Convert weight between kg, g, lb, oz, and stone. Supports both metric and imperial systems. Input never leaves your device — everything runs locally in your browser.
Content reviewed October 2026 · About Toolzum
Convert between time units including seconds, minutes, hours, days, weeks, months, and years with precise decimal results. Input never leaves your device — everything runs locally in your browser.
Convert between hundreds of units — length, mass, volume, temperature, area, speed, time, digital data, and more with a single click.
Convert Unix timestamps to human-readable dates and back. Shows UTC, ISO 8601, locale, date, and time formats. Milliseconds, seconds, and ISO 8601 convert both directions with timezone clarity — local math, free, no signup.
Computes Body Mass Index from metric or imperial height and weight inputs, categorizing the result into underweight, normal, overweight, and obese, with a healthy weight range for your height. Health data never leaves your device — every calculation runs locally in your browser.
Compute children's BMI from height and weight with metric/imperial inputs and a healthy-range readout for growth tracking. See where a 10-year-old sits — free, local, informational only.
1 kilogram = 2.20462 pounds. The converter uses this factor for all weight calculations.
A bag of sugar, a liter of water, or a small pineapple all weigh approximately 1 kg (2.2 lb).
1 pound = 16 ounces exactly. This is the standard avoirdupois weight system used in the US and UK.
A stone is a British unit equal to 14 pounds or approximately 6.35 kg. It is commonly used for body weight in the UK and Ireland.
Yes. All conversions run locally in your browser. No data is uploaded or stored.
Volume Converter
Convert volume between liters, mL, gallons, quarts, fl oz, and cups. Handy for cooking, science, and travel. Input never leaves your device — everything runs locally in your browser.
Unit Converter
Convert between hundreds of units — length, mass, volume, temperature, area, speed, time, digital data, and more with a single click.