Calculate mortgage payments given principal, interest and term. Reverse calculate any one variable given the other three.

Enter a down payment amount or percentage and let the calculator show how large a mortgage you require.

See how the monthly payment changes when you factor in additional monthly or annual loan costs such as PMI, HOA, taxes and insurance.

The calculator supports Fixed and Adjustable Rate Mortgages (ARM) loans with up to five changes in interest rates. Interest-only mortgages loans are also supported.

You can pay off your mortgage early with extra payments. Add one-off, monthly and annual extra payments. Choose up to ten additional extra payment amounts and payment periods and the calculator will show how much money you can save on the loan.

Choose from weekly to annual loan payments and adjust the compounding period from daily through annual periods. The calculator supports Canadian mortgages along with UK annual rest mortgages.

Multiple rounding options on loan calculations are also available. Choose between no rounding, round half up, half down, to even, to ceiling and to floor.

The calculator also supports the input and display of multiple currencies.

What's New

Version 2.2

- USDA loans
- new FICO ranges and MGIC rates
- updated CMHC rates
- show total/LTV in tables
- highlight current date in tables
- more currencies added
- iPhone X support
- bug fixes

Ratings and Reviews

4.4 out of 5

10 Ratings

10 Ratings

Love it


My husband and I owner finance land. Our customers are always wanting to know notes, down pmt. and how the interest thing will work.... so we calculate it and snap them a picture of it and it answers all their questions. So east to use. Looked at several other and they didn’t always work correct and eventually want to charge you huge fee to do the same thing this app does for free. Thank you Karl... wherever you are.

The Best


I have reviewed several Real Estate mortgage calculators. I have found Karl's to be the best so far. Easy to use and allows you to add insurance and taxes to get as close as possible to a mortgage payment as possible.

Love this app. I suggest


My broker told me of this app. Great app, suggestions to make better: when a loan is emailed it should include the name the loan was saved as. Also it'd be great if I could share the loan saved in the calculator with others who want to tweak the loan values as opposed to just emailing an HTML file.


Karl Jeacle
11.6 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2017 Karl Jeacle


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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