Home › Fun money math

A Dollar a Day Since Birth Calculator

See what saving a dollar a day, or any small amount, from the day someone was born would be worth today if invested.

Checked by the Money Years editors · Updated October 28, 2026 · How we calculate

Saving dollars a day from birth to age , invested at %.

Result
-

The power of starting at zero

A dollar a day is about $30 a month, a sum many families could set aside for a child. Invested at 7% from birth, it grows to around $13,000 by 18, about $37,000 by 30, and about $480,000 by 65. Only about $24,000 of that 65-year total is money actually put in; the rest is decades of compounding.

This is the case for starting early, whether it is a parent opening an account for a newborn or a young adult putting away a small amount from a first job.

Common questions

How much is a dollar a day for 18 years?

About $6,570 saved, or roughly $13,000 if invested at 7%.

Where can I invest for a child?

In the US, options include 529 plans, custodial UTMA/UGMA accounts and a custodial Roth IRA once the child has earned income.

This calculator gives estimates for planning. Real returns, rates and prices change, so treat the result as a guide rather than a promise. Read how we build and check our calculators.