The normal distribution is sometimes informally called the bell curve. However, many other distributions are bell-shaped (such as the Cauchy, Student's t, and logistic distributions).
One metric ton (also known as a 'Tonne') contains 1000 kg, or 2204 pounds. There are two other types of ton: One Imperial ton (or British ton) equals 2240 pounds, or 1016.3 kg. One short ton contains 2000 pounds, or 907.4 kilogrammes.
1kg = 1000g. 1000kg = 1 metric tonne. You can easily calculate the values if you know the component units. For example, if you have 2000 grams then following the values stated above, you can arrive at the value of 2 kg.