# Unit Converter: Mass / Weight (Gram, Tonne, Pound)

• Convert mass units such as Metric system, United States customary units / Imperial units, and Japanese units of measurement to each other.
• Round to the 14th decimal place.

### Metric system

 milligram mg gram g kilogram kg tonne t

### United States customary units / Imperial units

 grain gr dram dr ounce oz pound lb hundredweightUS cwt tonUS t / s.t. stoneUK st quarterUK qtr hundredweightUK cwt TonUK t / l.t.

### Japanese units of measurement

 momme 匁 ryō 両 kin 斤 kan 貫
* About the notation of "e": Numbers with many digits may be displayed as "1e9". This is a computer exponential notation, where “e” represents a power of 10.
1e3 = 103 = 1,000
1e6 = 106 = 1,000,000
1e9 = 109 = 1,000,000,000
1e-3 = 10-3 = 0.001
1e-6 = 10-6 = 0.000001
1e-9 = 10-9 = 0.000000001

## Mass / Weight conversion formula

### Metric system

$1t = 10^3kg = 10^6g$ $1g = 10^{3}mg$

### United States customary units / Imperial units

$1 lb = 0.45359237 kg$ $1 lb = 16 oz = 256 dr = 7000 gr$ $1 s.t. = 20 cwt^{US} = 2000 lb$ $1 l.t. = 20 cwt^{UK} = 80 qtr = 160 st = 2240 lb$

### Japanese units of measurement

$1\text{貫} = 6.25\text{斤} = 100\text{両} = 1000\text{匁} = 3.75 kg$ $1\text{斤} = 16\text{両} = 160\text{匁} = 600 g$ $1\text{両} = 10\text{匁} = 37.5 g$ $1\text{匁} = 3.75 g$