# Calculz

> Calculators that show their work.

Calculz builds practical calculators for sellers, freelancers, and small businesses. Each tool shows inputs, assumptions, and results together so you can verify the numbers and adjust them for your situation. All core calculations run in the browser without an account.

## Primary Pages

- [Home](https://calculz.com/): Calculz overview, featured tools, and the calculator approach
- [About](https://calculz.com/about): Why Calculz focuses on transparent, verifiable calculations
- [Tools](https://calculz.com/tools): Directory of current and planned business calculators
- [Notes](https://calculz.com/blog): Articles on marketplace selling, fees, and business decisions

## Current Tools

- [Marketplace Fee Calculator](https://calculz.com/tools/marketplace-fee-calculator): Estimate fees, payout, profit, and margin for eBay and Whatnot listings. Includes preset fee structures, custom rates, and a breakdown of each cost component.

## Planned Tool Areas

- Freelance rate calculator — turn target income into an hourly rate that accounts for real working time
- CPM calculator — compare campaign cost, impressions, and the price of reach

## Data and Privacy

Calculz's core calculations are performed locally in the browser. No data leaves the device unless a user chooses to submit a contact or feedback form. See the [Privacy Policy](https://calculz.com/privacy) for details.

## Optional Pages

- [Privacy](https://calculz.com/privacy): Data handling and privacy practices
- [Terms](https://calculz.com/terms): Usage terms and conditions
- [Cookies](https://calculz.com/cookies): Cookie usage policy
- [Contact](https://calculz.com/contact): Contact form and email
- [Sitemap](https://calculz.com/sitemap.xml): XML sitemap for crawlers