How Kalyvor keeps your files private
Encryption in transit, immediate deletion and what browser-side processing actually means.
4 min read
Finance calculatorsFreeFast
ROI Calculator
Turn a cost and a final value into a gain or loss and a return-on-investment percentage. Instant, in your browser.
- instantaverage
- In-browserprocessing
- Zerouploads
- Runs in your browser
- Nothing is uploaded
- No signup required
Kalyvor
ROI Calculator
Finance calculators
ROI Calculator
Inputs
Initial investment
Final value
Your result appears here.
Ready to generate
Choose your options and press Calculate.
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FreeSee how a balance grows over time at a given rate and compounding frequency, with optional regular contributions and principal vs. interest broken out separately.
Why Kalyvor
Built for people who value their time
Every finance tool is fast, private and genuinely free — no dark patterns, no surprises.
Fast cloud processing
Jobs run on dedicated workers and finish in seconds — no queue, no spinner you can go make coffee to.
Auto file deletion
Everything you upload is erased the moment the job finishes. Nothing is written to long-term storage, so there is no retention period to wait out.
Works everywhere
Desktop, tablet or phone, any modern browser. Nothing to install, no plugins, no extensions.
Batch processing
Drop in a folder's worth of files and run the whole set through one tool in a single pass.
Privacy first
Encrypted in transit, never used to train models, never sold. Many tools never send the file at all.
No installation
Open a tab and go. No account needed to start, no download, no licence key to hunt for.
How it works
ROI Calculator in three steps
No account, no installation, no manual. It takes about as long to do as it does to read.
- 01
Enter what you put in
The initial investment or cost.
- 02
Enter what it's worth now
The final value or proceeds — what you got back, or what it's currently worth.
- 03
Read your gain or loss and ROI
The dollar gain or loss, and the return on investment as a percentage — updated instantly.
Questions
Frequently asked questions
Everything worth knowing before you run your first ROI Calculator job. Still stuck? Talk to support.
Helpful articles
Guides and walkthroughs for getting more out of ROI Calculator.
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Getting started with Kalyvor
From first upload to finished download in under a minute — the whole flow.
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