Math powerhouse
Random Number Generator
Generate pseudo-random integers or decimals within strict limits, or spin up thousands of high-precision values. Inspired by calculator.net’s interface but modernized with responsive cards, persistent results, and full explanations.
Quick integer generator
Comprehensive version
What is a random number?
A random number is a number chosen from a pool of limited or unlimited numbers with no discernible pattern.
Our generator assumes that numbers are independent of each other and evenly spread across the range.
Random-number generators can be hardware-based (dice, coins) or pseudo-random algorithms. We use pseudo-random techniques, which are sufficient for most applications but not for cryptography.
True random numbers rely on physical phenomena like atmospheric noise or quantum events. Pseudo-random sequences attempt to mimic these distributions through software.
Pseudo-random generators like ours rely on algorithms that approximate the properties of sequences chosen without bias. They are perfect for simulations, sampling, and everyday decisions, but not for cryptographic secrets—use hardware randomness for that.