CalcuFly Formulas

A comprehensive JavaScript library for mathematical, financial, and scientific calculations. Perfect for developers who need reliable calculation formulas without the complexity.

For interactive online calculators, visit CalcuFly.com - the most complete calculator suite available.

Installation

npm install calcufly-formulas

Quick Start

const calcufly = require('calcufly-formulas');

// Calculate mortgage payment
const payment = calcufly.calculateMortgage(300000, 4.5, 30);
console.log(`Monthly payment: $${payment}`);

// Calculate BMI
const bmi = calcufly.calculateBMI(75, 180);
console.log(`BMI: ${bmi}`);

// Convert units
const feet = calcufly.lengthConversions.metersToFeet(10);
console.log(`10 meters = ${feet} feet`);

Features

💰 Mortgage & Loan Calculators

Calculate mortgage payments, total interest, and amortization schedules.

Online Tools:

• Mortgage Calculator - Complete mortgage analysis
• Loan Calculator - Any type of loan
• Auto Loan Calculator - Car financing
• Student Loan Calculator - Education loans

// Calculate monthly mortgage payment
const payment = calcufly.calculateMortgage(300000, 4.5, 30);
// Calculate total interest paid
const interest = calcufly.calculateTotalInterest(300000, 4.5, 30);

🏥 Health & Fitness Calculators

BMI, BMR, calorie needs, and more health metrics.

Online Tools:

• BMI Calculator - Body Mass Index
• BMR Calculator - Basal Metabolic Rate
• Calorie Calculator - Daily calorie needs
• Body Fat Calculator - Body composition
• Ideal Weight Calculator - Target weight

// Calculate BMI
const bmi = calcufly.calculateBMI(75, 180); // weight in kg, height in cm

// Calculate BMR
const bmr = calcufly.calculateBMR(75, 180, 30, 'male');

💵 Financial Calculators

Investment returns, compound interest, retirement planning, and more.

Online Tools:

• Compound Interest Calculator - Investment growth
• Investment Calculator - Portfolio analysis
• Retirement Calculator - Retirement planning
• Savings Calculator - Savings goals
• ROI Calculator - Return on investment

// Calculate compound interest
const investment = calcufly.calculateCompoundInterest(10000, 7, 10, 12);
console.log(`Final amount: $${investment.finalAmount}`);

// Calculate simple interest
const simple = calcufly.calculateSimpleInterest(5000, 5, 3);

🔄 Unit Converters

Convert between different units of measurement.

Online Tools:

• Unit Converter - All-in-one converter
• Length Converter - Distance & length
• Weight Converter - Mass & weight
• Temperature Converter - Temperature scales
• Currency Converter - Exchange rates
• Area Converter - Surface area
• Volume Converter - Volume & capacity

// Length conversions
const feet = calcufly.lengthConversions.metersToFeet(10);
const km = calcufly.lengthConversions.milesToKilometers(100);

// Weight conversions
const kg = calcufly.weightConversions.poundsToKilograms(150);

// Temperature conversions
const fahrenheit = calcufly.temperatureConversions.celsiusToFahrenheit(25);

📐 Geometry & Math Calculators

Calculate areas, volumes, and geometric properties.

Online Tools:

• Area Calculator - Area of shapes
• Volume Calculator - Volume of 3D shapes
• Geometry Calculator - Complete geometry
• Triangle Calculator - Triangle properties
• Circle Calculator - Circle calculations

// Calculate areas
const rectArea = calcufly.areaCalculations.rectangle(10, 5);
const circleArea = calcufly.areaCalculations.circle(7);

// Calculate volumes
const sphereVol = calcufly.volumeCalculations.sphere(5);
const cylinderVol = calcufly.volumeCalculations.cylinder(3, 10);

📊 Percentage Calculators

Percentage calculations, changes, increases, and decreases.

Online Tools:

• Percentage Calculator - Basic percentages
• Percentage Change Calculator - Calculate changes
• Percentage Increase Calculator - Growth
• Percentage Decrease Calculator - Reduction
• Percentage Difference Calculator - Compare values

// Calculate percentage of a number
const result = calcufly.percentageOf(20, 500); // 20% of 500 = 100

// Calculate percentage change
const change = calcufly.percentageChange(100, 150); // 50% increase

// What percentage is X of Y
const percent = calcufly.whatPercentage(25, 200); // 12.5%

📈 Statistics Calculators

Mean, median, standard deviation, and statistical analysis.

Online Tools:

• Statistics Calculator - Complete stats
• Average Calculator - Mean calculation
• Median Calculator - Median & mode
• Standard Deviation Calculator - Variance

const numbers = [10, 20, 30, 40, 50];

const mean = calcufly.calculateMean(numbers);
const median = calcufly.calculateMedian(numbers);
const stdDev = calcufly.calculateStandardDeviation(numbers);

📅 Date & Time Calculators

Age calculation, date differences, and time calculations.

Online Tools:

• Date Calculator - Date operations
• Age Calculator - Calculate age
• Days Calculator - Days between dates
• Time Calculator - Time operations
• Business Days Calculator - Working days

// Calculate age
const age = calcufly.calculateAge('1990-05-15');

// Days between dates
const days = calcufly.daysBetween('2024-01-01', '2024-12-31');

Why CalcuFly?

• Accurate: All formulas are mathematically verified
• Fast: Optimized for performance
• Simple: Clean, intuitive API
• Complete: Covers most common calculation needs
• Well-tested: Thoroughly tested formulas
• Zero dependencies: No external dependencies

More Calculators

This library provides the formulas, but for a complete calculator experience with visual interfaces, input validation, and detailed results, visit CalcuFly.com:

Popular Calculators:

• Mortgage Calculator
• BMI Calculator
• Percentage Calculator
• Loan Calculator
• Investment Calculator
• Calorie Calculator
• Compound Interest Calculator
• Unit Converter

Additional Tools:

• Tax Calculator
• Tip Calculator
• GPA Calculator
• Grade Calculator
• Salary Calculator
• Discount Calculator

License

MIT License - feel free to use in your projects!

Links

• Website: CalcuFly.com
• GitHub: github.com/mansouewalks-bit2/calcufly-formulas
• NPM: npmjs.com/package/calcufly-formulas

Made with ❤️ by the CalcuFly team. Visit CalcuFly.com for more calculators!