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Convert across 10+ categories: Length, Weight, Temperature, Area, Volume, Speed, Energy, Pressure, Power, and Data Storage.
Convert between metric and imperial length units (mm, cm, m, km, in, ft, yd, mi).
Convert between Liters, Milliliters, Gallons, Quarts, Pints, Cups, and Fluid Ounces.
Calculate BMI from height and weight, with WHO category classification.
Estimate Basal Metabolic Rate (BMR) and daily calorie needs for maintenance or weight goals.
This weight converter switches instantly between milligrams, grams, kilograms, ounces, pounds, metric tons, and US tons, making it easy to move between metric and imperial mass units without doing the math yourself. It's a practical tool for cooks converting recipe ingredients, gym-goers tracking body weight across different scales, online shoppers comparing shipping weights, and students studying the metric system. Type a number into any field and every other weight unit updates instantly, calculated using precise standard conversion ratios. There's no software to install and no account to create — the calculator is free and ready to use immediately in your browser. Because all the math happens client-side, nothing you enter is ever sent to a server or stored, keeping the tool fast and completely private. Scroll down to enter a weight value and see it converted across every supported unit at once.
One kilogram equals approximately 2.20462 pounds.
Multiply the number of ounces by 28.3495 to get grams; this calculator does it instantly.
A metric ton equals 1,000 kilograms (about 2,204.6 lb), while a US ton (short ton) equals 2,000 pounds — they are not the same weight.
One ounce equals approximately 28.35 grams.
Yes, it uses standard conversion ratios accurate enough for recipes and kitchen use.
Yes, simply enter your weight in either unit and the converter instantly shows the equivalent.
What Is a Healthy BMI? The Ranges Explained
A healthy BMI range for adults is 18.5 to 24.9. See the full WHO BMI chart, what each category means, where the cut-offs come from, and how to read yours.
How Many Calories Do You Actually Need?
Daily calorie needs vary far more than the 2,000 kcal label figure suggests. See the general population ranges, what drives them, and how to estimate your own.
BMI for Athletes: Why Muscle Breaks the Formula
BMI for athletes routinely reads overweight or obese at low body fat. Here is why muscle mass breaks the formula and which metrics to track instead.