Does anyone use JuiceCalculator? It's in a thread on ECF and I've used it since it's inception almost 2 years ago. IMO, it beats any other calculator out there. I'm sure it's been mentioned here before but I thought I would let the new DIYers know! Also, HotRod is always open to suggestions to add to it 
Here's the link: New Calculator to Try
Here's the link: New Calculator to Try