Percentage calculator

  1. Input
  2. Result

Change uses the original value as its base; difference uses the mean of two non-negative values. The formula and inputs are included in the report.

Calculate percentages online

Use one compact calculator for percent-of, ratio percentage and increase or decrease scenarios.

It helps with pricing, reports, discounts and quick everyday calculations.

Quick start

Calculate a share, markup, discount, percentage change or original value.

  1. Choose the calculation task
  2. Enter both numbers
  3. Calculate and export the formula and result
✓ The tool runs directly in the browser and is ready for quick checks without installing software.
✓ Input can be cleared and recalculated immediately, which is useful for repeated small tasks.
✓ Use fullscreen mode when you need more space for long text, structured data or large result blocks.
✓ Copy buttons are available on generated output so results can be reused in code, documents or support chats.
✓ Most operations are deterministic: the same input and options produce the same output.
✓ For sensitive content, prefer local browser tools and review the result before sharing it further.

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