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Advanced Percentage Calculator

Currency auto-detected by region (e.g., $). No data leaves your browser.
What is% of?
Result:7.5
is what percent of?
Result:20%
What is the percentageincreasefromto?
Result:25%
What number is% ifis the result?
Original number:40
Fraction/as a percentage:
Result:75%
Convert% to a fraction:
Result:3 / 4
% of%
Apply to base
Combined:6%
Applied value:7.2
Discount% on price:
You save$20.00Final$80.00
Tip% on billsplit between
Tip:$9.00
Total:$59.00
Per person:$59.00
vs
Result:22.22%
Increaseby%
Decreaseby%
Increased value:225
Decreased value:175
TL;DR — calculate percentages instantly

Find percentages, increases/decreases, differences, discounts, and more. Results update as you type, with currency symbols auto-detected. Everything is private and client-side.

Advanced Percentage Calculator — your all-in-one percent math tool

Percentages come up in everyday life: discounts, exam scores, tax changes, or financial growth. This Advanced Percentage Calculator gives you instant answers to all common percent problems. Type numbers into the boxes and the result appears right away — no submit button, no delay.

You can quickly calculate X% of Y, determine what percent one number is of another, or compute percentage increase/decrease between two values. The tool also supports reverse calculations (finding the original value), percentage difference (symmetric method), and fraction to percent conversions. For financial use, there are built-in discount and tip split rows, which show totals formatted with your local currency symbol automatically.

Unlike static worksheets, this calculator adapts to your entries with smart rounding by default and an optional High precision mode when you need extra decimal accuracy. Because everything runs in your browser, it is private, secure, and lightning-fast. Nothing is uploaded or stored.

Whether you’re a student solving exercises, a professional auditing invoices, or just checking a restaurant bill, this tool makes percent math effortless. Pair it with our Word Counter for written assignments or Time Duration Calculator for project planning.

Key features

  • Instant percentage results — no submit button required
  • Smart rounding with optional High precision mode
  • Calculate percentage increase, decrease, and change
  • Find what percent one value is of another
  • Symmetric percentage difference calculator
  • Reverse percentage: find the original value
  • Convert fraction ↔ percentage
  • Percent of percent and apply to base
  • Discount calculator with local currency formatting
  • Tip & split calculator for bills
  • All computations run locally in your browser

Tips

  • Use negative values to test losses or reductions (e.g., −7.25).
  • Switch on High precision mode when auditing invoices or doing classwork.
  • The percent-of-percent feature is perfect for stacked discounts or tax-on-tax cases.
  • The percentage difference uses an average denominator for symmetric comparisons.
  • Copy clean results into your notes using the Markdown Editor for neat reports.

Frequently asked questions

Where do calculations run?
Everything runs in your browser only. No data leaves your device.
Does it support decimals and negatives?
Yes. You can enter decimals (12.5) or negatives (−7.25) and see results instantly.
How do I calculate percentage increase or decrease?
Enter the initial and final values in the Percentage change row. The tool shows exact percent with an arrow indicator.
What formula is used for percentage difference?
It uses the symmetric method: absolute difference divided by the average of both values, ×100.
How are currency symbols chosen?
We detect your browser’s locale/time-zone to pick a currency symbol. No IP or server lookup is used.

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