Performance of adiabatic carry look-ahead adder using dynamic CMOS are studied and compared with Adiabatic carry look-ahead adder using Pass Transistor. adiabatic carry look-ahead adder using pass transistor has higher delay and lower power consumption while adiabatic carry look-ahead adder using dynamic CMOS logic has lower power dissipation and higher speed. adiabatic carry look ahead adder using dynamic CMOS are design using 180 nm CMOS technology and compared power dissipation and delay with respect to supply voltage and frequency.