Combination & Permutation Calculator

Combination & Permutation Calculator helps you calculate combinations and permutations for counting problems. Use this free browser-based calculator from XTRAW Tools to compare inputs, estimate results, and plan your next step.

How to Use the Combination & Permutation Calculator

1. Enter the required calculator inputs shown in the form.
2. Review the numbers, expression, equation, data set, ratio, date, or measurement assumptions.
3. Run the calculator, then adjust one input at a time to compare scenarios or check your work.

What This Calculator Helps With

Calculate combinations and permutations for counting problems. It is designed for students, teachers, probability learners, statisticians, and test-prep users who want a fast, browser-based result before relying on an instructor, textbook, advisor, professional source, healthcare provider, or specialist.

• n: 10
• r: 3

Common Uses

People use this calculator when they need a quick way to solve math, summarize data, check formulas, compare values, estimate timing, or verify measurement-based results.

• Math Solving: Solve school, study, work, or everyday math problems using clear numeric inputs.
• Project Planning: Analyze data, count outcomes, compare options, or plan a math-based scenario.
• Measurement: Use measurements, values, ratios, data sets, or equations to calculate a specific result.

Formula or Method

nCr = n! / [r!(n-r)!]; nPr = n! / (n-r)!

Example

Example inputs: n: 10; r: 3

Example result: Using the default inputs, 10C3 = 120 and 10P3 = 720.

Related Tools

• Combination Calculator
• Permutation Calculator
• Probability Calculator
• Factorial Calculator
• Basic Probability Calculator
• Dice Probability Calculator

Combination & Permutation Calculator FAQ

Is the Combination & Permutation Calculator free?

Yes. This calculator is free to use on XTRAW Tools.

Do I need to create an account?

No. XTRAW tools are designed for browser-based use without requiring an account.

Are the results exact?

Results may be estimates depending on the inputs, formula, rounding, and purpose of the calculator. Always verify important results before relying on them.

Disclaimer: This calculator is provided for general informational and convenience purposes only. It is not legal, financial, medical, pregnancy, fertility, engineering, academic, safety, or professional advice. Always verify important results with a qualified professional, instructor, authoritative source, or appropriate specialist before making decisions.