I began sending these Excel mortgage calculators to all of my new clients several months ago and the reviews have been very positive.  They are separated by program type to properly calculate loan amounts and PMI - this is particularly valuable for FHA loans.  One important reason to use these calculators when house shopping is to determine the true cost of each property.  Sometimes the less expensive house may cost more on a monthly basis due to higher taxes.  If you find these useful, please give me a call or submit a request for a good faith estimate for your scenario.