Weighing Tofu?

Hey guys!

Quick question: Where in the water absorption process do you all weigh tofu out? This week was my first ever week working with tofu (and I loved it!). The package of tofu I bought said it contained 3.5 servings of 3oz.

I'm now 3 servings into my tofu block and I have a good 4oz left. If I had been weighing it correctly, I'd only have half a serving left (1.5oz). So, I was short changing myself this entire time, presumably because I weighed the tofu while it was water logged...

So, when do you guys weigh your tofu? I wish there were a more accurate way to do this.

Thanks!