There are rice cookers that can weight the rice then add water themselves. You put the rice in and set the time, it will add water automatically when it's time to cook.
Umm..... maybe get a better one that doesn't burn the bottom?
After decade of using the same $30 rice cooker, last month I grabbed an Induction Rice Cooker that's on sale for $119 (down from $199). It was LIFE CHANGING! Can't believe how awesome it is. It can cook rice, soup, porridge, steam, reheat, even bake cake. And it do ALL of that PERFECTLY without ever burning a thing.
Maybe my rice cooker isn't expensive enough. It's a mid range one that does a pretty good job, but if I leave it on warm for a long while after finishing the rice turns to shit. I buy more expensive/good rice and don't like it getting ruined.