My wife asked some of the orthopedic surgeons she does anesthesia for and they all agree that a torn calf muscle is 4-6 weeks heeling time. Unless it's less severe that what they have said.
If you go to the THREAD Titled: AB INJURY Update, link included
YOU will find all kinds of useful information......and you might be able to contribute as well
It talks in great depth of the injury and the time frame and the actual severity of it including what the camera showed and it's the less serious one so the healing will be faster.