Calzyra
CalzyraCALCULATE | CONVERT | SOLVE
FinanceInvestmentsHealthMathBlog
Calzyra
CalzyraCALCULATE | CONVERT | SOLVE

Smart calculators for every need. Trusted by millions of users worldwide for accurate, fast, and free calculation tools.

Popular Categories

  • Finance
  • Health & Fitness
  • Mathematics
  • Physics
  • Construction
  • Conversion

Finance Tools

  • Loan Calculators
  • Investment Calculators
  • Compound Interest
  • SIP Calculator
  • ROI Calculator
  • CAGR Calculator

Top Calculators

  • Mortgage Calculator
  • BMI Calculator
  • Percentage Calculator
  • Calorie Calculator
  • Tip Calculator

Company

  • About Us
  • Blog
  • Contact
  • Privacy Policy
  • Terms of Service

© 2026 Calzyra. All rights reserved.

Trusted by 2M+ monthly users
Home/Mathematics/Math Tools/Random Number Generator
Math CalculatorMath Tools

Random Number Generator

Generate random numbers within a specified range. Choose how many numbers to generate and whether duplicates are allowed. Useful for simulations, games, sampling, and statistical analysis.

Updated 2025-01-152 min readCalzyra Math Team

Calculator

Enter your values below

CalculatorFree Tool

The lower bound of the range.

The upper bound of the range.

Number of random values to generate (1-1000).

Whether the same number can appear more than once.

Formula & Methodology

How this calculator works

random() × (max - min) + min

The random number generator produces uniformly distributed random values in the range [min, max]. When duplicates are disallowed, it samples without replacement from the integer range. When duplicates are allowed, each draw is independent.

Frequently Asked Questions

Common questions about this calculator

Math Tools Calculators

Scientific CalculatorGraphing CalculatorRounding CalculatorCeiling CalculatorFloor CalculatorModulo CalculatorGCD CalculatorLCM CalculatorFactorial CalculatorRandom Number GeneratorNumber Sequence GeneratorExpression Evaluator

Related Calculators

Scientific Calculator

Evaluate expressions with sin, cos, tan, log, sqrt, and more.

Graphing Calculator

Plot y=f(x) on an interactive graph with customizable axis ranges.

Modulo Calculator

Find the remainder of a divided by n.

GCD Calculator

Find the greatest common divisor of two numbers.

LCM Calculator

Find the least common multiple of two numbers.

Factorial Calculator

Calculate n! (n factorial) for any non-negative integer.

Expression Evaluator

Instantly evaluate any valid mathematical expression.

Quick Links

All Math CalculatorsMath Tools Category