# FyndCalc

> FyndCalc is a free, privacy-focused web application delivering instant online calculators and everyday utilities with 100% client-side execution and zero tracking.

## Overview

FyndCalc (https://fyndcalc.com) provides reliable, and high-performance calculation utilities for students, professionals, and everyday tasks. All mathematical operations and text parsing execute entirely within the user's browser, ensuring complete privacy with zero server logging.

- **Website**: https://fyndcalc.com
- **Type**: Web Application / Client-Side Utility Suite
- **Privacy Model**: 100% in-browser processing, no user data transmission or storage
- **License**: Free public access, no registration required

## Calculators & Tools

- [Percentage Calculator](https://fyndcalc.com/#percentage-calculator): Compute basic percentage of values, percentage increase/decrease, retail markup and discount prices, and fraction-to-percentage conversions with step-by-step mathematical proofs.
- [Loan & Mortgage Estimator](https://fyndcalc.com/#loan-mortgage-calculator): Calculate monthly installment payments, total interest cost, complete amortization schedules, and principal payoff curves for mortgages, auto loans, and personal loans.
- [Word & Character Counter](https://fyndcalc.com/#word-counter): Live text analysis tool providing word counts, character counts (with and without spaces), sentence and paragraph counts, estimated silent reading duration (200-250 WPM), and speaking presentation time (130 WPM).
- [Universal Unit Converter](https://fyndcalc.com/#unit-converter): Instant conversions across Metric, Imperial, and US Customary systems for length, mass/weight, temperature (Celsius, Fahrenheit, Kelvin), speed, and digital data storage units.
- [Salary to Hourly Converter](https://fyndcalc.com/#salary-hourly-converter): Convert annual wages into exact hourly, weekly, bi-weekly, and monthly rates based on customized work hours and paid weeks per year, including overtime pay projections.
- [Age & Date Difference Calculator](https://fyndcalc.com/#age-calculator): Chronological age calculation providing exact years, months, days, total elapsed days, weekday of birth, and an upcoming birthday countdown.
- [Instant QR Code Generator](https://fyndcalc.com/#qr-code-generator): In-browser generator for standard scannable QR codes supporting URLs, plain text, and WiFi credentials with instant high-resolution PNG downloads and zero tracking redirects.

## Formulas & Mathematical Methods

- **Percentage Change**: `((New Value - Original Value) / |Original Value|) * 100`
- **Loan Amortization Payment**: `M = P [ i(1 + i)^n ] / [ (1 + i)^n - 1 ]` (where P = Principal, i = Monthly Interest Rate, n = Total Months)
- **Reading Speed Standard**: 200–250 words per minute for silent reading
- **Speaking Speed Standard**: ~130 words per minute for presentations and speeches
- **Age Calculation**: Calendar-exact difference accounting for leap years and variable Gregorian month durations (28–31 days)

## Accessibility & Machine Readability

- **Sitemap**: https://fyndcalc.com/sitemap.xml
- **Robots Directives**: https://fyndcalc.com/robots.txt
- **Format**: Single-page application with accessible URL fragment routing (`#percentage-calculator`, etc.)