A quick way to measure body fat/muscle mass for each body compartment is by using those commercial health scale.. Just purposely go to a commercial gym (should have one) and say u wanna take up their trial. they will intro you to the gym and let you assess ur body composition and print out the report for u free.. after a month or so just try at another gym for benchmarking again.

@Armesh I once gained 9kg when beginner stage in 3 months, out of it ~6kg were muscles and was taking mass gainer. And i have fortnightly report to track the progress. its possible at early stages

Monitor your progress objectively. Find someone who can take your body composition (7 site skinfold measurements) every month or two, ideally someone who is very experienced with this procedure. Make sure they take at least 2 if not 3 skinfold measurement from each site (see techniques). Take an accurate body weight at the same time of day, each time you test, so you may more accurately calculate and compare lean weight and fat weight along with your body composition over time. On this same day, you may also want the tester to take circumference measurements of various body parts (eg.: chest, waist, arm, thigh calf, etc.). If you are not making lean body weight increases or gaining too much body fat, trouble shoot your program and make the appropriate changes to your program right away. Continue with these changes until your next body comp test.