™How to use this calculator
Model a starting amount, month-end contribution, nominal annual rate and time horizon under constant-return assumptions. Change one assumption at a time, compare the result and consider what the formula leaves out.
Investing · Core
Compound Growth Calculator
Model a starting amount, month-end contribution, nominal annual rate and time horizon under constant-return assumptions.
See what time can doExplore the three calculators
EXPLORE THE ASSUMPTIONS
Load a worked example, then change any input. Example B changes one assumption from A. These are teaching examples, not forecasts.
Scenario A
ILLUSTRATIVE RESULTS
Total contributed$40,000.00
Illustrative growth$23,367.82
Illustrative ending value$63,367.82
What this result meansSee how starting capital and recurring month-end additions may compound. Uses a constant nominal annual rate divided by 12, monthly compounding and contributions at each month-end. Taxes, fees and volatility are omitted.
Formula and assumptions
Future value combines monthly compounded principal with a month-end contribution series using the annual rate divided by 12. Results are simplified illustrations and may exclude taxes, changing rates, liquidity, spreads, market impact, assignment, broker rules or other real-world factors.
Common questions
Does this calculator use live market data?
No. Every value comes from the assumptions you enter. A ticker symbol, when shown, is only a label.
Can I make a trade based on this result?
The result is an educational illustration, not a recommendation or a complete analysis. Verify current facts, account rules, costs and risks independently.
Why might the actual result be different?
Real outcomes can be affected by execution price, spread, slippage, fees, taxes, liquidity, volatility, financing costs, corporate actions and changing market conditions.
Educational illustration only. This calculator does not use live market data and does not provide investment, trading, tax or legal advice. Verify formulas, rules, fees and product details with current primary sources and regulated providers before acting.