About the percentage calculator
The calculator keeps the formulas visible through the result explanation, which makes it useful for shopping, finance, invoices and quick classroom checks.
Questions
Is anything uploaded?
No for this tool. The calculation or conversion runs in your browser.
Does it work on mobile?
Yes. The same workspace adapts to smaller screens and keeps the primary controls visible.
Is it free?
Yes. Simple Tools is designed as a free, fast utility suite.