# NineNiche - 九號工具站

> A free online tool platform providing calculators, quizzes, and decision trees for finance, work, health, and daily life. Based in Taiwan, with content primarily in Traditional Chinese (zh-TW) and English.

## Site Info
- URL: https://9niche.com
- Language: zh-TW (primary), en
- Type: Web Application / Tool Platform

## Available Tool Categories

### Financial Calculators
- Compound Interest Calculator: https://9niche.com/calc/compound/
- Mortgage Calculator: https://9niche.com/calc/mortgage/
- Car Loan Calculator: https://9niche.com/calc/car-loan/
- Retirement Planner: https://9niche.com/calc/retirement/
- Income Tax Calculator: https://9niche.com/calc/income-tax/
- ROI Calculator: https://9niche.com/calc/roi/
- Debt Payoff Calculator: https://9niche.com/calc/debt-payoff/
- FIRE Calculator: https://9niche.com/calc/fire-calculator/
- Savings Goal: https://9niche.com/calc/savings-goal/
- Emergency Fund: https://9niche.com/calc/emergency-fund/
- Rent vs Buy: https://9niche.com/calc/rent-vs-buy/
- Education Fund: https://9niche.com/calc/education-fund/
- Loan Prepayment: https://9niche.com/calc/loan-prepayment/
- Net Worth Calculator: https://9niche.com/calc/net-worth/
- Deposit Rate Comparison: https://9niche.com/calc/deposit-rate/
- Credit Card Interest: https://9niche.com/calc/credit-card-interest/
- Inflation Calculator: https://9niche.com/calc/inflation/
- Dividend Calculator: https://9niche.com/calc/dividend/
- Stock Cost Calculator: https://9niche.com/calc/stock-cost/
- DCA Calculator: https://9niche.com/calc/dca/
- PE Valuation: https://9niche.com/calc/pe-valuation/

### Work & Career Calculators
- Overtime Pay: https://9niche.com/calc/overtime/
- Annual Leave: https://9niche.com/calc/annual-leave/
- Salary Converter: https://9niche.com/calc/salary/
- Severance Pay: https://9niche.com/calc/severance-pay/
- Labor Insurance: https://9niche.com/calc/labor-insurance/
- Health Insurance: https://9niche.com/calc/health-insurance/
- Take Home Pay: https://9niche.com/calc/take-home-pay/
- Freelance Rate: https://9niche.com/calc/freelance-rate/

### Health Calculators
- BMI Calculator: https://9niche.com/calc/bmi/
- TDEE Calculator: https://9niche.com/calc/tdee/
- Body Fat: https://9niche.com/calc/body-fat/
- Ideal Weight: https://9niche.com/calc/ideal-weight/
- Calorie Burn: https://9niche.com/calc/calorie-burn/
- Water Intake: https://9niche.com/calc/water-intake/
- Sleep Cycle: https://9niche.com/calc/sleep-cycle/
- BAC Calculator: https://9niche.com/calc/bac-calculator/
- Caffeine Calculator: https://9niche.com/calc/caffeine/
- Macro Calculator: https://9niche.com/calc/macro-calculator/
- Due Date Calculator: https://9niche.com/calc/due-date/

### Home & Living Calculators
- Electricity Bill: https://9niche.com/calc/electricity/
- Water Bill: https://9niche.com/calc/water-bill/
- AC Cost: https://9niche.com/calc/ac-cost/
- Rent Budget: https://9niche.com/calc/rent-budget/
- Gas Bill: https://9niche.com/calc/gas-bill/
- Renovation Budget: https://9niche.com/calc/renovation-budget/
- Moving Cost: https://9niche.com/calc/moving-cost/
- Paint Calculator: https://9niche.com/calc/paint-calculator/
- Tile Calculator: https://9niche.com/calc/tile-calculator/
- AC Sizing: https://9niche.com/calc/ac-sizing/

### Vehicle Calculators
- Fuel Cost: https://9niche.com/calc/fuel-cost/
- Vehicle Tax: https://9niche.com/calc/vehicle-tax/
- EV vs Gas Comparison: https://9niche.com/calc/ev-vs-gas/
- Motorcycle Cost: https://9niche.com/calc/motorcycle-cost/
- Car Total Cost: https://9niche.com/calc/car-total-cost/

### Utility Tools
- Age Calculator: https://9niche.com/calc/age/
- Countdown Timer: https://9niche.com/calc/countdown/
- Currency Converter: https://9niche.com/calc/currency/
- Discount Calculator: https://9niche.com/calc/discount/
- Split Bill: https://9niche.com/calc/split-bill/
- Percentage Calculator: https://9niche.com/calc/percentage/
- Unit Converter: https://9niche.com/calc/unit-converter/
- Timezone Converter: https://9niche.com/calc/timezone/
- Date Calculator: https://9niche.com/calc/date-calculator/
- Lucky Wheel: https://9niche.com/calc/wheel/

### Business Calculators
- Break Even: https://9niche.com/calc/break-even/
- Profit Margin: https://9niche.com/calc/profit-margin/
- Tip Calculator: https://9niche.com/calc/tip-calculator/
- Pricing Calculator: https://9niche.com/calc/pricing/

### Academic Tools
- GPA Calculator: https://9niche.com/calc/gpa/
- Weighted Grade: https://9niche.com/calc/weighted-grade/

### Quizzes
- Quiz Center: https://9niche.com/quiz/

### Decision Trees
- Decision Tree Center: https://9niche.com/tree/

### Guides
- Guide Center: https://9niche.com/guide/

## API Endpoints
- Forex Rates: https://9niche.com/api/forex/
- Taiwan Stock Index: https://9niche.com/api/twstock/
- US Market Indices: https://9niche.com/api/usmarket/
- Popular Stocks: https://9niche.com/api/popular-stocks/?market=US
- Gold Price: https://9niche.com/api/gold/
- Metro Status: https://9niche.com/api/metro/
- Crypto Top 10: https://9niche.com/api/crypto/top10/
- Stock Search: https://9niche.com/api/stock-search/?q={query}
- Financial Dashboard: https://9niche.com/api/finance/dashboard/
- Market Trends: https://9niche.com/api/market/trends/

## Content Hubs (Niche Markets)
- Finance: https://9niche.com/niche/finance/
- Work & Career: https://9niche.com/niche/work/
- Quiz Center: https://9niche.com/niche/quiz-center/
- Parenting: https://9niche.com/niche/parenting/
- Home Living: https://9niche.com/niche/home/
- Taiwan Stocks: https://9niche.com/niche/tw-stock/
- Vehicle: https://9niche.com/niche/vehicle/
- US Stocks: https://9niche.com/niche/us-stock/
- Travel: https://9niche.com/niche/travel/
- Entertainment: https://9niche.com/niche/entertainment/
- Tech & Learning: https://9niche.com/niche/tech/
- Pets: https://9niche.com/niche/pets/
- Fitness: https://9niche.com/niche/fitness/
- Books: https://9niche.com/niche/books/

## Key Features
- All tools are free and require no login
- Multilingual: Traditional Chinese (primary), English, Japanese, Korean
- Mobile-optimized Progressive Web App (PWA)
- Real-time financial data integration (forex, stocks, crypto)
- Privacy-focused: no personal data collection for tool calculations
- Structured data (JSON-LD) on all pages for rich search results
- Open for AI citation and indexing (see robots.txt)

## Content Principles
- E-E-A-T compliant (Experience, Expertise, Authoritativeness, Trustworthiness)
- YMYL topics include professional disclaimers
- Regular updates to reflect current regulations (tax, labor law)
- Taiwan-focused with global applicability