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doomath Calculator

Savings Growth Planner

Play with time, contributions and a modeled return to see where your money could go—and exactly where the result comes from.

savings

Build the scenario

$
$
%
A scenario assumption, not a promise.
years
Projected balance$21,685after 5 years
Modeled growth$2,685above money contributed

Milestones

Watch the curve develop
Year 1Balance after contributions and modeled growth.
$4,735
Year 2Balance after contributions and modeled growth.
$8,661
Year 3Balance after contributions and modeled growth.
$12,787
Year 4Balance after contributions and modeled growth.
$17,125
Year 5Balance after contributions and modeled growth.
$21,685
Calculation

How we got there

Starting moneyAlready in the account at the beginning.
$1000.00
New contributions$300.00 × 60 monthly contributions.
$18000.00
Modeled growthProjected balance minus starting money and contributions.
$2685.18
Projected balanceAfter 5 years at a modeled 5.00% annual rate.
$21685.18
Calculator guide

How to use the Savings Growth Planner

Explore how starting savings, monthly contributions, time and a modeled return combine over time.

01Set inputsChoose values, units and assumptions.
02Apply the modelEach month: balance = previous balance × (1 + monthly rate) + monthly contribution.
03Read the resultCheck the output against the assumptions before using it.
menu_book

What this calculator does

The planner simulates the account month by month and separates starting money, new contributions and modeled growth so the effect of time is visible.

functions

Formula & method

Each month: balance = previous balance × (1 + monthly rate) + monthly contribution.

fact_check

Assumptions & notes

  • The return is a scenario assumption, not a guarantee.
  • Monthly contributions are modeled at the end of each month.
  • Taxes, fees and account-specific rules are not included.