Interested in a Fuel Efficient Car? Estimate how many months it may take to recover the out-of-pocket costs when buying a more efficient vehicle. You are viewing this website at a small screen resolution which doesn't support calculators. Click here to view this calculator. Related Content Avoiding Cognitive Decline Try these activities to keep your brain sharp. Trends in Charitable Giving Some people may want a more advanced gifting strategy that can maximize their gift and generate potential tax benefits. The Financial Literacy Crisis Many Americans are operating their personal finances with only the barest minimum of knowledge.