Utilities calculators
English utility tools focus on browser-based tasks that work across countries: text measurement, percentage math, encoding, passwords, colors, and other everyday productivity workflows.
9 calculators
- Percent CalculatorCalculate percentages, percentage change, discounts, increases, decreases, and ratios in one focused tool.
- Unit ConverterConvert length, weight, temperature, volume, time, data, speed, and energy units in your browser.
- Date CalculatorCalculate date differences, add or subtract time, and check countdowns between calendar dates.
- BMI CalculatorCalculate body mass index, healthy weight range, BMR, daily calories, and estimated body fat.
- Character Count ToolCount characters, words, lines, UTF-8 bytes, and compare two text versions directly in your browser.
- JSON FormatterFormat, validate, minify, and inspect JSON directly in your browser.
- Regex TesterTest JavaScript regular expressions, flags, match positions, capture groups, and highlighted results.
- Password GeneratorGenerate random passwords with adjustable length, character groups, and estimated entropy.
- Base64 Encoder and DecoderEncode and decode UTF-8 text with standard or URL-safe Base64 output.
How to use utilities calculators
Mowatool calculators run in the browser without sign-up or installation. Choose a calculator, adjust the assumptions, and compare the results before making a decision. English pages are published gradually, and each completed page keeps its Korean counterpart linked through canonical and hreflang metadata.