Calculation
Interest
Estimate how a balance compounds, how regular deposits grow, or what a fixed loan costs each month. The yearly table shows the balance at the end of each year. Fees, tax, and extra payments are left out.
Quick start
- 1
Choose a mode
Compound grows a starting balance. Savings adds a deposit on a schedule. Loan solves a monthly payment.
- 2
Enter the amount, rate, and years
The rate is the annual percentage. The term can include a fraction of a year.
- 3
Read the projection
The headline is the future value or the monthly payment. The table shows the balance after each year.
Features
Compound interest
Grow a starting amount annually, quarterly, monthly, or daily.
Regular savings
Add a deposit every month or year and see the future balance.
Loan payment
Turn an amount, rate, and term into a monthly payment and the total interest.
Specifications
- Modes
- Compound, savings, loan
- Term
- Up to 80 years
- Currency
- USD, EUR, GBP, IDR, JPY
- Privacy
- Processed on the toolbox API
Use cases
- See what 10,000 becomes after 10 years.
- Plan a monthly deposit.
- Estimate a 30-year loan payment.
Frequently asked questions
Are fees included?
No. The figures are the math of the rate and the term, without fees, tax, insurance, or extra payments.