Visualize the power of compound interest. See how your money grows over time with regular contributions.
Formula
const p = inputs.principal; const r = inputs.rate / 100; const t = inputs.years; const n = inputs.compounds; const amount = p * Math.pow(1 + r/n, n*t); const contribution = inputs.monthly * 12 * t; const total = amount + (inputs.monthly * 12 * ((Math.pow(1 + r/n, n*t) - 1) / (r/n))); const interest = total - p - contribution; return { balance: Math.round(total), interest: Math.round(interest), contributions: Math.round(contribution + p), _chart: { type: 'pie', data: [{name: 'Principal', value: Math.round(p)}, {name: 'Contributions', value: Math.round(contribution)}, {name: 'Interest', value: Math.round(interest)}] } };Initial Deposit ($)
1,000
Monthly Contribution ($)
500
Interest Rate (%)
8
Years to Grow
20
Compounding Frequency
12
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Compound Interest Calculator estimates Future Balance, Total Interest Earned, Total Contributions from Initial Deposit ($), Monthly Contribution ($), Interest Rate (%), Years to Grow. Use it to compare scenarios and understand which inputs drive the biggest changes. Results are directional estimates — verify with current, authoritative sources before making financial, legal, or health decisions.
Use this finance calculator to compare scenarios before committing money, time, or a provider conversation.
The estimate combines Initial Deposit ($), Monthly Contribution ($), Interest Rate (%) and returns Future Balance, Total Interest Earned, Total Contributions.
If the result changes your decision, verify the current quote, rate, eligibility rule, or provider term before acting.
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This calculator provides estimates based on the inputs provided. It does not constitute financial advice, investment recommendations, or tax guidance. Past performance does not guarantee future results. Consult a qualified financial advisor, accountant, or tax professional before making financial decisions.
Reviewed by the CalculateThis.ai editorial team. Updates: check back for latest parameters. Tools are for estimation only — verify with current provider terms.