Mortgage Calculator
Build a simple mortgage calculator widget that takes in a loan amount, interest rate, loan term, and calculates the monthly mortgage payment, total payment amount, and total interest paid.
Requirements
- The user should be able to enter:
- Loan amount ($)
- Annual interest rate (%). This is also known as the annual percentage rate (APR)
- Loan term (in years)
- Using the inputs, the calculator should compute the following and display the results to the user:
- Monthly mortgage payment
- Total payment amount
- Total interest paid
- If a non-numerical string is entered into any input field, the calculator should display an error message. Additionally, the calculator should handle any other invalid inputs that may arise.
- Round the result amounts to 2 decimal places.
The last two requirements might not be given to you during interviews, you're expected to clarify.
The formula for calculating the monthly payment is:
M = P(i(1+i)n)/((1+i)n - 1)
- M: Monthly mortgage payment
- P: Loan amount
- i: Monthly interest rate (APR / 12)
- n: Total number of payments (loan term in years x 12)
Here's an example of Google's mortgage calculator (you might need to be in the US for it to appear):
Source
This question is adapted from FrontendEval's Mortgage Calculator.
Asked at these companies
Sponsor: GreatFrontEnd ProjectsWant to grow in your front end skills? Learn them the right way — build apps step-by-step while referencing best practices from Senior engineers.
- 80+ real world projects
- Professional specs and designs by top-tier product managers and designers
- Guides and reference solutions from Senior Big Tech engineers
- Use a front end skill roadmap to build from beginner to pro
Sponsor: GreatFrontEnd ProjectsWant to grow in your front end skills? Learn them the right way — build apps step-by-step while referencing best practices from Senior engineers.
- 80+ real world projects
- Professional specs and designs by top-tier product managers and designers
- Guides and reference solutions from Senior Big Tech engineers
- Use a front end skill roadmap to build from beginner to pro
Mortgage Calculator
Build a simple mortgage calculator widget that takes in a loan amount, interest rate, loan term, and calculates the monthly mortgage payment, total payment amount, and total interest paid.
Requirements
- The user should be able to enter:
- Loan amount ($)
- Annual interest rate (%). This is also known as the annual percentage rate (APR)
- Loan term (in years)
- Using the inputs, the calculator should compute the following and display the results to the user:
- Monthly mortgage payment
- Total payment amount
- Total interest paid
- If a non-numerical string is entered into any input field, the calculator should display an error message. Additionally, the calculator should handle any other invalid inputs that may arise.
- Round the result amounts to 2 decimal places.
The last two requirements might not be given to you during interviews, you're expected to clarify.
The formula for calculating the monthly payment is:
M = P(i(1+i)n)/((1+i)n - 1)
- M: Monthly mortgage payment
- P: Loan amount
- i: Monthly interest rate (APR / 12)
- n: Total number of payments (loan term in years x 12)
Here's an example of Google's mortgage calculator (you might need to be in the US for it to appear):
Source
This question is adapted from FrontendEval's Mortgage Calculator.
Asked at these companies
Sponsor: GreatFrontEnd ProjectsWant to grow in your front end skills? Learn them the right way — build apps step-by-step while referencing best practices from Senior engineers.
- 80+ real world projects
- Professional specs and designs by top-tier product managers and designers
- Guides and reference solutions from Senior Big Tech engineers
- Use a front end skill roadmap to build from beginner to pro
You must be signed in to view your saved versions
Loading editor
Loading editor
Loading editor
JavaScript Console
console.log() statements will appear here.