Cooking and Baking (Examples 1–10)
1. Convert a French recipe's flour weight
Problem: A French recipe calls for 250 g of flour. How many US cups?
Solution: 250 g ÷ 125 g/cup = 2 cups (spooned and leveled).
2. Convert oven temperature
Problem: A European recipe says "Bake at 200 °C." What is that in Fahrenheit?
Solution: (200 × 9/5) + 32 = 360 + 32 = 392 °F, commonly rounded to 400 °F.
3. Convert butter from grams to sticks
Problem: A recipe calls for 170 g of butter. How many US sticks?
Solution: 170 ÷ 113.398 = 1.499, so about 1.5 sticks (or 3/4 cup).
4. Convert a liquid volume
Problem: A US recipe calls for 1.5 cups of milk. How many mL?
Solution: 1.5 × 236.5882365 = 354.882 mL.
5. Convert tablespoons to mL
Problem: A recipe calls for 3 tbsp of oil. How many mL?
Solution: 3 × 14.78676478125 = 44.360 mL.
6. Convert a sugar amount
Problem: A recipe calls for 1 cup of granulated sugar. What is the weight in grams?
Solution: About 200 g (granulated sugar, scooped and leveled).
7. Convert a slow-cooker temperature
Problem: A slow cooker's "high" setting is about 300 °F. What is that in Celsius?
Solution: (300 − 32) × 5/9 = 148.89 °C.
8. Convert a baking pan size
Problem: A US recipe calls for an 8-inch square pan. What is that in cm?
Solution: 8 × 2.54 = 20.32 cm. Round to a 20 cm square pan.
9. Convert a beverage volume
Problem: A can of soda is 12 fl oz. How many mL?
Solution: 12 × 29.5735295625 = 354.88 mL.
10. Convert a food calorie value
Problem: A yogurt has 150 kcal. How many kJ?
Solution: 150 × 4.184 = 627.6 kJ.
Travel and Navigation (Examples 11–20)
11. Convert a road sign
Problem: A sign in Canada says "Toronto 120 km." How many miles?
Solution: 120 × 0.621371192237334 = 74.56 miles.
12. Convert a speed limit
Problem: A speed limit sign in Spain says "120" (km/h). How many mph?
Solution: 120 × 0.621371192237334 = 74.56 mph.
13. Convert a flight distance
Problem: A flight is 5,000 nautical miles. How many km?
Solution: 5,000 × 1.852 = 9,260 km.
14. Convert a bag weight
Problem: An airline allows 23 kg checked baggage. How many pounds?
Solution: 23 × 2.2046226218487757 = 50.71 lb.
15. Convert a liquid allowance
Problem: Airport security allows 100 mL of liquid. How many US fl oz?
Solution: 100 ÷ 29.5735295625 = 3.381 US fl oz.
16. Convert a hotel room temperature
Problem: A hotel thermostat in Europe is set to 22 °C. What is that in Fahrenheit?
Solution: (22 × 9/5) + 32 = 39.6 + 32 = 71.6 °F.
17. Convert an altitude
Problem: A hiking trail is described as reaching 2,500 m. How many feet?
Solution: 2,500 × 3.280839895013123 = 8,202 ft.
18. Convert a driving range
Problem: An electric car has 350 km of range. How many miles?
Solution: 350 × 0.621371192237334 = 217.48 miles.
19. Convert a time zone offset
Problem: A meeting is at 14:00 UTC. What time is that in New York (UTC−5)?
Solution: 14:00 − 5 hours = 9:00 AM Eastern Time.
20. Convert a fuel economy figure
Problem: A car consumes 6.5 L/100 km. How many US MPG?
Solution: 235.214583 ÷ 6.5 = 36.19 US MPG.
Fitness and Health (Examples 21–30)
21. Convert body weight
Problem: A person weighs 78 kg. How many pounds?
Solution: 78 × 2.2046226218487757 = 171.96 lb.
22. Convert height
Problem: A person is 1.75 m tall. How many feet and inches?
Solution: 1.75 × 39.37007874015748 = 68.90 inches = 5' 8.9".
23. Convert a running distance
Problem: A 5K race. How many miles?
Solution: 5 × 0.621371192237334 = 3.10686 miles.
24. Convert a pool length
Problem: A swimming pool is 25 meters. How many yards?
Solution: 25 × 1.093613298337708 = 27.34 yards.
25. Convert a heart rate
Problem: A cyclist's cadence is 90 RPM. How many Hz?
Solution: 90 ÷ 60 = 1.5 Hz.
26. Convert a calorie expenditure
Problem: A workout burns 500 kcal. How many kJ?
Solution: 500 × 4.184 = 2,092 kJ.
27. Convert blood pressure
Problem: A blood pressure reading is 120 mmHg. What is that in kPa?
Solution: 120 × 0.133322387415 = 16.00 kPa.
28. Convert blood glucose
Problem: A blood glucose reading is 110 mg/dL. What is that in mmol/L?
Solution: 110 ÷ 18.0182 = 6.105 mmol/L.
29. Convert a shoe size
Problem: A US men's shoe size 9. What is that in EU sizing?
Solution: Approximately EU size 42. Confirmation depends on the specific brand.
30. Convert a body measurement
Problem: A waist measurement of 32 inches. How many cm?
Solution: 32 × 2.54 = 81.28 cm.
Home and DIY (Examples 31–40)
31. Convert a room dimension
Problem: A room is 12 ft × 14 ft. What is that in square meters?
Solution: 12 × 14 = 168 ft². 168 × 0.09290304 = 15.607 m².
32. Convert a wood length
Problem: A board is 8 feet long. How many cm?
Solution: 8 × 30.48 = 243.84 cm.
33. Convert a paint quantity
Problem: A paint can covers 350 ft² per gallon. How many m² per liter?
Solution: 350 × 0.09290304 = 32.516 m² per gallon. Per liter: 32.516 ÷ 3.785411784 = 8.591 m² per liter.
34. Convert a soil volume
Problem: A garden bed needs 2 cubic yards of soil. How many cubic meters?
Solution: 2 × 0.764554857984 = 1.529 m³.
35. Convert a water heater capacity
Problem: A water heater holds 50 gallons. How many liters?
Solution: 50 × 3.785411784 = 189.271 L.
36. Convert a fence length
Problem: A fence is 200 feet long. How many meters?
Solution: 200 × 0.3048 = 60.96 m.
37. Convert a torque specification
Problem: A bolt requires 80 ft·lb of torque. What is that in N·m?
Solution: 80 × 1.3558179483314004 = 108.465 N·m.
38. Convert a pressure setting
Problem: A pressure washer operates at 2,000 psi. What is that in bar?
Solution: 2,000 × 0.0689475729316836 = 137.895 bar.
39. Convert an electrical load
Problem: An appliance draws 12 A at 120 V. How many watts?
Solution: 12 × 120 = 1,440 W = 1.44 kW.
40. Convert an insulation R-value
Problem: US insulation R-value R-13 (imperial). What is the approximate metric equivalent?
Solution: Approximate: R-13 (imperial) ≈ R-2.29 (metric) using the conversion R_SI = R_IP × 0.176110. Actual conversions depend on the specific material and thickness.
Science and Everyday (Examples 41–50)
41. Convert a light wavelength
Problem: Red light has a wavelength of 650 nm. How many Å?
Solution: 650 nm = 6,500 Å (since 1 nm = 10 Å).
42. Convert a memory size
Problem: A 512 GB SSD. How many GiB?
Solution: 512 × 0.9313225746154785 = 476.84 GiB. Windows would show this as "476 GB".
43. Convert a download speed
Problem: A 100 Mbps connection. How many MB/s?
Solution: 100 ÷ 8 = 12.5 MB/s.
44. Convert an astronomical distance
Problem: Proxima Centauri is 4.24 light-years away. How many km?
Solution: 4.24 × 9.4607304725808 × 10¹² km = 4.01 × 10¹³ km.
45. Convert a computer storage
Problem: A file is 5 MB. How many bits?
Solution: 5 × 8 × 10⁶ = 4 × 10⁷ bits = 40 megabits.
46. Convert a solar panel output
Problem: A 400 W solar panel in full sun for 5 hours. How many kWh?
Solution: 0.4 kW × 5 h = 2 kWh.
47. Convert a food label energy
Problem: A food label says 250 kcal and 1,046 kJ. Confirm they are consistent.
Solution: 250 × 4.184 = 1,046 kJ. Yes, consistent.
48. Convert a room's area
Problem: A 30 m² apartment. How many square feet?
Solution: 30 ÷ 0.09290304 = 322.92 ft².
49. Convert a liquid density
Problem: Honey has a density of about 1.42 g/mL. What is that in kg/m³?
Solution: 1.42 g/mL = 1,420 kg/m³.
50. Convert a geographic coordinate
Problem: A coordinate is 40° 44′ 54.3″ N. What is that in decimal degrees?
Solution: 40 + 44/60 + 54.3/3600 = 40 + 0.73333 + 0.01508 = 40.748417° N.