The roi works like this: it calculates return on investment, annualized ROI from the holding period, and the break-even value. Everything happens on your device - the input never leaves your tab unless the tool clearly states it performs a server-side lookup.
How to use the ROI Calculator
Enter the amounts, rates or periods involved.
Check the compounding or tax assumptions shown beside each field.
Read the full breakdown, not just the headline number.
Vary one input to stress-test the plan.
Features
Calculate return on investment percentage free
Instant result, no page reload
Works in any modern browser, desktop or mobile
Free with no signup
Common mistakes to avoid
Mixing monthly and annual figures in one calculation
Forgetting taxes and fees that sit outside the model
Examples
Input
Result
Invested 500k, worth 780k after 18 months
ROI 56% · annualized ~35.3%
Best used for
Getting a reliable answer for roi without installing an app
One-off tasks done in under a minute from any device
Checking results before committing them to something important
Working on a phone where desktop software is unavailable
Privacy
Calculations run in your browser; enter figures only you can see.
Frequently asked questions
Why annualize?
56% in 18 months is weaker than 56% in 6 months - annualized ROI makes durations comparable.
How is annualised ROI different from total ROI?
Total ROI measures the whole holding period; annualised restates it as a per-year rate so a 40% gain over two years (about 18% annualised) compares fairly against a 25% one-year gain.
What is the break-even value shown?
The final value at which the investment returns exactly zero - the boundary between gain and loss, which puts every other outcome in perspective.