The same math from the book, live. Move the sliders to match your own age and plan — nothing you enter here is saved or sent anywhere.
Enter your age and a monthly amount. This runs the same year-by-year math behind every chart and table in the book — monthly contributions, compounding at your chosen return.
Assumes the same monthly amount invested every month with no changes, growing at a constant average return compounded monthly. Real markets go up and down along the way — this is a planning estimate, not a promise, and nothing here is investment advice.
The 110-minus-your-age formula from the book, live. Move the slider to your own age.
110, minus your age, is the percentage in stocks — the rest goes to bonds. A starting point from Chapter 12, not a rule that fits every situation.