Calculate the factorial of any number (n!). Handles large numbers and shows the full multiplication sequence. Everything runs locally in your browser — nothing is uploaded.
Check if any number is prime. Also shows all factors and whether the number is odd or even. Everything runs locally in your browser — nothing is uploaded.
Convert numbers between standard form and scientific notation (E-notation). Handles very large and very small numbers. Everything runs locally in your browser — nothing is uploaded.
Calculate the number of ways to arrange k items from n items (nPr). Shows the step-by-step permutation calculation. Everything runs locally in your browser — nothing is uploaded.
Convert any number to its English word representation. Supports large numbers up to billions. Everything runs locally in your browser — nothing is uploaded.
Validates Aadhaar numbers using Verhoeff checksum verification. Checks format rules, detects fake UIDs, and explains Aadhaar number structure. Fully local validation with no data upload.
Factorial Calculator lets you calculate the factorial of any number (n!). Handles large numbers and shows the full multiplication sequence. Everything runs locally in your browser — nothing is uploaded.. It works on any device with a modern web browser.
Calculate the factorial of any number (n!). Handles large numbers and shows the full multiplication sequence. Everything runs locally in your browser — nothing is uploaded. It runs entirely in your browser — no software installation or data uploads required.
Enter numeric values in the input fields — amounts, rates, or percentages.
Yes. After the initial page load, Factorial Calculator runs entirely on your device with no internet connection needed. All processing is done locally.
n! = n × (n-1) × (n-2) × ... × 2 × 1. For example, 5! = 5 × 4 × 3 × 2 × 1 = 120. By definition, 0! = 1.
JavaScript handles numbers up to 2^53. Factorials grow very fast — 18! is the largest exact integer factorial. Beyond that, the tool shows approximate scientific notation.
Yes. The tool displays the full expansion (e.g., 6! = 6 × 5 × 4 × 3 × 2 × 1 = 720) so you can follow the calculation.
Permutations, combinations, probability calculations, Taylor series, binomial distribution, and various mathematical formulas in statistics and algebra.
Yes. All calculations run in your browser. No data is transmitted.
Permutation Calculator
Calculate the number of ways to arrange k items from n items (nPr). Shows the step-by-step permutation calculation. Everything runs locally in your browser — nothing is uploaded.
Combination Calculator
Calculate the number of ways to choose k items from n items (nCr). Includes the formula and step-by-step result. Everything runs locally in your browser — nothing is uploaded.