I actually used to use a spreadsheet to keep track, but finally broke down and just used less gear. My newest char is an ork heavy weapons specialist. Commlink on belt, medkit on back under jacket, wrist biomonitor, autopicker in a coat pocket. Typical loadout is a burst-fire modded Ruger inside in a shoulder holster, two spare clips on arm slides, 2 more loaded with Ex rounds strapped to his thighs under his pants, and 4 grenades, usually flash & incendiary, in his inside coat pockets.
For bigger firepower, a smuggling compartment in the back of his Hotspur has an AA16 and an Ares Alpha, more grenades, and a change of clothes to something less civilian and more SWAT. I figure if I need more firepower than the Ruger, I'm probably some place I'm not worried about being inconspicuous and might as well go in looking loaded for bear.