Numbers & Calculators

Mathematical calculators, converters, analyzers, and number manipulation tools for developers, students, and professionals. Perform calculations, conversions, and analysis with our comprehensive collection of free number tools.

Add/Subtract Percentage
Add or subtract percentages from numbers
Age Calculator
Calculate age from birth date
Angle Converter
Convert between angle units
Area Converter
Convert between area units
Armstrong Number Checker
Check if a number is an Armstrong number
Average Calculator
Calculate average of numbers
Binary ↔ Decimal Converter
Convert between binary and decimal
BMI Calculator
Calculate Body Mass Index
Box Plot Generator
Generate box plots from data
Calculator History Tracker
Track and analyze calculator operation history
Combinations Calculator
Calculate combinations
Confidence Interval Calculator
Calculate confidence intervals
Correlation Coefficient
Calculate correlation coefficients
Countdown Timer Generator
Generate countdown timers
Currency Converter
Convert between currencies
Date Difference Calculator
Calculate difference between dates
Days Until Calculator
Calculate days until a date
Decibel Calculator
Calculate and convert between decibel scales
Determinant Finder
Calculate matrix determinants
Dice Roll Simulator
Simulate rolling multiple dice
Distribution Fitter
Fit statistical distributions to data
Decimal Place Rounding Tool
Round numbers to decimal places
Decimal to Fraction Converter
Convert decimals to fractions
Decimal to Time Converter
Convert decimal time to standard time
Digit Sum Calculator
Calculate sum of digits
Digital Root Calculator
Calculate digital root
Distance Converter
Convert between distance units
Divisibility Checker
Check number divisibility
Even or Odd Filter
Filter even or odd numbers
e Digit Viewer
View first N digits of Euler's number
Egyptian Fraction Converter
Convert to Egyptian unit fractions
Factorial Calculator
Calculate factorials
Factors & Multiples Finder
Find factors and multiples
Fibonacci Sequence Generator
Generate Fibonacci sequences
Find Maximum
Find maximum value
Find Minimum
Find minimum value
Fraction to Decimal Converter
Convert fractions to decimals
Frequency Table Generator
Generate frequency tables
GCD & LCM Calculator
Calculate GCD and LCM
Hex ↔ Decimal Converter
Convert between hex and decimal
Harmonic Series Calculator
Calculate harmonic series values
Histogram Generator
Generate histograms
IBAN Number Validator
Validate international bank account numbers
Integer Checker
Check if number is integer
Interest Calculator
Calculate interest
Internal Rate of Return Calculator
Calculate IRR for investments
Inverse Matrix Calculator
Calculate matrix inverses
Leading/Trailing Zeros Remover
Remove leading/trailing zeros
Leap Year Checker
Check if year is leap year
Linear Regression
Perform linear regression
List Primes in Range
List prime numbers in range
Logarithm Calculator
Calculate logarithms
Magic Square Generator
Generate magic squares
Median Finder
Find median value
Mode Calculator
Calculate mode
Monte Carlo Simulation
Run Monte Carlo simulations
Multiplication Table Generator
Generate multiplication tables
Net Present Value Calculator
Calculate NPV for investments
Number Base Converter
Convert between number bases
Number Decryption Tool
Decrypt encrypted numeric data
Number Encryption Tool
Encrypt numeric data
Number Formatter
Format numbers
Number Grid Generator
Generate mathematical grid patterns
Number Guessing Game
Interactive number guessing game
Number Line Visualizer
Visualize numbers on a line
Number Pattern Completer
Complete number patterns
Number Puzzle Generator
Generate mathematical puzzles
Number Range Generator
Generate number ranges
Number Reverser
Reverse numbers
Number Sequence Pattern Detector
Detect number patterns
Number Sorter
Sort numbers
Number Sorting Benchmark
Benchmark sorting algorithm performance
Number to Words
Convert numbers to words
Octal ↔ Decimal Converter
Convert between octal and decimal
Outlier Detector
Detect outliers in data
Parity Checker
Check even/odd parity bits
Percentage Calculator
Calculate percentages
Percentage to Fraction Converter
Convert percentages to fractions
Permutations Calculator
Calculate permutations
Powers & Exponents Tool
Calculate powers and exponents
Prime Number Checker
Check if number is prime
Probability Calculator
Calculate probabilities
Quartile Finder
Find quartiles
Random Decimal Generator
Generate random decimals
Random Number Generator
Generate random numbers
Range Calculator
Calculate range
Ratio Simplifier
Simplify ratios
ROI Calculator
Calculate return on investment
Root Approximator
Approximate nth roots
RPN Calculator
Reverse Polish notation calculator
Remove Duplicate Numbers
Remove duplicate numbers
Remove Non-Numeric Characters
Remove non-numeric characters
Roman Numeral Converter
Convert to/from Roman numerals
Rounding Numbers
Round numbers
Scientific Notation Converter
Convert scientific notation
Signal-to-Noise Ratio Calculator
Calculate SNR in dB and linear scale
Slot Machine RNG Simulator
Simulate slot machine random number generation
Soroban Japanese Abacus Visualizer
Visualize Japanese abacus calculations
Speed Converter
Convert between speed units
Square Root / Cube Root Finder
Find square and cube roots
Standard Deviation
Calculate standard deviation
Sum of Numbers
Calculate sum of numbers
Tax / VAT Calculator
Calculate tax and VAT
Temperature Converter
Convert between temperature units
Triangular Number Finder
Find and explore triangular numbers
Truncate vs Round Tool
Compare truncation and rounding methods
Time Duration Calculator
Calculate time duration
Time to Decimal Converter
Convert time to decimal
Variance Calculator
Calculate variance
Volume Converter
Convert between volume units
Weight Converter
Convert between weight units
Words to Number
Convert words to numbers
Z-Score Calculator
Calculate Z-scores

About Numbers & Calculators

Discover how our comprehensive collection of mathematical calculators and number tools can help with calculations, conversions, analysis, and number manipulation.

What are Number & Calculator Tools?

Number and calculator tools are specialized utilities designed to perform mathematical calculations, convert between number systems and units, analyze numerical data, and manipulate numbers in various ways. These tools cover everything from basic arithmetic to advanced statistical analysis, unit conversions, and number system transformations.

Our collection includes calculators for percentages, averages, statistics, financial calculations, unit conversions (temperature, distance, weight, volume, speed), number base conversions (binary, decimal, hex, octal), date and time calculations, and specialized mathematical operations. Whether you need a quick calculation or complex statistical analysis, these tools provide instant, accurate results.

Who Uses Number & Calculator Tools?

Number and calculator tools are essential for a diverse range of users:

  • Students: Perform homework calculations, convert units, calculate statistics, and solve mathematical problems
  • Developers & Programmers: Convert between number bases (binary, hex, decimal), calculate checksums, and perform bitwise operations
  • Data Analysts & Statisticians: Calculate averages, standard deviation, correlation, regression, and other statistical measures
  • Financial Professionals: Calculate interest, taxes, percentages, ROI, and financial metrics
  • Scientists & Engineers: Convert units, perform scientific calculations, and analyze numerical data
  • Business Professionals: Calculate percentages, averages, growth rates, and business metrics
  • Students & Teachers: Generate multiplication tables, check prime numbers, and visualize number concepts
  • General Users: Calculate age, BMI, dates, currency conversions, and everyday math problems

Key Features & Benefits

Our number and calculator tools offer numerous advantages:

  • Instant Calculations: Get accurate results immediately without manual computation
  • No Installation: All calculators work directly in your browser - no software downloads required
  • Free Forever: No costs, subscriptions, or premium features - everything is completely free
  • Privacy-Focused: All calculations happen locally in your browser - your data never leaves your device
  • Comprehensive Coverage: Tools for basic math, statistics, conversions, financial calculations, and more
  • Multiple Number Systems: Convert between binary, decimal, hexadecimal, octal, and other bases
  • Unit Conversions: Convert between temperature, distance, weight, volume, speed, and area units
  • Visual Tools: Generate graphs, histograms, box plots, and number line visualizations

Common Use Cases

Our number and calculator tools are perfect for:

  • Academic Work: Calculate statistics, convert units, solve math problems, and verify calculations
  • Programming: Convert between number bases, calculate bitwise operations, and work with numeric data
  • Data Analysis: Calculate averages, standard deviation, correlation, regression, and other statistics
  • Financial Planning: Calculate interest, taxes, percentages, ROI, and financial metrics
  • Unit Conversion: Convert between metric and imperial units, temperature scales, and currency
  • Date & Time: Calculate age, date differences, days until events, and time conversions
  • Number Manipulation: Reverse numbers, find factors, check primes, generate sequences, and format numbers
  • Visualization: Create graphs, histograms, box plots, and number line visualizations for presentations

How to Choose the Right Tool

Selecting the right calculator depends on your specific needs:

  • For Basic Math: Use Percentage Calculator, Average Calculator, or Sum of Numbers for arithmetic operations
  • For Statistics: Use Standard Deviation, Variance Calculator, Correlation Coefficient, or Linear Regression for data analysis
  • For Conversions: Use Temperature Converter, Distance Converter, Currency Converter, or Unit Converters based on what you need to convert
  • For Programming: Use Binary/Decimal/Hex Converters, Number Base Converter, or Bitwise operation tools
  • For Financial: Use Interest Calculator, Tax/VAT Calculator, or ROI Calculator for financial calculations
  • For Dates: Use Age Calculator, Date Difference Calculator, or Days Until Calculator for date-related calculations
  • For Number Analysis: Use Prime Number Checker, Factors Finder, Divisibility Checker, or Number Pattern Detector

Many users bookmark multiple calculators for different tasks, creating a personalized toolkit that matches their calculation needs.

Frequently Asked Questions About Numbers & Calculators

Find answers to common questions about our free mathematical calculators and number tools.