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Batch Toolkit All-in-One Tools

Percentage Calculator

Calculate percentages online for discounts, markup, percent change, and percent of number scenarios with instant summaries.

Pick a percentage scenario

Switch modes to handle discounts, markup, change analysis, or compound projections without leaving the page.

Calculate what portion you get when applying a percentage to a base value.

Percentage you want to apply to the base value.

The number you want to take the percentage of.

Adjust decimal places to align the output with your report or currency format.

Result

15% of 200

30

Portion of the base amount

Key figures
  • Base value200
  • Percentage applied15%
  • Multiplier×0.15
Additional insight
  • Portion result30
  • Amount remaining170
Summary
  • 15% of 200 equals 30.
  • Multiplier applied: ×0.15.
  • Remaining amount after the portion: 170.
How to get the most from this calculator

Every scenario is tuned for a common percentage task. The tool keeps everything on-device and updates as soon as you tweak a value.

  • Use the scenario switcher to jump between discounts, markup, or comparison maths without re-entering shared numbers.
  • Change the rounding precision when you need currency-friendly outputs or more granular engineering values.
  • Compound change applies the same rate repeatedly, perfect for interest, growth targets, and depreciation planning.
  • The summary section is clipboard-ready so you can paste a quick explanation into documentation or chat.
Quick example ideas
  • Compare a sale price against the original to see the exact discount percentage.
  • Model monthly growth by compounding a recurring percentage over a chosen number of periods.
  • Work out tax, tips, or commissions by applying a percentage to the base amount and copying the breakdown.

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