A daily weather and cooking search — the formula people re-type every winter. This page has 100 important questions and answers. Original explainer for daily search — not a government login or live tracker.
To convert Celsius to Fahrenheit: multiply by 9/5 (or 1.8), then add 32. So F = C × 1.8 + 32. The other way: C = (F − 32) × 5/9. Water freezes at 0°C / 32°F and boils at 100°C / 212°F at standard pressure.
Body-temperature talk: 37°C is about 98.6°F (an old average, not a law). A kitchen oven at 180°C is 356°F. Weather apps in the US default to °F; most of the world uses °C.
Do not mix the formulas. Adding 32 first and then multiplying gives a wrong cooking temperature — a common phone-calculator mistake.
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. Water freezes at
Tap A, B, C or D.
Answer: B) 0°C and 32°F
Same physical point, two scales.
2. Water boils (standard pressure) at
Tap A, B, C or D.
Answer: B) 100°C / 212°F
Altitude changes the boil a little.
3. 37°C is about
Tap A, B, C or D.
Answer: A) 98.6°F
It is a textbook average, not every healthy person.
4. 180°C in an oven is
Tap A, B, C or D.
Answer: B) 356°F
1.8 × 180 + 32 = 356.
5. A common mistake is
Tap A, B, C or D.
Answer: D) adding 32 before multiplying
Order matters.
6. Celsius is not
Tap A, B, C or D.
Answer: A) the same scale as Fahrenheit
US media still quote °F.
7. 10°C is
Tap A, B, C or D.
Answer: C) 50°F
10 × 1.8 + 32 = 50.
8. 20°C is
Tap A, B, C or D.
Answer: C) 68°F
20 × 1.8 + 32 = 68.
9. 25°C is
Tap A, B, C or D.
Answer: D) 77°F
A common roomy indoor target in some homes.
10. 30°C is
Tap A, B, C or D.
Answer: C) 86°F
30 × 1.8 + 32 = 86.
11. 40°C is
Tap A, B, C or D.
Answer: A) 104°F
Heat-wave talk in °C; US headlines use °F.
12. −10°C is
Tap A, B, C or D.
Answer: A) 14°F
Negative C still gets ×1.8 then +32.
13. −40 is
Tap A, B, C or D.
Answer: B) the same number on both scales
−40°C = −40°F.
14. 50°F is
Tap A, B, C or D.
Answer: C) 10°C
(50 − 32) × 5/9 = 10.
15. 70°F is about
Tap A, B, C or D.
Answer: A) 21°C
(70 − 32) × 5/9 ≈ 21.1.
16. 80°F is about
Tap A, B, C or D.
Answer: B) 27°C
A warm US summer afternoon for many towns.
17. 90°F is
Tap A, B, C or D.
Answer: A) 32°C
(90 − 32) × 5/9 = 32.
18. 98.6°F as a textbook mouth average is about
Tap A, B, C or D.
Answer: B) 37°C
Healthy people scatter around it.
19. 212°F is
Tap A, B, C or D.
Answer: B) 100°C at standard boil
Same kettle, two labels.
20. 32°F is
Tap A, B, C or D.
Answer: B) 0°C
Ice on the pond.
21. A 160°C oven is
Tap A, B, C or D.
Answer: D) 320°F
1.8 × 160 + 32 = 320.
22. A 200°C oven is
Tap A, B, C or D.
Answer: D) 392°F
1.8 × 200 + 32 = 392.
23. A 220°C oven is
Tap A, B, C or D.
Answer: C) 428°F
Hot pizza-ish territory on many boxes.
24. Gas mark talk in some UK ovens is
Tap A, B, C or D.
Answer: D) another scale — still convert the printed °C/°F on the recipe
Do not guess from “mark 6” without a chart.
25. A weather jump of 10°C is
Tap A, B, C or D.
Answer: D) 18°F
Differences: multiply by 1.8 only (no +32).
26. A weather jump of 5°C is
Tap A, B, C or D.
Answer: A) 9°F
Deltas skip the +32.
27. Body-temperature 38°C is about
Tap A, B, C or D.
Answer: A) 100.4°F
Fever talk uses both in different countries.
28. A fridge about 4°C is about
Tap A, B, C or D.
Answer: C) 39°F
Food-safety bands are often written in one scale.
29. A freezer about −18°C is about
Tap A, B, C or D.
Answer: B) 0°F
That is a common food-freezer target.
30. Kelvin is
Tap A, B, C or D.
Answer: B) Celsius + 273.15, not Fahrenheit
Science papers use K.
31. Absolute zero is
Tap A, B, C or D.
Answer: B) 0 K, about −273°C, not 0°F
Do not mix kitchen scales with kelvin.
32. A US forecast of 32°F means
Tap A, B, C or D.
Answer: D) freezing, not a warm 32°C day
Tourists mix this every winter.
33. A 32°C day is
Tap A, B, C or D.
Answer: B) about 90°F — hot for many cities
Same number, opposite comfort.
34. Mental shortcut: double °C and add 30 is
Tap A, B, C or D.
Answer: B) a rough °F guess, not exam-perfect
10°C → about 50; exact is 50 anyway.
35. Mental shortcut C ≈ (F − 30) / 2 is
Tap A, B, C or D.
Answer: C) rough, not (F − 32) × 5/9
Use the real formula for medicine and ovens.
36. Adding 32 then multiplying by 1.8 for 20°C wrongly gives
Tap A, B, C or D.
Answer: A) a huge wrong oven-like number
Order: multiply first.
37. This page does not
Tap A, B, C or D.
Answer: A) control your weather app’s default scale
Change °C/°F in the phone settings.
38. A meat-probe 74°C (example doneness talk) is about
Tap A, B, C or D.
Answer: A) 165°F
Food-safety charts pick the scale they print.
39. Wind chill is
Tap A, B, C or D.
Answer: B) how cold it feels, still quoted in °C or °F
The formula on this page is for actual air temperature.
40. Heat index / “feels like” is
Tap A, B, C or D.
Answer: A) humidity-adjusted, not a new conversion of 1.8
Convert the real thermometer first.
41. A baby-bath “warm not hot” rule is
Tap A, B, C or D.
Answer: C) about safety, not a single magic °F on this quiz
Use a bath thermometer the paediatric nurse named.
42. A fever strip in °F vs a clinic °C ear gun
Tap A, B, C or D.
Answer: D) can disagree; the scale is only one issue
Follow the device you have.
43. 100°F is about
Tap A, B, C or D.
Answer: B) 38°C
(100 − 32) × 5/9 ≈ 37.8.
44. 0°F is about
Tap A, B, C or D.
Answer: C) −18°C
(0 − 32) × 5/9 ≈ −17.8.
45. A UK heat-health alert in °C should not be
Tap A, B, C or D.
Answer: B) read as if the number were °F
36°C is not a mild 36°F.
46. Cooking chocolate “40–45°C” is
Tap A, B, C or D.
Answer: A) 104–113°F, not 40°F
Temper charts use precise °C.
47. This explainer cannot
Tap A, B, C or D.
Answer: A) change what your oven dial prints
If the dial is unmarked, use an oven thermometer.
48. A difference of 1°C is
Tap A, B, C or D.
Answer: C) 1.8°F, not 1°F
Deltas never add 32.
49. The official source for “celsius to fahrenheit” (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.
50. The official source for “celsius to fahrenheit” (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.
51. The official source for “celsius to fahrenheit” (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.
52. The official source for “celsius to fahrenheit” (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.
53. The official source for “celsius to fahrenheit” (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.
54. The official source for “celsius to fahrenheit” (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.
55. The official source for “celsius to fahrenheit” (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.
56. The official source for “celsius to fahrenheit” (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.
57. The official source for “celsius to fahrenheit” (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.
58. The official source for “celsius to fahrenheit” (learn desk, item 10) 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.
59. The official source for “celsius to fahrenheit” (learn desk, item 11) 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.
60. The official source for “celsius to fahrenheit” (learn desk, item 12) 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.
61. The official source for “celsius to fahrenheit” (learn desk, item 13) 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.
62. The official source for “celsius to fahrenheit” (learn desk, item 14) 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.
63. The official source for “celsius to fahrenheit” (learn desk, item 15) 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 “celsius to fahrenheit” (learn desk, item 16) 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.
65. The official source for “celsius to fahrenheit” (learn desk, item 17) 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.
66. The official source for “celsius to fahrenheit” (learn desk, item 18) 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.
67. The official source for “celsius to fahrenheit” (learn desk, item 19) 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.
68. The official source for “celsius to fahrenheit” (learn desk, item 20) 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.
69. The official source for “celsius to fahrenheit” (learn desk, item 21) 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.
70. The official source for “celsius to fahrenheit” (learn desk, item 22) 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.
71. The official source for “celsius to fahrenheit” (learn desk, item 23) 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.
72. The official source for “celsius to fahrenheit” (learn desk, item 24) 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.
73. The official source for “celsius to fahrenheit” (learn desk, item 25) 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.
74. The official source for “celsius to fahrenheit” (learn desk, item 26) 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.
75. The official source for “celsius to fahrenheit” (learn desk, item 27) 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.
76. The official source for “celsius to fahrenheit” (learn desk, item 28) 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 “celsius to fahrenheit” (learn desk, item 29) 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.
78. The official source for “celsius to fahrenheit” (learn desk, item 30) 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.
79. The official source for “celsius to fahrenheit” (learn desk, item 31) 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.
80. The official source for “celsius to fahrenheit” (learn desk, item 32) 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.
81. The official source for “celsius to fahrenheit” (learn desk, item 33) 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 “celsius to fahrenheit” (learn desk, item 34) 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 “celsius to fahrenheit” (learn desk, item 35) 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.
84. The official source for “celsius to fahrenheit” (learn desk, item 36) 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 “celsius to fahrenheit” (learn desk, item 37) 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 “celsius to fahrenheit” (learn desk, item 38) 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.
87. The official source for “celsius to fahrenheit” (learn desk, item 39) 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.
88. The official source for “celsius to fahrenheit” (learn desk, item 40) 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.
89. The official source for “celsius to fahrenheit” (learn desk, item 41) 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.
90. The official source for “celsius to fahrenheit” (learn desk, item 42) 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.
91. The official source for “celsius to fahrenheit” (learn desk, item 43) 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.
92. The official source for “celsius to fahrenheit” (learn desk, item 44) 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.
93. The official source for “celsius to fahrenheit” (learn desk, item 45) 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.
94. The official source for “celsius to fahrenheit” (learn desk, item 46) 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.
95. The official source for “celsius to fahrenheit” (learn desk, item 47) 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.
96. The official source for “celsius to fahrenheit” (learn desk, item 48) 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.
97. The official source for “celsius to fahrenheit” (learn desk, item 49) 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.
98. The official source for “celsius to fahrenheit” (learn desk, item 50) 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.
