Standardized in 1832 from British Empire units. Based on English units before 1826 imperial system. Defined in terms of meter and kilogram since 1893
Weight equals mass multiplied by gravitational acceleration (g = 9.8 m/s²). Weight is measured in Newtons (N), mass in kilograms (kg). Gravitational acceleration can be expressed in meters per second squared (m/s²)
1 ton equals 907,184,740 milligrams. Conversion formula: milligrams = tons × 907,184,740
1 kilogram equals 2.204623 pounds. Formula: pounds = kilograms × 2.204623. More precise formula: pounds = kilograms × 2.20462262185
1 pound equals 0.453592 kilograms. Conversion formula: kilograms = pounds ÷ 2.204623. Quick shortcut: divide pounds by 2, then subtract 10%
1 calorie equals 0.00013 kilograms. Conversion formula: kilograms = calories × 0.00013