Financial

Investment Calculator

Forecast investment growth, contributions, target progress, and required monthly savings.

Inputs

Defaults are prefilled so the result is visible immediately.

Starting amount

Monthly contribution

Expected annual return%

Investment periodyears

Target amount

Results

Results update as the calculator inputs change.

Projected value

$321,044.41

Investment gain

$186,044.41

Total contributions

$120,000.00

Progress to target

64.21%

Monthly needed for target

$843.53

Starting amount$15,000.00

Contributions$120,000.00

Growth$186,044.41

Formula and Assumptions

Future value combines starting amount growth and an annuity of recurring contributions.

The target comparison turns the projection into a savings decision instead of only a future value.

Returns are assumed constant and do not include taxes, fees, or volatility.

Reference Upgrade

Built from the Calculator.net model, with added context.

Live validation and instant result updates instead of a submit-only workflow.

Multiple decision metrics are shown together, not only the primary answer.

Formula notes and assumptions are visible on the page so the math is easier to audit.

Reference Model

Modeled after the input style and primary output on Calculator.net's Investment Calculator.

The page keeps the math in one place and exposes the assumptions beside the result.

Default inputs: startingAmount=15000, monthlyContribution=500, returnRate=7, years=20, targetAmount=500000