ROI-Rechner

Use the free online ROI-Rechner tool. Fast, private and easy to use — runs entirely in your browser. Part of our Finanz-Rechner collection.

Einfacher-Zins-Rechner

Principal Annual rate (%) Time (years)

Work out interest earned or owed with the simple interest formula I = P x r x t.

Amount invested Final value Years held (optional)

Measure the return on an investment, with the annualized rate when you enter the holding period.

Starting value Ending value Years

Find the compound annual growth rate of an investment between two points in time.

Fixed costs Price per unit Variable cost per unit

See how many units you must sell before a product starts making a profit.

Cost Selling price or Markup % (leave price blank)

Convert between cost, selling price, markup on cost and profit margin on price.

Goal amount Annual interest rate (%) Years to save

Find the monthly deposit needed to reach a savings target by a set date.

Monthly debt payments Gross monthly income

Compute your debt-to-income ratio, a key figure lenders review before approving credit.

Hourly rate or Annual salary Hours per week

Convert pay between hourly, weekly, monthly and annual amounts based on your working week.

Is the ROI-Rechner free to use?

Yes. The ROI-Rechner is completely free with no sign-up, no limits and no watermarks. You can use it as many times as you like.

Is the ROI-Rechner safe and private?

Absolutely. The ROI-Rechner runs entirely in your browser, so your data never leaves your device and nothing is uploaded to a server.

Do I need to install anything to use the ROI-Rechner?

No installation is needed. The ROI-Rechner works instantly online in any modern browser on desktop, tablet or mobile.

Does the ROI-Rechner work on mobile phones?

Yes. The ROI-Rechner is fully responsive and works smoothly on iPhone, Android and any other device.