Convert by category
Pick a type to auto-fill the converter, or just type up top. Each one shows a quick real-world example.
See it, don't just read it
A picture makes the scale click. Here's what the most-searched conversions actually look like.
1 inch = 2.54 cm
A thumb's width ≈ 1 inch
1 cup = 236 ml
Standard US measuring cup
1 liter = 33.8 fl oz
A big water bottle
1 kg = 2.20 lb
A litre of water weighs ~1 kg
1 mile = 1.61 km
~15–20 min walk
0 °C = 32 °F
Body temp ≈ 37 °C = 98.6 °F
1 tbsp = 3 tsp = 14.8 ml
The recipe-saver
32 psi = 2.2 bar
Typical car tire pressure
500 kcal = 2,092 kJ
About one fast-food meal
150 hp = 112 kW
An average family car
1 GB = 1,000 MB
Roughly 250 phone photos
100 km/h = 62 mph
Highway speed, both worlds
Popular conversions, explained
Full guides with the formula, a quick reference table, and the mental-math trick — so next time you won't even need the tool.