Unit Guides
Some conversions go wrong not because the arithmetic is hard but because two different units share a name. These guides explain which unit you are actually holding, and what it costs to pick the wrong one.
Ton vs Tonne
A US short ton is 2,000 pounds (907.18 kg), a UK long ton is 2,240 pounds (1,016.05 kg), and a metric tonne is 1,000 kilograms (2,204.62 lb).
US Gallon vs Imperial Gallon
A US gallon is 3.785411784 litres and an imperial (UK) gallon is 4.54609 litres, making the imperial gallon about 20.1 percent larger.
Nautical Mile vs Mile
A nautical mile is 1,852 metres, about 15 percent longer than the statute mile of 1,609.344 metres, and equals one minute of latitude.
Calorie vs Kilocalorie
One food Calorie is one kilocalorie, equal to 1,000 small calories or 4,184 joules.
MB vs MiB
A megabyte is 1,000,000 bytes while a mebibyte is 1,048,576 bytes, and the gap grows with each prefix until a 1 TB drive reports as 931 GB.
Cup Sizes Explained
A US customary cup is 236.59 mL, a US legal cup is 240 mL, a metric cup is 250 mL and a historic imperial cup is 284 mL.
Fluid Ounce vs Ounce
A US fluid ounce is 29.5735 millilitres of volume, while an ounce is 28.3495 grams of mass; there is no fixed conversion between them.
Troy Ounce vs Ounce
A troy ounce is 31.1034768 grams, roughly 9.7 percent heavier than the avoirdupois ounce of 28.349523125 grams used for everything else.
Oven Temperature Chart
Gas mark 4 is 180 °C conventional, 160 °C fan, or 350 °F, the setting most general baking recipes assume.
Height Conversion Chart
170 cm is 5 ft 6.9 in, 175 cm is 5 ft 8.9 in, and 180 cm is 5 ft 10.9 in.
Weight Conversion Chart
70 kg is 154.3 lb, which is 11 st 0.3 lb; 80 kg is 176.4 lb, or 12 st 8.4 lb.
Cups to Grams for Baking
One US cup holds about 125 g of plain flour, 200 g of granulated sugar, 227 g of butter and 340 g of honey.