exists and is an alternate of . 1 microgram is 0.000001 gram or 1 gram is 1000000 micrograms. Scroll down to related links and look at Weight and mass conversion.
Report Abuse. The major Credit cards (Visa Mastercard) almost always have 16 digits. The number will be less than 16 if the card is from a department store or gas station. CupCake Â· 8 years ago.
Visa and MasterCard both have 16 digits except for the American Express and other International cards which have 15 digits. For additional verification, sometimes, you are asked to provide the 3-digits that follow the card number on the signature line on the back of the card.