For small physical quantities: Name Symbol Meaning deci d 10 or 10-1 centi C or 100 milli 1000 or 10-3 or 10-6 1 000 000 n or pico or For large physical quantities: Name Symbol Meaning kilo k 1000 or 103 M 1 000 000 or 106 giga 1 000 000 000 or 109 tera T or