ROI Calculator

About the ROI Calculator

Return on investment cuts through the noise: it tells you, as a simple percentage, whether something was worth the money you put in. From a marketing campaign to a property to a stock, ROI lets you compare very different investments on equal terms.

This ROI Calculator works out your return and annualized ROI from the amount invested and the amount returned, so you can judge performance and compare opportunities at a glance.

How to use the ROI Calculator

1. Enter the amount you invested.
2. Enter the amount you received back (or the current value).
3. Add the holding period for an annualized figure.
4. Read your ROI and annualized ROI instantly.

Key features of the ROI Calculator

• Calculates ROI as a clear percentage
• Annualized ROI for fair comparison over time
• Works for any type of investment
• Compare very different opportunities
• Calculated privately in your browser

How the ROI Calculator works

This calculator uses the established mathematical formulas that banks, lenders and financial institutions rely on — for interest, amortization, EMI, compounding, tax and investment growth. Where local rules apply (such as tax bands or GST/VAT rates), the tool follows the relevant published structure, and figures can be expressed in the currency you work in.

Every calculation runs in your browser, so the financial figures you enter stay completely private.

Tips & best practices

• Use annualized ROI when comparing investments held for different lengths of time — a 20% return over one year beats 20% over three.
• Include all costs in the amount invested, not just the headline price, for an honest figure.
• ROI ignores risk, so a higher return often comes with more of it — weigh both.

Standards & accuracy

Uses the same standard financial formulas as banks and lenders, with support for multiple currencies and international tax rules.

Disclaimer: results are estimates for general information only and are not financial advice. Rates, fees and tax rules change and vary by provider and jurisdiction. Confirm figures with your bank, lender or a qualified financial professional before making decisions.

Who uses the ROI Calculator?

• Measuring the return on a marketing spend
• Comparing investment opportunities
• Assessing a property or business decision
• Judging whether a project paid off

Privacy & security

The ROI Calculator runs entirely inside your web browser. Your data — whether that is a file, figures or text — is processed on your own device and is never uploaded to a server, stored or shared. There is no signup and no account, so you can use it as often as you like while keeping full control of your information. This makes it a safe choice even for confidential and sensitive work.

Why choose Toolinza?

• 100% free — no hidden charges, watermarks or usage caps.
• Private & secure — your data stays on your device.
• Standards-compliant — accurate results suitable for the UK, USA, Canada, Australia, EU, India, Pakistan, the Middle East and worldwide.
• Works everywhere — desktop, tablet and mobile.

Frequently asked questions