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💰 Financial · Rex's Toolbox

ROI Calculator

Return on investment, simple and annualized.

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Rex says

Money math without the spreadsheet headache. Plug in your numbers and I'll show you exactly where the dollars land.

Try a scenario

Click to load — tweak from there.

Inputs

Result

Total ROI

45.00%

Annualized return

13.19%

Net gain

$4,500

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Psst — share this and help Rex grow

One click, a permanent link with your numbers baked in.

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How to use this

  1. 1Enter initial cost ($).
  2. 2Enter final value ($).
  3. 3Enter holding period (years).
  4. 4Read your total roi on the right — it updates as you type.
  5. 5Hit Share to keep the scenario or send it to someone.

About this calculator

Compute return on investment from initial cost and final value, plus annualized return over the holding period.

FormulaROI = (Value − Cost) / Cost · 100%. Annualized = (Value/Cost)^(1/t) − 1.

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