Calculators Using these online calculators is quick and easy. Simply complete, entering as much as you know about interest rates and dollar amounts and you'll be able to calculate how much vehicle you can afford, how much to save for retirement, savings for college, etc. Use them for reference and approximate amounts only - as actual dollars and yields will be affected by possible additional costs and market forces too various to be included as part of the calculation. Auto Loan Calculator Mortgage Calculator Million Dollars Rebate vs Finance Savings Calculator Zero Interest Comparison