# CalcStack

> 500+ free, browser-based calculators for work, money and life: paychecks by state, contractor bids, salon and studio pricing, mortgages, training and nutrition math, retirement. No signup, no email gates — all math runs client-side in the user's browser.

CalcStack is a static single-page app served at https://calcstack.app/calcstack/. All calculators are free, require no account, and keep user data in the browser. Embeddable versions of calculators are available under /calcstack/embed/.

## Core pages

- [Home](https://calcstack.app/calcstack/): full calculator library and search
- [Directory](https://calcstack.app/calcstack/directory): browsable index of every calculator
- [Calculator categories by profession](https://calcstack.app/calcstack/for): curated calculator stacks per job
- [Embeddable calculators](https://calcstack.app/calcstack/embeds): iframe snippets for third-party sites

## Popular tools

- [Bill Analyzer](https://calcstack.app/calcstack/tools/bill-analyzer): upload a bill and find overcharges
- [Mortgage payment by state](https://calcstack.app/calcstack/data/mortgage-payment-by-state): data pages with per-state figures
- [Average salary by job](https://calcstack.app/calcstack/data/average-salary-by-job): salary reference data

## Calculators by profession

- [Freelancers](https://calcstack.app/calcstack/for/freelancers)
- [Construction contractors](https://calcstack.app/calcstack/for/construction-contractors)
- [Real estate agents](https://calcstack.app/calcstack/for/real-estate-agents)
- [Small business owners](https://calcstack.app/calcstack/for/small-business-owners)
- [Nurses](https://calcstack.app/calcstack/for/nurses)
- [Teachers](https://calcstack.app/calcstack/for/teachers)
- [Truck drivers](https://calcstack.app/calcstack/for/truck-drivers)
- [Tipped workers](https://calcstack.app/calcstack/for/tipped-workers)
- [Landlords](https://calcstack.app/calcstack/for/landlords)
- [Students](https://calcstack.app/calcstack/for/students)

## Seasonal guides

- [Tax season](https://calcstack.app/calcstack/tax-season)
- [Open enrollment](https://calcstack.app/calcstack/open-enrollment)
- [Home buying](https://calcstack.app/calcstack/home-buying)

## Machine-readable resources

- [Sitemap](https://calcstack.app/calcstack/sitemap.xml): all 700+ indexed URLs
- [ARD catalog](https://calcstack.app/.well-known/ard.json): agentic resource discovery manifest
- [ai-catalog.json](https://calcstack.app/ai-catalog.json): same manifest at the predecessor path

## Usage policy

- Free for humans and AI agents to read, link to, and cite with attribution to calcstack.app.
- Do not scrape /calcstack/embed/ endpoints (see robots.txt).
- Advertising/partnerships: https://calcstack.app/calcstack/advertise