The best calf workout to tone your legs are exercises that can be performed just about anywhere and are easy to do, especially if you have a busy lifestyle.  The heel raise is a powerful way of toning your calf muscle by concentrating your body weight on one leg.  

Balance yourself by standing on your right foot with your left foot behind your right calf.  Slowly raise up on the ball of your right foot, contracting your calf at the top of the lift. Relax and lower to the starting position. Read more here: