional
Do not apply adult shame to a growing body.
34. A clinic may still use BMI because
Tap A, B, C or D.
Answer: A) it is fast to track in a record over time
Trends in one person can still inform care.
35. If two people share BMI 27, they can differ in
Tap A, B, C or D.
Answer: C) waist, fitness, bloods, and disease risk
The number is the start, not the end.
36. Squaring height means a small height error
Tap A, B, C or D.
Answer: B) moves BMI more than people expect
Measure height carefully, shoes off.
37. Stones and pounds must be
Tap A, B, C or D.
Answer: D) converted to kg (or used in a matching imperial tool)
1 stone is 14 pounds; then convert.
38. BMI is not designed as
Tap A, B, C or D.
Answer: D) a beauty score or a comment-section weapon
Shame is not a clinical tool.
39. A result of 22.9 from 70 kg and 1.75 m sits
Tap A, B, C or D.
Answer: A) inside the common adult healthy band
1.75² = 3.0625; 70 / 3.0625 ≈ 22.9.
40. Online NHS or CDC calculators are useful because
Tap A, B, C or D.
Answer: D) they apply the unit conversions for you
Still read the limitation notes.
41. BMI should not be used alone to
Tap A, B, C or D.
Answer: B) deny someone care or mock them
People are not a single index.
42. The official source for “how to calculate bmi” (learn desk, item 1) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
43. The official source for “how to calculate bmi” (learn desk, item 2) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
44. The official source for “how to calculate bmi” (learn desk, item 3) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
45. The official source for “how to calculate bmi” (learn desk, item 4) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
46. The official source for “how to calculate bmi” (learn desk, item 5) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
47. The official source for “how to calculate bmi” (learn desk, item 6) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
48. The official source for “how to calculate bmi” (learn desk, item 7) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
49. The official source for “how to calculate bmi” (learn desk, item 8) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
50. The official source for “how to calculate bmi” (learn desk, item 9) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
51. The official source for “how to calculate bmi” (learn desk, item 10) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
52. The official source for “how to calculate bmi” (learn desk, item 11) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
53. The official source for “how to calculate bmi” (learn desk, item 12) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
54. The official source for “how to calculate bmi” (learn desk, item 13) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
55. The official source for “how to calculate bmi” (learn desk, item 14) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
56. The official source for “how to calculate bmi” (learn desk, item 15) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
57. The official source for “how to calculate bmi” (learn desk, item 16) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
58. The official source for “how to calculate bmi” (learn desk, item 17) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
59. The official source for “how to calculate bmi” (learn desk, item 18) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
60. The official source for “how to calculate bmi” (learn desk, item 19) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
61. The official source for “how to calculate bmi” (learn desk, item 20) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
62. The official source for “how to calculate bmi” (learn desk, item 21) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
63. The official source for “how to calculate bmi” (learn desk, item 22) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
64. The official source for “how to calculate bmi” (learn desk, item 23) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
65. The official source for “how to calculate bmi” (learn desk, item 24) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
66. The official source for “how to calculate bmi” (learn desk, item 25) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
67. The official source for “how to calculate bmi” (learn desk, item 26) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
68. The official source for “how to calculate bmi” (learn desk, item 27) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
69. The official source for “how to calculate bmi” (learn desk, item 28) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
70. The official source for “how to calculate bmi” (learn desk, item 29) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
71. The official source for “how to calculate bmi” (learn desk, item 30) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
72. The official source for “how to calculate bmi” (learn desk, item 31) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
73. The official source for “how to calculate bmi” (learn desk, item 32) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
74. The official source for “how to calculate bmi” (learn desk, item 33) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
75. The official source for “how to calculate bmi” (learn desk, item 34) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
76. The official source for “how to calculate bmi” (learn desk, item 35) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
77. The official source for “how to calculate bmi” (learn desk, item 36) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
78. The official source for “how to calculate bmi” (learn desk, item 37) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
79. The official source for “how to calculate bmi” (learn desk, item 38) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
80. The official source for “how to calculate bmi” (learn desk, item 39) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
81. The official source for “how to calculate bmi” (learn desk, item 40) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
82. The official source for “how to calculate bmi” (learn desk, item 41) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
83. The official source for “how to calculate bmi” (learn desk, item 42) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
84. The official source for “how to calculate bmi” (learn desk, item 43) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
85. The official source for “how to calculate bmi” (learn desk, item 44) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
86. The official source for “how to calculate bmi” (learn desk, item 45) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
87. The official source for “how to calculate bmi” (learn desk, item 46) is
Tap A, B, C or D.
Answer: C) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
88. The official source for “how to calculate bmi” (learn desk, item 47) is
Tap A, B, C or D.
Answer: D) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
89. The official source for “how to calculate bmi” (learn desk, item 48) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
90. The official source for “how to calculate bmi” (learn desk, item 49) is
Tap A, B, C or D.
Answer: B) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
91. The official source for “how to calculate bmi” (learn desk, item 50) is
Tap A, B, C or D.
Answer: A) the authority or standard named on this page’s explainer
GKSchools English practice is original — not an official script.
92. BMI formula is
Tap A, B, C or D.
Answer: C) kg / m²
Convert stones/pounds and feet/inches first if needed.
93. A BMI of 22 in an adult is often classed
Tap A, B, C or D.
Answer: B) in the healthy range (WHO adult bands)
Bands are population screens.
94. BMI does not measure
Tap A, B, C or D.
Answer: C) muscle versus fat
A rugby forward may have a high BMI.
95. Children’s BMI is read on
Tap A, B, C or D.
Answer: A) age-and-sex percentile charts
Paediatric rules differ.
96. 70 kg at 1.75 m is about
Tap A, B, C or D.
Answer: D) 22.9
1.75² = 3.0625; 70 ÷ 3.0625 ≈ 22.9.
97. BMI is useful as
Tap A, B, C or D.
Answer: A) a quick screen, not a full health exam
Waist, bloods, and fitness add context.
98. Imperial shortcut uses
Tap A, B, C or D.
Answer: A) lb and inches with a convert factor (703 × lb / in²)
Online NHS/CDC calculators do this.
99. Do not use BMI alone to
Tap A, B, C or D.
Answer: B) shame someone or skip medical advice
Eating-disorder risk needs care, not a calculator flex.
