Well, if you're on anything that will help collagen synthesis (deca, I believe, and def IGF), then you will recover quickly.
I can't gauge how bad it is off of your post, but does it creak or feel like a dry rubberband? If so, I'd keep from training legs for about 2 weeks. If it's only inflamed, then try a week then test it out with body weight at most for raises. Either way, training legs should be out of the question.
In the meantime, make sure you stretch that bitch out every day, like 5 times a day. Also, you can do calf raises by going up on two legs then come down on 1. Do this about 3 sets of 10 - 15 reps each day.
I strained my achilles twice. A lot of times it's a function of changing shoes (elevated heel) or tight calves.