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Investment Growth Calculator

Project an investment forward with compounding and see when it doubles.

About Investment Growth Calculator

Compounding growth is exponential, not linear: the increase in the final period is far larger than in the first. The doubling figure comes from the logarithmic form and is the quickest sanity check on whether a growth rate is plausible. Capacity and budget plans built on linear extrapolation understate compound investment growth badly over a three-to-five year horizon.

Formula

Investment Growth

Projected = current × (1 + growth rate)^periods

Current investment value
Starting value
growth rate
Compound growth per period
periods
Number of compounding periods

Worked example

With the default values below, Investment Growth Calculator returns Projected Value of 193,484.22. Change any input above and every figure here is recalculated in your browser.

Inputs used

Current investment valueminimum 0
50,000
Growth per periodaccepts -50–200 %
7 %
Number of periodsaccepts 1–100
20

Results

Projected Value
193,484.22
Total Growth
286.97%
Absolute Increase
143,484.22
Periods to Double
10.24
Average Increase per Period
7,174.21

Step by step

  1. 1Values used
  2. 2Investment Growth
  3. 3Projected Value= 193,484.22
  4. 4Total Growth= 286.97
  5. 5Absolute Increase= 143,484.22
  6. 6Periods to Double= 10.24
  7. 7Average Increase per Period= 7,174.21

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax or fees or charges into account.
  • Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • This is an estimate for general information and not professional financial, tax or legal advice. See the full disclaimer for the limits that apply to this kind of calculator.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

How is Investment Growth calculated?

Projected = current × (1 + growth rate)^periods Compounding growth is exponential, not linear: the increase in the final period is far larger than in the first. The doubling figure comes from the logarithmic form and is the quickest sanity check on whether a growth rate is plausible.

Why does Investment Growth matter?

Capacity and budget plans built on linear extrapolation understate compound investment growth badly over a three-to-five year horizon.

What values do I need to enter?

This calculator takes 3 inputs: Current investment value, Growth per period, Number of periods. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.

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