All Calculators & Tools - 361+ Functions in 41+ Professional Tools
Calculators, converters, and tools for math, finance, health, engineering, and more
Popular Tools
Calorie Calculator
Calculate daily calorie needs and weight goals
Loan Payment Calculator
Calculate loan payments, interest, and payoff schedules
Average Calculator
Calculate mean, median, mode, and range of numbers
Weight Converter
Convert between 14+ weight and mass units
Area Calculator
Calculate area for 18+ geometric shapes
Paycheck Calculator
Calculate take-home pay, taxes, and deductions
Power Tools
Scientific Calculator
Advanced mathematical calculations with trigonometry, logarithms, and more
Compound Interest Calculator
Calculate compound interest with various compounding frequencies
Mortgage Calculator
Calculate monthly payments, total interest, and amortization
Currency Converter
Convert between 50+ world currencies with live rates
Area Calculator
Calculate area for 18+ geometric shapes
Length Converter
Convert between 16+ length units
Weight Converter
Convert between 14+ weight and mass units
Energy Converter
Convert between 10+ energy units
Recently Updated
Calorie Calculator
Calculate daily calorie needs and weight goals
Loan Payment Calculator
Calculate loan payments, interest, and payoff schedules
Average Calculator
Calculate mean, median, mode, and range of numbers
Weight Converter
Convert between 14+ weight and mass units
Area Calculator
Calculate area for 18+ geometric shapes
Paycheck Calculator
Calculate take-home pay, taxes, and deductions
Text Counter
Count characters, words, lines, and paragraphs
Fraction Calculator
Add, subtract, multiply, and divide fractions
Simple Interest Calculator
Calculate simple interest for loans and investments
Temperature Converter
Convert between Celsius, Fahrenheit, and Kelvin
Square Root Calculator
Calculate square roots, cube roots, and nth roots
Password Generator
Generate secure passwords with custom options
Date Calculator
Calculate date differences and add/subtract days
GPA Calculator
Calculate GPA with different grading scales
Discount Calculator
Calculate discounts, sale prices, and savings
Color Converter
Convert between RGB, HEX, HSL, and other color formats
Age Calculator
Calculate exact age in years, months, and days
Color Picker
Professional color picker with palette generation
QR Code Generator
Generate QR codes for text, URLs, and more
Sales Tax Calculator
Calculate sales tax, total price, and tax rates
Tip Calculator
Calculate tips and split bills for groups
Case Converter
Convert text to UPPERCASE, lowercase, Title Case
Time Converter
Convert between time zones and time formats
Notepad
Simple, fast, and secure online text editor
Image Converter
Convert images between different formats
Voltage Converter
Convert between voltage units and calculate power
Number Base Converter
Convert between binary, decimal, hexadecimal, and octal
URL Shortener
Create short URLs and track clicks
Power Converter
Convert between power units (watts, horsepower, etc.)
Hash Generator
Generate MD5, SHA1, SHA256 hashes
Energy Converter
Convert between 10+ energy units
ASCII Table
Complete ASCII character reference table
Frequency Converter
Convert between frequency units (Hz, MHz, GHz)
Fractional Inches Converter
Convert between decimal and fractional inches
Scientific Calculator
Advanced mathematical calculations with trigonometry, logarithms, and more
Currency Converter
Convert between 50+ world currencies with live rates
Percentage Calculator
Calculate percentages, percentage change, and percentage of numbers
Compound Interest Calculator
Calculate compound interest with various compounding frequencies
BMI Calculator
Calculate Body Mass Index and health categories
Mortgage Calculator
Calculate monthly payments, total interest, and amortization
Length Converter
Convert between 16+ length units
Why Choose Multi-Function Calculators?
Unlike simple calculator sites with hundreds of basic tools, our 41 professional calculators each contain multiple functions. Our Scientific Calculator alone has 25+ mathematical functions, while our Currency Converter supports 50+ currencies. This means fewer bookmarks, faster calculations, and more powerful results.