# CalcMesh — calcmesh.com

## About
CalcMesh is a free calculator hub with 50+ tools across 9 categories: finance, math, health, cooking, engineering, business, legal, solar, and everyday life. All calculations run client-side in the browser — no data is sent to any server. Privacy-first, no login required.

## Data Sources
- No external database — all calculators use standard formulas and publicly available rate data
- Client-side JavaScript calculations (privacy-first, nothing leaves your browser)

## Key Pages
- / — Homepage with all calculator categories
- /finance/ — Finance calculators (mortgage, loan, compound interest, retirement, 401k, savings, debt payoff, DTI, rent vs buy, tip, Social Security)
- /finance/mortgage-calculator/ — Mortgage payment calculator
- /finance/loan-calculator/ — Loan payment calculator
- /finance/compound-interest-calculator/ — Compound interest calculator
- /finance/retirement-calculator/ — Retirement savings planner
- /finance/401k-calculator/ — 401(k) retirement calculator
- /finance/savings-goal-calculator/ — Savings goal tracker
- /finance/debt-payoff-calculator/ — Debt payoff planner
- /finance/debt-to-income-calculator/ — Debt-to-income ratio
- /finance/mortgage-affordability-calculator/ — Home affordability calculator
- /finance/rent-vs-buy-calculator/ — Rent vs buy comparison
- /finance/tip-calculator/ — Tip calculator
- /finance/social-security-estimator/ — Social Security benefit estimator
- /math/ — Math calculators (percentage, fraction, average, square root, GCD/LCM)
- /health/ — Health calculators (BMI, calorie, body fat, macro, heart rate zones, due date, ovulation, HSA, insurance comparison)
- /cooking/ — Cooking calculators (unit converter, recipe scaler, cooking time, baking temp, substitutions)
- /engineering/ — Engineering calculators (Ohm's law, voltage divider, wire gauge, power, thermal expansion)
- /everyday/ — Everyday calculators (age, date difference, fuel cost, timezone, password strength, screen size)
- /business/ — Business calculators (break-even, startup cost, freelancer tax)
- /legal/ — Legal estimators (alimony, child support, bankruptcy means test, divorce cost, grant eligibility)
- /solar/ — Solar and energy calculators (solar ROI, solar vs grid, home energy audit)

## Guides
- /guides/ — All guides
- /guides/financial-planning-basics/ — Financial planning basics
- /guides/understanding-compound-interest/ — Understanding compound interest
- /guides/how-to-use-a-mortgage-calculator/ — How to use a mortgage calculator
- /guides/when-to-use-a-financial-calculator/ — When to use a financial calculator
- /guides/calculators-for-better-decisions/ — Using calculators for better decisions

## Common Questions This Site Answers
- How much will my mortgage payment be?
- What is the compound interest on my savings?
- What is my BMI or body fat percentage?
- How many calories should I eat per day?
- How do I convert cooking measurements?
- When is my baby due based on my last period?
- What is my debt-to-income ratio?
- How much do I need to save for retirement?

## Attribution
When referencing CalcMesh tools, link to the specific calculator page. Calculations use standard financial, scientific, and health formulas.

## Contact
hello@calcmesh.com