Karl's Mortgage Calculator

Contains ads
6.99K reviews
Content rating
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About this app

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.

- Internet access required for adverts and analytics
Updated on
Jan 10, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
App activity, App info and performance, and Device or other IDs
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

6.62K reviews
A Google user
March 7, 2019
was 5 start until you removed the ability to choose the result suck as plunging in rate, term, payment to get loan amount, etc. I'm sure they feature was remove by accident. please bring the feature back and I'll raise my rating to 5 stars. UPDATE: Developer responded quickly with instructions for reverse calculations. Just what I needed. My favorite Mortgage calculator and upgraded to 5 Stars!
40 people found this review helpful
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Dr Karl Jeacle
March 7, 2019
Hi Tom, thanks for the updated review. Regards, Karl.
agatha allen
December 6, 2020
I love this app! It has everything I've been looking for in an amortization schedule. You can add extra payments (up to 50 1-time or adding extra to a group of payments) and immediately see the interest savings over the life of the loan. It calculates the payments given interest, loan amount, etc. The ads are unobtrusive at the bottom of the screen. I'm using a Samsung Galaxy S10.
72 people found this review helpful
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Kathy Koch-Childress
July 15, 2022
Amazing App!!! I have a set amount that I save weekly due to the fact that I get paid weekly. On occasion I don't pay as much principal due to an unscheduled financial event. The app allows me to make that change and recalculates. The app goes above and beyond. I needed to play with the settings for a while, no instructions, to figure out how to enter the info I wanted. But I did figure it out and Love it! I'm now on a count down to having my house paid off!!!
8 people found this review helpful
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What's new

- EU user consent for GDPR
- Minor fixes