Skip to tool
All tools
FeuTex · free tools runs in-browser no bloat built by LiMiT

Online Percentage Converter

Convert between percent, decimal, and fraction, or compute common percentage results like X% of Y and percent change. Outputs are compact and easy to copy.

Category: Finance · URL: /tools/online-percentage-converter.html
Example: 12.5% → 0.125
Example: 0.075 → 7.5%
Example: 12.5% → 1/8
Example: 3/8 → 37.5%
Example: 15% of 200 → 30
Formula: ((B − A) / A) × 100
Related tools
Privacy: runs locally in your browser. No uploads, no tracking scripts.

How to use

Pick a conversion type, enter your values, then press Convert.

  1. Select a mode (e.g., Percent → Decimal, X% of Y, Percent change).
  2. Enter the required number(s) (fractions like 3/8 are supported where shown).
  3. Click Convert to generate a copy-ready result.
Keywords this page targets (natural cluster): online percentage converter, percent to decimal converter, decimal to percent converter, percent to fraction converter, fraction to percent converter, convert percentage to number, calculate x percent of y, percentage of a number calculator, percent increase calculator, percent decrease calculator, percent change from a to b, percentage difference calculator, how to convert percent to decimal, how to convert decimal to percent, turn fraction into percent, turn percent into fraction, convert 12.5 percent to decimal, convert 0.075 to percent, what is 15 percent of 200, percent change formula calculator
Secondary intents covered: Convert a percent into a decimal for calculations, Convert a decimal value into a percent for reporting, Convert a percent into a simplified fraction, Convert a fraction into a percent, Calculate what X% of a number is, Find percent change between two values (increase/decrease), Double-check percentage math for invoices, discounts, or tax, Copy a clean result string to paste into a spreadsheet or report

FAQ

How do I convert a percent to a decimal?

Divide by 100. For example, 12.5% becomes 0.125.

How do I convert a decimal to a percent?

Multiply by 100 and add the % sign. For example, 0.075 becomes 7.5%.

Can this convert percentages to simplified fractions?

Yes—use “Percent → Fraction” and it will reduce the fraction (e.g., 12.5% → 1/8).

What formats are supported for fractions?

Use a/b with integers, like 3/8 or -5/2; the denominator cannot be 0.

How do I calculate X% of a number?

Use “X% of Y”; it computes (X ÷ 100) × Y and prints the result.

What is the percent change formula?

Percent change from A to B is ((B − A) / A) × 100; increases show a + sign.

Why is percent change not allowed when A is 0?

Because the formula divides by A, and division by zero is undefined.