Signal Lab

ROI Calculator

A single-period return calculator: gain versus capital outlay.
It measures ROI for one period — not annualised (use CAGR for compound annual).
Use it for a quick go/no-go on a one-shot outlay before you build a full cash-flow model.

Investment & Return What-ifs

Your numbers stay in this browser. Export only — nothing is uploaded. Illustrative, not financial advice.

ROI (return on investment) — gain versus capital outlay for a single period. Not annualised — use the CAGR Calculator when you need a compound annual rate.

Initial investment and final value

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Gain and return

Absolute gain, ROI %, and break-even value (= initial).

Equations

  • AbsoluteGain = Final − Initial
  • ROI = (Final − Initial) ÷ Initial · not annualised
  • BreakEvenValue = Initial

How this is calculated
  • ROI (return on investment) = (Final − Initial) ÷ Initial — a simple period return, not a CAGR
  • Absolute gain = Final − Initial
  • Break-even value = the initial outlay (gain is zero when Final equals Initial)

Illustrative — not financial advice. For multi-year annualised growth use CAGR.

Take it with you

Get the worked example workbook in Excel — type your own numbers into it.

The Excel is the worked example workbook — type your own numbers into it. Stays on your device.