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Money lab · Calculator

What can time change?

Build a hypothetical saving or investing scenario. The rate is an assumption—not a prediction or guaranteed return.

01

Set the scenario

Use invented amounts. We do not need personal information.

02

Read the result

Hypothetical ending amount

—
You put in—
Assumed growth—

Not a prediction. The calculator uses the same assumed rate every period. Real returns can change, fees and taxes may apply, inflation affects buying power, and investments can lose money.

Three experiments to try

  1. Set the rate to 0%. What part of the result comes only from your habit?
  2. Keep the contribution the same and change the years. What does time do?
  3. Try a lower and higher assumed rate. How much does uncertainty change the answer?