Combination & Permutation Calculator

Free combination and permutation calculator. Enter n and r to calculate nCr (combinations) and nPr (permutations) with step-by-step formulas. Use our free calcu

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Combination C(n,r) hesaplanacak
Permutation P(n,r) hesaplanacak
Formula (Combination) hesaplanacak
Formula (Permutation) hesaplanacak

Combinations vs Permutations

Both count ways to choose items from a set, but with one key difference: permutations care about order (ABC is different from BAC); combinations do not (ABC and BAC are the same group).

Formulas

Permutations (nPr)

nPr = n! / (n - r)!

How many ways can you arrange r items chosen from n?

Example: 5 people, choose 3 for 1st/2nd/3rd place: 5P3 = 60

Combinations (nCr)

nCr = n! / (r! x (n - r)!)

How many ways can you choose r items from n, ignoring order?

Example: 5 people, choose a team of 3: 5C3 = 10

Practical Examples

  • Lottery: Picking 6 numbers from 49 = 49C6 = 13,983,816 combinations
  • Committee: Selecting 4 members from 10 = 10C4 = 210 ways
  • Passwords: 4-digit PIN from 0–9 = 10P4 = 5,040 (if no repeats)
  • Seating: Arranging 5 people at a table = 5! = 120 arrangements

What Is n! (Factorial)?

n! = n x (n-1) x (n-2) x ... x 1

Example: 5! = 5 x 4 x 3 x 2 x 1 = 120. By definition, 0! = 1.

How to Use This Calculator

Using our calculator is simple: enter the required values into the input fields and click the calculate button. Results are displayed instantly on screen. You can adjust the values and recalculate to compare different scenarios and find the best option for your situation.

Frequently Asked Questions

QuestionAnswer
How accurate are the results?We use standard formulas and up-to-date 2025 rates. Individual circumstances may vary slightly.
Is this calculator free?Yes, completely free and no registration required.
What should I do for exact figures?For precise information, consult a relevant professional or official authority.
Does it work on mobile devices?Yes, it works seamlessly on all devices and screen sizes.

Important Notes

This calculator is provided for informational purposes only. For legal, financial, or medical decisions, always seek advice from qualified professionals. Calculation results do not constitute official documents. Legislative changes may affect results; please visit the relevant official website for the most up-to-date information. Our calculators are regularly updated to reflect current regulations and rates.

Related Calculators

Check out our other related calculators on the homepage for similar financial and practical calculations. Using multiple tools together helps you make better-informed decisions. Browse our category pages to discover all available calculators organized by topic.

How to Use This Calculator

Using our calculator is simple: enter the required values into the input fields and click the calculate button. Results are displayed instantly on screen. You can adjust the values and recalculate to compare different scenarios and find the best option for your situation.

Frequently Asked Questions

QuestionAnswer
How accurate are the results?We use standard formulas and up-to-date 2025 rates. Individual circumstances may vary slightly.
Is this calculator free?Yes, completely free and no registration required.
What should I do for exact figures?For precise information, consult a relevant professional or official authority.
Does it work on mobile devices?Yes, it works seamlessly on all devices and screen sizes.

Important Notes

This calculator is provided for informational purposes only. For legal, financial, or medical decisions, always seek advice from qualified professionals. Calculation results do not constitute official documents. Legislative changes may affect results; please visit the relevant official website for the most up-to-date information. Our calculators are regularly updated to reflect current regulations and rates.

Related Calculators

Check out our other related calculators on the homepage for similar financial and practical calculations. Using multiple tools together helps you make better-informed decisions. Browse our category pages to discover all available calculators organized by topic.

Related Calculators

Frequently Asked Questions

Permutations count ordered arrangements (ABC is different from BAC). Combinations count unordered selections (ABC and BAC are the same). Use P for rankings, C for selections.
Use combinations when order does not matter — choosing a lottery ticket, selecting a committee, or picking items from a menu.
n! means n × (n-1) × (n-2) × ... × 2 × 1. For example, 5! = 5×4×3×2×1 = 120. By definition, 0! = 1.