Percent Calculator & Exam Percentage Calculator

Calculate X% of a number, find what percent one number is of another, compute increase/decrease, or get your exam percentage & grade — fast and accurate.

Tip: Press Enter to calculate.

How to Use the Percent Calculator

  1. Select the calculation type from the dropdown.
  2. Enter the required values (e.g., value & percentage, or marks obtained & total marks).
  3. Click Calculate to see the result instantly with a step-by-step explanation.
  • Find X% of Y: What is 15% of 200?
  • What Percent: 50 is what percent of 200?
  • Increase/Decrease: From 120 to 150 is what % change?
  • Exam %: 420 out of 500 equals what percent and grade?

Percent Calculator FAQs

How do I calculate percentage easily?

Use the formula: (Part ÷ Total) × 100. Example: 50 of 200 = (50 ÷ 200) × 100 = 25%.

What is 20% of 200?

Use: (200 × 20) ÷ 100 = 40. So, 20% of 200 is 40.

How is exam percentage calculated?

Exam % = (Marks Obtained ÷ Total Marks) × 100. Example: 420 ÷ 500 × 100 = 84%.

How are grades decided?

Grading scales vary. This tool uses a common scale by default (A+ ≥90, A 80-89, B 70-79, C 60-69, D 50-59, F <50). Schools may differ.

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