Compound return calculator
Model a lump sum using a fixed compounding assumption.
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Understanding your calculation
Final value = principal x (1 + nominal annual rate / periods per year)^(periods per year x years). No contributions, taxes or fees are included. Negative rates are supported; the model is not a promised return.
- Enter your own values and choose the applicable calculation options.
- Review the breakdown and assumptions; change one input to compare a scenario.
- Download the calculation CSV to retain your inputs and result for independent checking.
Limits and checks
Inputs are validated locally. Results are estimates using the stated model, without live market data, automatic tax classification or personalized financial advice.
Frequently asked questions
What assumptions does the compound return calculator use?
Final value = principal x (1 + nominal annual rate / periods per year)^(periods per year x years). No contributions, taxes or fees are included. Negative rates are supported; the model is not a promised return.
Is my content sent to a server?
No. Processing runs inside your browser. Optional editor recovery saves a draft on this device only. Read the privacy policy.
Can I rely on this as a financial decision?
No. Check the model, inputs and assumptions independently. Real borrowing costs, returns, fees and trading losses can differ. Consult a qualified professional when appropriate.