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The Kelvin temperature system uses the same temperature increment as Celsius, but 0 Kelvin designates absolute zero (-273.15°C). The Fahrenheit system is widely used to measure temperature in English-speaking countries. Its zero point is -17.78°C, one degree corresponds to 5/9 degrees Celsius. The Rankine scale starts at absolute zero and uses the degree increment of Fahrenheit.
Calculation basis for this temperature calculator:
1 K difference is equivalent to 1°C difference; 0 K = -273.15°C
1°F difference is equivalent to 5/9°C difference; 0°F = -17.8°C
1°Ra difference is equivalent to 5/9°C difference; 0°Ra = -273.15°C
The result is rounded off to the second decimal place.
On 1 July 1959, the inch was internationally standardized at 2.54 cm; the other units (foot, yard, mile) are based on the inch in the ratio 63,360:36:3:1.
Calculation basis for this length calculator:
1 m = 1000 mm = 0.001 km
1 in. = 0.0254 m.
1 in. = 1 ft./12 = 1 yd./3x12 = 1 mi./1760x3x12
The result is rounded off to the third decimal place.
In 1960 the pound (avoirdupois) was standardized for the USA, Canada and the UK at 453.59237 g, the ounce and gram are derived from this (1/16 each). The grain is an old English weight.
Calculation basis for this weight calculator:
1 g = 0.001 kg = 0.000001 t
1 g = 39.37008 gr
1 lb. = 453.59237 g
1 dr. = 1 oz./16 = 1 lb./256
The result is rounded off to the third decimal place.
The North American and British volume measurement systems are based on different-sized gallons. The fluid ounce is derived differently in each case (US 1/128, Imp. 1/160).
Calculation basis for this volume calculator:
1 l. = 1,000 ml.
1 l. = 35.19515715 fl.oz. (Imp.)
1 l. = 33.81402334 fl.oz. (US)
1 l. = 0.219969248 gal. (Imp.)
1 l. = 0.264172052 gal. (US)
The result is rounded off to the third decimal place.
Error messages
Overflow appears when the value to be displayed is too large for the display field. The other displayed values remain valid.
NaN (Not a Number) appears when an invalid number was entered in one of the input fields, most commonly an entry containing an incorrect decimal character (e.g. point and not comma), a letter or a thousands separator.