Mass Unit Converter

Supports precise conversion between multiple mass units such as grams, kilograms, pounds, and ounces, covering metric, imperial, and jewelry units.

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Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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Tool Usage

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1Settings

2Convert

3Copy/Export

Input ValueSupports decimals, negatives, and scientific notation

From Unit

Main Result Unit

Quick Input

Batch DataOne value per line, units optional

Use “value unit symbol”. If no unit is given, the default source unit below is used.

Default From Unit

Target Unit

Display Precision

Number Format

Copy Format

Main result

1 gram = 0.001 kilograms

Select parameters to start conversion.

Gram baseline1 g

Unit categoryMetric units

Result count18 units

Common references

Copy & batch results

Instructions

Software Usage Instructions

Select a conversion mode: Use “Single Conversion” to process one mass value, or “Batch Conversion” to process multiple lines of weight data.
Enter the mass value: Fill in the value to be converted in the input box. Decimals, negative numbers, and scientific notation are supported; you can also click sample data or quick input buttons.
Select the source and target units: Choose from metric, imperial, jewelry units, apothecaries’ and precious metal units, and Chinese customary units, such as grams, kilograms, pounds, ounces, carats, grains, jin, and more.
Set display options:
- Display precision: Choose smart precision or a fixed 2-12 decimal places.
- Number format: Choose plain numbers, thousands separators, or scientific notation.
- Copy format: Choose a text list or CSV table format.
Start conversion: Click “Start Conversion and Continue” to display the main result, results for all units, and copyable content.
Batch conversion: Enter one value per line, in formats such as “500 g”, “2.5 kg”, “16 oz”, or “150 lb”; if no unit is specified, the default source unit will be used. The interface previews only the first 20 lines, while copying and CSV export retain all results.
Copy and export: Click an individual result to copy it, click “Copy All Results” to copy the complete conversion content, or download a CSV file.
Save settings: Click “Save Settings” to save your commonly used units, precision, and formats, which will be loaded automatically the next time you open the tool.

Frequently Asked Questions

A: 1 kilogram equals 1000 grams, and 1 gram equals 0.001 kilograms. Kilograms or grams are commonly used for body weight, parcel weight, and ingredient measurements in daily life.

A: 1 pound equals 0.45359237 kilograms, or 453.59237 grams. Converting between pounds and kilograms is often needed for fitness body weight, overseas product specifications, and logistics weight.

A: The regular ounce is commonly used for the weight of food and everyday goods; 1 ounce equals 28.349523125 grams. The troy ounce is commonly used for measuring precious metals; 1 troy ounce equals 31.1034768 grams. Do not mix the two.

A: 1 carat equals 0.2 grams, or 200 milligrams. Carats are commonly used for weighing gemstones and pearls, and a diamond “point” is usually calculated as 100 points per 1 carat.

A: A metric ton equals 1000 kilograms; a short ton equals 2000 pounds, about 907.18474 kilograms; a long ton equals 2240 pounds, about 1016.0469088 kilograms. In trade and transportation contexts, be sure to confirm which type of ton is being used.

A: Each line can use the format “value unit”, for example 500 g, 2.5 kg, 16 oz, 150 lb, 1 carat, 2 jin. Lines without a unit will be processed using the default source unit.

A: When a result is very large or very small, scientific notation reduces the number of consecutive zeros and makes it easier to read. You can also switch to regular numbers or thousands separators in “Number Format”.