Math Tools
Utilities for mathematical calculations.
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Percentage Calculator
Run percent-of, percent-change, and ratio calculations.
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Length Converter
Convert between meters, feet, inches, and other length units.
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Fashion Size Converter
Compare clothing and shoe sizes across regional standards.
About Math Tools
LivHome's Math tools are a free collection of browser-based utilities for everyday calculations and unit conversions. Each one runs entirely in your browser, so the numbers you enter stay on your device.
This group covers three common tasks: a Percentage Calculator for working out discounts, shares of a total, change rates, and original values; a Length Converter for switching between metric (m, cm), imperial (inch, ft, yd), and traditional Korean units; and a Fashion Size Converter for matching shoe, clothing, and ring sizes across US, UK, EU, and Korean standards.
Choose the Percentage Calculator when a question involves a percent, such as a sale price or how much one number is of another. Use the Length Converter for measurements and the Fashion Size Converter when shopping across regions. All three calculate instantly from the values you type, with no server request.
Results are computed from the inputs and reference data you provide. For sizing, fit can vary by brand, so treat conversions as a starting point and check a maker's own size chart when it matters.
Frequently asked questions
- Are these math tools free to use?
- Yes. Every tool in this category is free with no sign-up or account required.
- Do they work in the browser without sending my data anywhere?
- Yes. Calculations and conversions run locally in your browser, so the numbers you enter are not uploaded to a server.
- Why don't fashion sizes always match between countries?
- Size standards differ by region and brand, so a converted size is a close estimate. Compare it with the seller's own size chart before buying.