Most people don't need a lecture on why the US still uses Fahrenheit — they need to know what 180°C is in an oven that only shows °F. Here are the conversions that actually come up in daily life.
In the Kitchen
- 180°C (a common "medium oven") ≈ 350°F
- 1 cup ≈ 240 ml
- 1 ounce ≈ 28 grams
- 1 pound ≈ 454 grams (or roughly 0.45 kg)
While Traveling
- 1 mile ≈ 1.6 kilometers — useful for reading road signs abroad
- 1 foot ≈ 30 centimeters
- A comfortable travel temperature of 20°C is about 68°F
- 1 liter ≈ 0.26 US gallons — handy for fuel prices quoted per liter
For Fitness and Health
- 1 kilogram ≈ 2.2 pounds
- 5 kilometers ≈ 3.1 miles — the classic "5K" distance
- 1 meter ≈ 3.3 feet, useful for estimating height in either system
Why These Specific Numbers Stick
None of these conversions are exact round numbers — that's exactly why they're hard to do reliably in your head under pressure (mid-recipe, mid-trip, mid-workout). Rounding works for rough estimates, but anything that needs precision — baking ratios, medication dosing, engineering measurements — deserves an actual calculation rather than a mental shortcut.
Skip the Mental Math
When you need an exact figure rather than a rough estimate, our Unit Converter handles length, weight, temperature, and volume conversions instantly, both directions.