Solve nPr and nCr instantly. Handle tricky cases with constraints like "no two adjacent items", "at least one repetition", "restricted choices", and more. Perfect for IIT JEE, CAT, GRE prep.
nPr & nCr
With Constraints
Exam Friendly
Combination (nCr)
Normal (no constraint)
Free Online Permutation & Combination Calculator
Our Permutation and Combination Calculator is a fast and easy tool for solving problems in combinatorics, probability, and statistics. Instantly compute the number of possible arrangements (permutations) or selections (combinations) of items from a set.
Key Features
Dual Calculation: Calculate both permutations ($P(n,k)$) and combinations ($C(n,k)$) from a single set of inputs.
Instant Results: Get accurate results instantly, eliminating the need for manual calculations with large numbers and factorials.
User-Friendly Interface: A clean and simple design makes it easy for students and professionals alike to get the answers they need.
Educational Resource: A perfect tool for understanding fundamental concepts of discrete mathematics and probability.
Why Use Our Calculator?
Save Time & Ensure Accuracy: Solve complex problems in seconds with zero calculation errors.
Academic & Professional Aid: Whether you're doing homework or working on a data science project, this tool is an essential companion.
Completely Free & Accessible: Access the tool anytime, anywhere, on any device without any cost.
Conceptual Clarity: The clear distinction between the two calculations helps solidify your understanding of when to use each one.