ROI Calculator

Missing required values

Calculators cannot return meaningful results when one or more required inputs are empty.

Fix: Fill in every required field before calculating.

Wrong units or scales

Using the wrong units or mixing percent and decimal values can skew the result.

Fix: Double-check that each field uses the expected unit, scale, or percentage format.

Unrealistic ranges

Extreme or inconsistent inputs can produce output that looks broken even when the formula is correct.

Fix: Review the assumptions behind the numbers and correct any out-of-range values.

What's the difference between simple ROI and annualized ROI?

Simple ROI is the total percentage gain over the entire holding period — a 50% gain looks the same whether you held it 6 months or 10 years. Annualized ROI (aka CAGR) expresses the gain as the equivalent annual rate, which is what matters when comparing investments with different horizons.

Should I include fees and taxes in the inputs?

Add transaction fees to the 'initial investment' line and to the 'final value' subtraction. For ongoing fees and capital-gains tax, use the dedicated Net ROI section so you can see both gross and net figures side-by-side.

Can ROI be negative?

Yes — if the final value is below the initial investment, ROI is negative (a loss). The calculator handles negative numbers without special cases; the output simply shows a red loss indicator instead of a green gain.

How does ROI differ from IRR?

ROI is a single-period metric that treats all cash flows as happening at the beginning and end. IRR (Internal Rate of Return) handles multiple cash flows at different times — it's the right metric for investments with partial withdrawals, reinvested dividends, or variable contributions. Use our IRR tool for those cases.

Does the calculator adjust for inflation?

No — the output is nominal ROI. To get the real (inflation-adjusted) return, subtract the inflation rate over the holding period from the annualized ROI: real ROI ≈ nominal ROI − inflation.

Is the math identical across currencies?

Yes. ROI is a pure ratio calculation — the currency symbol is cosmetic. Just make sure the initial investment and final value are in the same currency; if you held a foreign asset, convert at the respective exchange rates first.