What is decimal prefix?Decimal Prefix (also called: Metric Prefix) is a unit prefix used in the metric system that precedes a basic unit of measure to indicate a decimal multiple or a fraction of that unit. Conversion Samples1 k = 1000 1 M = 1000 k1 T = 1000000000000 1 P = 1000000000000000 1 n = 1000 p1 μ = 1000 n