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Combinations with Repetition Calculator

Calculate combinations n choose r for counting problems and probability. Enter n and r to get the number of ways to choose without order.

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Last updated: February 17, 2026

Created by: Eon Tools Dev Team

Reviewed by: Ankit Khatiwada



Ankit Khatiwada

Ankit Khatiwada is a researcher and graduate student in Computer Science at Saarland University, with strengths in statistics, data analysis, data engineering, and full stack development. His work sits at the intersection of quantitative reasoning and applied technology, making him a strong fit for tools that depend on clear numerical logic. At Eon Tools, he reviews number and statistical tools.