Percentage Calculator

of % is how much
0
From to what is the percentage change?
0%
is what percent of
0%

Professional Online Percentage Calculator: Simplify Complex Data Tasks

Percentage conversions can be confusing in daily financial accounting or business analysis. Our tool simplifies complex formulas into three intuitive modes, helping you process various proportion problems efficiently and accurately.

Three Core Logics (What can it solve?)

  • Find the Value: Quickly calculate 'What is X% of a number.' Ideal for calculating tax rates, service fees, or specific commission amounts.
  • Percentage Change: Automatically determine the 'Percentage increase or decrease from A to B.' Instantly analyze sales growth, price fluctuations, or period-over-period data trends.
  • Proportion Analysis: Precisely find 'What percentage is A of B.' Use it to analyze market share, cost distribution, or project completion progress.

Real-World Examples

🛍️ Shopping: Rapidly calculate savings from discounts or additional sales tax on items.

📈 Workplace Reports: Calculate month-over-month growth rates for business KPIs to make your reports more persuasive.

🎓 Education & Stats: Analyze exam score percentages or data distribution in academic research.

Technical Assurance & Data Security

  • Minimalist Instant Feedback: Powered by a lightweight frontend algorithm, results are updated instantly as you type—no extra clicks required.
  • Private Local Computing: Percentage calculations often involve sensitive data like salaries or profits. SmallToolbox guarantees all calculations are performed locally in your browser. Your data never touches our servers, ensuring total privacy.