How to use this calculator
- Enter starting shares, starting share price, annual dividend per existing share, effective annual share-price growth (%), years.
- Choose a display currency, then select Calculate. Results also update after a brief pause while you edit.
- Read the result with the assumptions below. Export details or save a second scenario to compare your choices.
Formula and method
Assumptions and limitations
Annual reinvestment and fractional shares are allowed. Dividends per share stay constant. No dividend tax, fees or live security data.
Worked example
One hundred shares at 10 paying 1 per share annually, with no price growth and reinvestment, become 161.051 shares worth 1,610.51 after five years.
What the result means
Model annual reinvestment of a fixed per-share dividend with a chosen share-price growth assumption.
Common questions
How is the calculation performed?
At each year-end, grow the share price, calculate dividend on opening shares, and buy fractional shares with that dividend at the new price.
What does the model leave out?
Annual reinvestment and fractional shares are allowed. Dividends per share stay constant. No dividend tax, fees or live security data.
Methodology and transparency
Calculation specification reviewed on 2026-10-14. Mathematical implementation is tested against independent reference fixtures. This does not imply review by a licensed financial professional. Read the testing and precision policy.