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

This app has been updated by Apple to use the latest Apple signing certificate.

- 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
68 Ratings

68 Ratings

Kj246 ,

Easy to use

This app is simple enough to understand while giving you just the right amount of detail without overwhelming its user. I only wish that it could operate in landscape view to accommodate iPad technology. But that’s just a minor critique. Overall great app!👍🏾

Gt12fyi3 ,

This is superior!

I wanted to determine what the short, mid and long term financial benefits would be in refinancing our current mortgage now that interest rates have dropped. I wanted detailed comparisons, and some key questions answered, not just a semi-useless summary. I tried several online calculators... very awkward to get the level of detail needed. Irritating ads. Needed pencil and paper - to answer some key questions - awkward. I could have done it manually on my business calculator sitting idle in the kitchen draw.... big pain in the neck to get the level of detail needed in usable form.

Karl’s calculator was fantastically easy to use, user friendly, fast, and lays out all the amortization details on an easy to play with slider tool. The amortization tables, with loan balances, interest paid, etc. etc., charts, graphs, summary, and more are all there and intuitive to use.

So, I entered the variables for my current mortgage and wallowed within the results. Did the same for other scenarios. I emailed the detailed reports to myself, compared the .csv spreadsheets (all on my IPad). Don’t bother to look elsewhere for a mortgage calculator. Even if your needs are totally basic, you can’t beat this one.

niccilynnwilliams ,

This app is the truth!

I am buying my first home and wanted to be able to play with some scenarios after speaking with my lender. I was able to arrive at the same numbers we’d discussed and then play with them by adjusting different amounts. You can include PMI, based on your credit, and other relevant factors - or not. I feel some empowered! I can’t wait until my next conversation with the lender. She won’t know what hit her! Thank you so much for this invaluable tool.

App Privacy

The developer, Karl Jeacle, has not provided details about its privacy practices and handling of data to Apple. For more information, see the developer’s privacy policy.

No Details Provided

The developer will be required to provide privacy details when they submit their next app update.


  • Family Sharing

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

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