ToolKitSphereWeight & Mass Unit Converter: kg, lb, g, oz & Tons
Convert between metric and imperial weight units (mg, g, kg, oz, lb, metric ton, US ton).
Output will appear here
Click in the output to select all text
Related tools
Comprehensive Multi-Unit Converter
Convert across 10+ categories: Length, Weight, Temperature, Area, Volume, Speed, Energy, Pressure, Power, and Data Storage.
Length Unit Converter
Convert between metric and imperial length units (mm, cm, m, km, in, ft, yd, mi).
Volume & Capacity Unit Converter
Convert between Liters, Milliliters, Gallons, Quarts, Pints, Cups, and Fluid Ounces.
Body Mass Index (BMI) & Ideal Weight Calculator
Calculate BMI from height and weight, with WHO category classification.
BMR & Daily Calorie Needs Calculator
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.
Features
- Converts between mg, g, kg, oz, lb, metric ton, and US ton
- Instant, live updates as you type any value
- Bidirectional metric-imperial conversion
- Precise decimal output for cooking, fitness, and shipping
- Simple single-page interface with no extra steps
- Works on any device with a browser
Why use this weight unit converter?
- Instant conversion with no delay
- Fully private — calculations stay in your browser
- Accurate standard conversion factors
- Easy to use with no instructions needed
- Completely free, unlimited conversions
Frequently asked questions
How many pounds are in a kilogram?
One kilogram equals approximately 2.20462 pounds.
How do I convert ounces to grams?
Multiply the number of ounces by 28.3495 to get grams; this calculator does it instantly.
What is the difference between a metric ton and a US ton?
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.
How many grams are in an ounce?
One ounce equals approximately 28.35 grams.
Is this weight converter accurate for cooking measurements?
Yes, it uses standard conversion ratios accurate enough for recipes and kitchen use.
Can I convert pounds to kilograms for body weight tracking?
Yes, simply enter your weight in either unit and the converter instantly shows the equivalent.
From the blog
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.