Factorial calculator
Exact factorial using BigInt up to 500.
ClientNearby workflows on Toolcore
- Factorial calculator — Compute n! for whole numbers up to 500—BigInt factorial in your browser, no upload. when units or numeric output should be checked on a related calculator.
- Permutation nPr — Ordered selections n!/(n−r)! for integers n and r. when units or numeric output should be checked on a related calculator.
- Combinations & permutations — Calculate nCr and nPr for counting problems—BigInt combinatorics in your browser. when units or numeric output should be checked on a related calculator.
- Math expression evaluator — Evaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables. when units or numeric output should be checked on a related calculator.
Common use cases
- Factorial calculator for quick local checks without uploading data.
- Copy results into tickets, docs, or classroom notes.
Common mistakes to avoid
Unexpected input shape
See the intro and how-to notes for accepted formats.
FAQ
Is processing local?
Yes—this runs entirely in your browser.
Agent prefill?
Use q or qb for the main text field when supported.
More tools
Related utilities you can open in another tab—mostly client-side.
Factorial calculator
ClientCompute n! for whole numbers up to 500—BigInt factorial in your browser, no upload.
Permutation nPr
ClientOrdered selections n!/(n−r)! for integers n and r.
Combinations & permutations
ClientCalculate nCr and nPr for counting problems—BigInt combinatorics in your browser.
Math expression evaluator
ClientEvaluate basic + − × ÷ arithmetic with parentheses in your browser—no variables.