Calculate& Decide

Money & Finance calculator

Savings Goal Calculator

This calculator estimates the equal end-of-month contribution needed to grow current savings to a target balance.

Updated · Inputs stay in your browser

Educational estimate: This result is not financial, tax, legal, or investment advice. Check real terms and consider qualified advice for important decisions.

Enter your values

Choose the symbol used to display amounts.
Target future balance.
Amount already saved.
Use 0 if the balance earns no interest.
Time available to save.

Your values stay on this device. Nothing is sent to Calculate & Decide unless you deliberately use your device's share feature.

What this result means

This calculator estimates the equal end-of-month contribution needed to grow current savings to a target balance. The results panel explains the main number and the quantities that produced it, so you can check whether the estimate answers your real question.

Formula used

PMT = (Goal − Current × (1 + r)ⁿ) × r ÷ ((1 + r)ⁿ − 1). At a zero rate, PMT = (Goal − Current) ÷ n.

Step-by-step calculation

  1. Validate every required value and reject values outside the stated field limits.
  2. Convert rates and time periods to the units required by the formula.
  3. Calculate with full JavaScript number precision; do not round intermediate values.
  4. Round only the displayed result and explain the practical meaning.

Worked example

To grow $2,000 to $10,000 in 3 years at an estimated 3% annual rate, save about $207.65 at each month-end.

Assumptions and limitations

  • The entered annual rate is constant and compounds monthly.
  • Deposits occur at the end of every month.
  • The goal is a nominal amount; inflation, tax, and fees are excluded.

How to use this calculator

  1. Choose a currency symbol when the tool uses money.
  2. Enter values in the units shown beside each field.
  3. Select Calculate, then read both the main result and interpretation.
  4. Change one uncertain input at a time to understand sensitivity.
  5. Use Copy result or Share only when you choose to move the result outside this page.

Common mistakes

  • Leaving too little time and assuming the calculator can make the goal feasible.
  • Using a promotional rate that will not last.
  • Ignoring irregular expenses that interrupt planned contributions.

Frequently asked questions

What if my current savings already reach the goal?

The required monthly amount is shown as zero.

Can I use a 0% rate?

Yes. The remaining gap is divided evenly across the months.

Should I enter an optimistic return?

A conservative scenario is usually more useful, and testing several rates shows sensitivity.

Methodology and sources

Formula definitions and edge-case behavior are documented on our Methodology page. No external data is fetched by this calculator.

See the site-wide calculation methodology and editorial standards. Formula errors can be reported through the error-reporting instructions.

Published and reviewed .