Just order one of these (https://amzn.to/2LIxkxb or one of their other models, if you want) and plug it into the wall, or better, a 3-prong extension cord, then plug your 3d printer into it, and you'll get all the power consumption detail you'll need. Show your Mom, and she'll see what to charge you, if she's so inclined. To impress her, offer to pay without her asking.

Just order a Watt Electricity Usage Monitor or a similar model and plug it into the wall, or better, a 3-prong extension cord, then plug your 3D printer into it, and you'll get all the power consumption detail you'll need. Show your Mom, and she'll see what to charge you, if she's so inclined. To impress her, offer to pay without her asking.