ROI Calculator

Worked example

1,000 invested becomes 1,200 — 20% ROI

Quick answer

Does ROI account for time?

No. This basic ROI is not annualized and does not account for investment duration.

What is the ROI Calculator?

Calculate return on investment from initial cost and final value. Use it when you have the required inputs and want a deterministic, repeatable result with the calculation method visible.

How to use this calculator

Enter the values requested by the tool, keep units and time periods consistent, resolve any validation message, calculate, then review the primary answer together with the displayed formula and supporting values.

Formula and method

This calculator uses a deterministic formula and shows the calculation breakdown with the result so the answer can be checked.

Worked example

1,000 invested becomes 1,200 20% ROI

Common mistakes to avoid

Check units, decimal points, percentages, signs, date/time order, selector choices, and rounding. For important decisions, verify the result against an independent source or qualified professional when appropriate.