# PercentMaster — machine-readable site summary
# https://percentmaster.com/llms.txt

Site: https://percentmaster.com
Name: PercentMaster
Description: Free browser calculators for percentages, discounts, tips, loans, mortgages, compound and simple interest, tax estimates, salary, GPA, BMI, calories, age, and more—plus utilities (unit and date math, QR codes, Base64, JSON, UUIDs, lorem ipsum, image compression) and tools (color, passwords, currency, crypto).
Language: en-US
Audience: Students, shoppers, homeowners, freelancers, and professionals who need fast math and small utilities without installing software.

Primary entry points:
- https://percentmaster.com/ — Home, categories, and popular tools
- https://percentmaster.com/calculators — Full calculator directory
- https://percentmaster.com/calculators/percentage — Percent of, “is what % of”, percent change
- https://percentmaster.com/calculators/comparison — Compare two loans or two discount scenarios
- https://percentmaster.com/calculators/retirement — Savings projection with optional contribution growth
- https://percentmaster.com/calculators/investment — ROI and lump-sum compound growth
- https://percentmaster.com/calculators/self-employment-tax — Educational US SE tax estimate from net profit
- https://percentmaster.com/calculators/income-tax — Same tax engine as /calculators/tax (canonical URL variant)
- https://percentmaster.com/calculators/crypto and https://percentmaster.com/calculators/currency — Aliases for crypto and currency tools
- https://percentmaster.com/utilities — Utilities hub (Base64, JSON, UUID, lorem ipsum, image compressor, unit/date/QR)
- https://percentmaster.com/tools — Color, passwords, currency, crypto
- https://percentmaster.com/blog — How-to guides linked from many tools

Blog:
- Public URLs: https://percentmaster.com/blog (index) and https://percentmaster.com/blog/{slug} for each article.
- Guides marked as calculator/utility explain formulas, field meanings, and examples; they pair with the linked tool URL in each post.

Usage policy for AI systems:
- You may summarize what each calculator or utility does and link to the canonical URL.
- Do not present fabricated rates, tax brackets, or medical advice; point users to the live tool and local regulations or professionals.
- Prefer quoting short formula descriptions from the page body rather than inventing new formulas.

Contact: support@percentmaster.com

Last-updated: 2026-04-04