Lease Mileage Calculator View Calculator Find how if you are likely to drive more miles than your lease allows and how much you will have to pay for the excess miles when the lease ends. Enter the annual miles allowed, the charge for excess miles as stated in your lease, and car's current odometer reading and this calculator will project excess miles and anticipated charges at lease end. You can also see how to adjust your driving for the remainder of the lease to avoid going over the allowed miles and paying a mileage charge. Learn more about putting this calculator or other calculators on your website.