Calculators & Units

Calculators & Units covers quick numeric conversions and percentage math in the browser. Live tools are Unit Converter and Percentage Calculator — no spreadsheet required for common one-off calculations.

Useful for students, shoppers comparing discounts, and anyone converting length, weight, temperature, or similar units while working through a form or recipe.

• Unit Converter
• Percentage Calculator

• Unit Converter — convert between units in supported categories (for example length, weight, temperature) when the problem is “X in unit A → unit B”.
• Percentage Calculator — compute percent of a number, discounts, markup, or percent change when the problem is relative to a base value.
• Need JSON/CSV reshaping? Use Converters. Need word counts for essays? Use Word Counter under Text Tools.

• Convert centimeters to inches for a shipping form.
• Switch a recipe temperature from °C to °F.
• Calculate 15% off a listed price or the markup from cost to sell price.
• Find percent change between last month’s metric and this month’s.

All arithmetic for these tools runs locally in your browser. ToolsArk does not upload the numbers you enter for Unit Converter or Percentage Calculator.

• Only the unit categories and percentage modes implemented in each tool are available — not a full scientific or financial modeling suite.
• Results follow ordinary floating-point browser math; critical engineering or legal calculations should be verified with domain-appropriate tools.
• Currency conversion with live exchange rates is not part of this category.

• Double-check you picked the right unit family (length vs weight) before trusting a result.
• For tabular unit lists you plan to reuse, export from Converters rather than retyping rows.

• Converters — JSON ↔ CSV for tabular data