QuickKit

Percentage & Money

Percent of, discounts, tips, and percentage change.

Final price
$599.20 (save $149.80)

Examples

  • Discount
    20% off $749
    → $599.20 (save $149.80)
  • Tip
    15% tip on $60
    → $9.00 tip ($69.00 total)
  • Percent of
    18% of 250
    → 45
  • Percentage change
    120 → 90
    → −25% (decrease)

What it does

Percentage & Money handles the four most common everyday percentage calculations: percent of a number, discounts, tips, and percentage change between two values.

When you need it

Discount shopping, tipping at a restaurant, comparing two prices, or working out how much something grew or shrank — Percentage & Money gives the answer immediately and deterministically.

How it works locally

All calculations run in a centralized TypeScript engine. The graphical tool on this page and the global Quick Command bar call the exact same calculation code — there is no duplicated logic to drift out of sync. Nothing you type leaves your browser.

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