# Savings Growth Calculator

> Savings calculator: project how much your savings will grow with compound interest, deposits, and time to reach a future value. Free, runs in your browser.

- **Canonical URL:** https://boringtoolskit.com/savings-calc/
- **Category:** Finance & Investing
- **Evidence level:** authored-methodology
- **Reviewed:** August 2026
- **Last verified:** 2026-10-12
- **Privacy:** Inputs and results stay in this browser unless the page clearly labels an external request.

## How it works

Future value = principal × (1 + monthly rate)^n, where monthly rate = annual rate ÷ 100 ÷ 12 and n = years × 12. Compounding is applied monthly on a single starting amount.

## Worked example

With $5,000 at a 5% annual rate over 10 years, the monthly rate is 5 ÷ 100 ÷ 12 and there are 120 monthly periods, so future value = 5000 × (1 + 0.004167)^120.

## Assumptions

- Growth is modeled with monthly compounding on one starting amount; no recurring contributions are added.
- The annual rate and number of years are user-provided planning inputs.
- This is compound-growth math only, not investment advice, a prediction, or a guaranteed return.

## Common questions

### How does this savings calculator work?

It calculates future value as principal × (1 + annual rate ÷ 100 ÷ 12) raised to years × 12.

### Does it include monthly deposits?

No. It models growth on one starting amount only and does not add recurring contributions.

### What rate should I enter?

Enter the annual percentage rate you want to test. The calculator uses that rate and monthly compounding as user-provided assumptions, not a prediction.

## Related tools

- /simple-interest-calculator/
- /compound-interest/
- /savings-goal-calculator/

## Sources

- [Compound Interest Calculator](https://www.investor.gov/financial-tools-calculators/calculators/compound-interest-calculator)

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*Local planning estimate. Verify current terms, rates, and policies before acting.*