volt electric-potential V volt milli electric-potential mV volt micro electric-potential μV amp electric-current A amp milli electric-current mA amp micro electric-current μA amp nano electric-current nA amp pico electric-current pA ohm electric-resistance Ω ohm milli electric-resistance mΩ ohm micro electric-resistance μΩ siemens electric-conductance S siemens milli electric-conductance mS siemens micro electric-conductance μS siemens nano electric-conductance nS second time s second milli time ms hertz time Hz meter length m meter centi length cm meter milli length mm meter micro length μm gram mass g gram kilo mass kg gram milli mass mg gram micro mass μg unknown unknown unknown