What Is a Weight Converter?

A weight converter is a tool that transforms values between different units of mass and weight. Whether you need to convert kilograms to pounds for a recipe, calculate shipping weights, or understand precious metal measurements, this converter handles it all instantly.

Who Needs This Tool?

This weight converter is useful for:

Home Cooks & Bakers

Converting recipes between metric and imperial measurements

Fitness Enthusiasts

Tracking body weight across different unit systems

Travelers

Understanding weight limits for luggage in different countries

Jewelers & Traders

Working with troy ounces, pennyweights, and carats

Shipping Professionals

Calculating package weights for logistics

Students & Educators

Learning about measurement systems

Supported Unit Systems

The converter supports four main categories of weight units:

Metric System

International standard units for scientific and everyday use

Metric ton (t)
Kilogram (kg)
Gram (g)
Milligram (mg)
Microgram (μg)

Imperial System

Traditional units used in the US and UK

Pound (lb), Ounce (oz)
Dram (dr), Stone (st)
Hundredweight (US/UK)
Short ton, Long ton

Troy Weight

Specialized units for precious metals and gemstones

Troy ounce (oz t)
Pennyweight (dwt)
Carat (ct)
Grain (gr)

Regional Units

Traditional units used in specific regions

Tola — South Asian gold measurement

How Calculations Work

Privacy First: All conversions happen instantly in your browser. When you enter a value, the tool converts it to a base unit (kilograms) and then calculates the equivalent in all other units using precise, internationally recognized conversion factors.

Your data stays completely private — no values are sent to any server. Everything runs locally on your device.

Table of Contents

1. What Is a Weight Converter?
2. How to Use the Weight Converter
3. Features
4. Frequently Asked Questions

How to Use the Weight Converter

Converting weight units takes just a few simple steps. Here's how to get accurate results quickly.

Enter Your Value

Type the number you want to convert in the input field. The converter accepts:

Whole numbers (e.g., 100)
Decimal numbers (e.g., 2.5)
Large numbers with automatic thousand separators (e.g., 1 000 000)

Tip: If you leave the field empty, the converter shows results for a value of 1.

Select Your Source Unit

Click the unit dropdown next to the input field. You can:

Scroll through the organized list (Metric, Imperial, Troy, Regional)
Search by typing in the search box (e.g., type "pound" to find lb)
Use keyboard — arrow keys to navigate, Enter to select

View Your Results

Results appear instantly, organized by unit category. Each row shows:

The converted value with your chosen precision
The unit symbol and full name
A copy button to quickly grab that value

Customizing Your Experience

Click the Customize button to access additional options:

Show/Hide Units

Toggle specific units on or off to focus on what you need

Decimal Precision

Choose from 0 to 8 decimal places for your results

Your preferences are saved automatically and persist across sessions.

Copying Results

Two ways to copy converted values:

Single value: Hover over a result row and click the copy icon
All results: Click the "Copy All Results" button below the results

Quick Tips

Use a comma or period for decimals — both work the same
The source unit is automatically hidden from results to avoid confusion
Click the rotate icon to reset the input field

Features

This weight converter includes everything you need for accurate, efficient unit conversions.

Comprehensive Unit Support

Convert between 18 different weight and mass units spanning multiple measurement systems

Metric system: micrograms to metric tons
Imperial/US customary: pounds, ounces, stones
Troy weight: precious metals units
Regional units: traditional measurements

Finding the right unit is fast and intuitive

Real-time search filtering
Units organized by category
Full keyboard navigation
Clear symbol and name display

Adjustable Precision

Control decimal places in your results

0 to 8 decimal places
Whole numbers for quick estimates
High precision for scientific calculations

Customizable Display

Focus on the units that matter to you

Toggle individual units on/off
Automatic preference saving
Streamlined results without clutter

Easy Copy Functionality

Get converted values where you need them

One-click copy for individual values
Copy all results at once
Visual feedback confirms copies

Smart Input Formatting

The input field helps you enter values correctly

Automatic thousand separators
Accepts comma and period decimals
Input validation prevents errors

Unit Reference Guide: Expand the reference section to see all available units with their symbols and conversion equivalents. Useful for understanding unfamiliar units or double-checking your work.

Works Everywhere

The converter is fully responsive and works on:

Desktop Computers

Full-featured experience

Tablets

Touch-optimized interface

Mobile Phones

On-the-go conversions

Dark mode support ensures comfortable use in any lighting condition.

Frequently Asked Questions

What's the difference between weight and mass?

In everyday use, weight and mass are often used interchangeably. Technically, mass measures the amount of matter in an object (measured in kilograms), while weight is the force of gravity on that mass (measured in newtons).

Practical Note: For practical purposes on Earth, this converter treats them as equivalent since the gravitational force is relatively constant.

Why are there two different hundredweights (US and UK)?

This historical difference stems from different measurement standards:

US (Short)

US Hundredweight

100 pounds
Short ton = 2,000 pounds

UK (Long)

UK Hundredweight

112 pounds
Long ton = 2,240 pounds

What is a troy ounce?

A troy ounce is a unit used specifically for precious metals like gold, silver, and platinum. It equals approximately 31.1 grams, which is heavier than a regular (avoirdupois) ounce at 28.35 grams.

Important: When you see gold prices quoted per ounce, they mean troy ounces, not regular ounces.

What is a tola?

A tola is a traditional unit of weight used in South Asia, particularly India and Pakistan, for measuring gold. One tola equals approximately 11.66 grams.

It remains widely used in gold markets across the region and is an essential unit for jewelry trading in South Asian countries.

How accurate are the conversions?

The converter uses internationally recognized conversion factors with high precision. Results are accurate for all practical purposes.

You can adjust the decimal precision from 0 decimals to 8 decimals depending on how exact you need your results.

Why does my input show spaces in the numbers?

Large numbers automatically display with thousand separators (spaces) to make them easier to read. For example, one million appears as 1 000 000 rather than 1000000.

This formatting doesn't affect the calculation — it's purely for readability.

Can I use a comma instead of a period for decimals?

Yes. The converter accepts both formats. Whether you type 2.5 or 2,5, it will be interpreted correctly as two and a half.

How do I convert between metric and imperial quickly?

Common quick references for mental calculations:

Metric to Imperial

1 kg ≈ 2.2 lb
1 g ≈ 0.035 oz

Imperial to Metric

1 lb ≈ 454 g
1 oz ≈ 28 g
1 stone ≈ 6.35 kg

Is my data private?

100% Private: All calculations happen directly in your browser. No values are sent to any server, and nothing is logged or tracked. Your conversion history and preferences are stored locally on your device only.

Why isn't a specific unit showing in my results?

There are two possible reasons:

You toggled it off: Click Customize and ensure the unit checkbox is enabled
It's your source unit: The unit you're converting from is intentionally hidden from results since it would just show the same value you entered