Daily Micro-Savings Growth Calculator

Turn spare change into tangible savings goals. Enter a daily deposit amount, the number of days you plan to contribute, and any days you expect to skip to see the balance, contributions, and interest generated by daily compounding.

How much you plan to transfer every day into savings.
Enter the APY or effective annual rate offered by your savings account.
Length of your challenge or saving streak in days.
Leave blank if you expect to hit every day; otherwise enter the number of skipped deposits.
Seed amount already saved before this challenge begins.

Savings projections only. Actual returns depend on bank policies and interest credit schedules.

Examples

  • Challenge saver: $3.50 daily, 4.25% APY, 180 days, 6 skipped days, $75 starting balance ⇒ Projected savings balance: $704.09. New contributions: $609.00. Interest earned: $20.09.
  • One-year habit: $5.00 daily, 5.10% APY, 365 days, no missed days, $0 start ⇒ Projected savings balance: $1,928.20. New contributions: $1,825.00. Interest earned: $103.20.

FAQ

Can I model weekly or biweekly deposits?

Yes. Convert the amount to an equivalent daily value (for example, divide a weekly transfer by seven) and set skipped days so only the appropriate number of deposits occur.

What if the interest rate changes?

Update the annual rate when your bank adjusts the APY or run multiple scenarios to build a best-case and worst-case projection.

Does the starting balance count as a new contribution?

No. The calculator treats it as existing savings so the "New contributions" line only includes the deposits made during the horizon.

Additional Information

  • Interest compounds daily using rate ÷ 365. If your bank compounds monthly, convert the APY to an equivalent daily rate before entering it.
  • Missed days simply remove deposits from the end of the schedule; the remaining balance keeps earning interest on prior contributions.
  • Combine the output with the Monthly Savings Contribution calculator to see how the daily habit fits your broader budget.

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