⚡
General Calculators
Ohm's Law Calculator
Calculate voltage, current, resistance, and power using Ohm's law when you know two…
Percentage Calculator
Easily calculate percentages – addition, subtraction, change, and much more.
✅ Free
📅 Updated 22.9.2026
🌐 Free tool
About this calculator
What is the Percentage Calculator – calculating percentages?
The percentage calculator calculates the percentage of a number, determines the part value of a whole, or calculates the percentage between two numbers. It covers all three basic percentage calculations.
The calculator is free, works in the browser, and does not require registration. This site offers over 200 calculators with up-to-date data.
Calculation Principle
P % of number X = X × P/100. Percentage of part: (part ÷ whole) × 100. Whole: part ÷ (P/100).
Fill in your information in the fields and press the calculate button – the result will appear immediately.
Practical Example
What is 15 % of 240? → 240 × 0.15 = 36. What % is 45 of 180? → 45÷180×100 = 25 %. What is the whole when 30 % = 90? → 90÷0.30 = 300.
Enter your own information into the calculator to get a personalized result.
Who is the calculator suitable for?
The calculator is suitable for individuals, entrepreneurs, and professionals. All calculators on this site are free of charge.
The result is an estimate or calculated value – for official matters, verify the numbers with official sources or an expert.
Tips
- Remember the order of percentage calculations: first calculate the percentage, then the result.
- Round the result only after the calculation, not in intermediate calculations.
- Calculating percentages is part of everyday life – check calculators, discounts, and interest rates with this.
Frequently Asked Questions
Percentage means part of a hundred. Calculation: value × percentage ÷ 100. Example: 15 % of 200 $ = 200 × 15 ÷ 100 = 30 $.
Formula: (new – old) ÷ old × 100. Example: the price increased from 80 $ to 100 $ → (100–80) ÷ 80 × 100 = 25 % increase.
Formula: part ÷ percentage × 100. Example: 30 is 15 % of what number? → 30 ÷ 15 × 100 = 200.
Formula: part ÷ whole × 100. Example: 30 is how many % of the number 200? → 30 ÷ 200 × 100 = 15 %.
VAT or discount is typically a fixed percentage of the price. Use our VAT calculator or discount calculator for a quicker result.
A percentage point is the absolute difference between two percentages (e.g. 5 % → 8 % = 3 percentage points). The percentage change is relative (5 % increases by 60 % → 8 %).