Authoritative definitions of the International System of Units and SI prefixes.
Unit converters
Weight & mass
Enter your values below for a clear, instant result.
Weight & massInstant result
Decimals
Formula result = input × 1 ÷ 0.001. 1 kg = 1,000 g
Common examples
One value, several units
Grams1,000 g
Milligrams1,000,000 mg
Metric tonnes0.001 t
Pounds2.2046 lb
Ounces35.274 oz
Stone0.1575 st
Conversion table
| kg | g |
|---|---|
| 1 kg | 1,000 g |
| 2 kg | 2,000 g |
| 5 kg | 5,000 g |
| 10 kg | 10,000 g |
| 25 kg | 25,000 g |
| 50 kg | 50,000 g |
| 100 kg | 100,000 g |
Conversion chart
1 kg1,000 g
5 kg5,000 g
10 kg10,000 g
25 kg25,000 g
50 kg50,000 g
Worked example
1 kilogram equals 2.20462 pounds.
Unit definition
Kilograms (kg) One kilograms equals 1 kilogram.
Unit history
The kilogram began with the metric system and was redefined in 2019 through a fixed value of the Planck constant.
Step by step
1. Parse the value, including fractions.
2. Convert kg to kilogram.
3. Convert the base value to g and apply your display precision.
Understand the result before using it
Weight & mass changes a mass value between metric and customary units; it does not calculate gravitational force. The numerical value changes because the size and definition of the selected unit changes; the underlying quantity does not.
Calculated result
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.
Formula, assumptions, and example
Formula
result = input × 1 ÷ 0.001
Assumptions
- The source and target selections represent the same physical quantity or supported notation.
- The entered value is valid for the selected relationship and uses the source unit shown.
- Published unit definitions and conventional conversion factors apply under their stated conditions.
Worked example
1 kilogram equals 2.20462 pounds.
When to use it
Good uses
- Translate a weight & mass value found in a document, specification, recipe, or measurement.
- Compare values reported in different unit systems.
- Check a manual conversion and control the displayed precision.
Limitations
Common mistakes to avoid
- Everyday language often says weight, but these units represent mass. Force requires a local gravitational acceleration.
- Do not add meaningful digits beyond the precision of the original measurement.
- Confirm regulated, safety-critical, laboratory, and contractual values against the controlling standard.
Sources and further reading
These references explain the underlying standards or provide authoritative context. Your own contract, institution, clinician, product documentation, local code, or governing standard may be the controlling source.
Guidance on unit names, symbols, conversions, and numerical presentation.
Questions about this calculation
What does the Weight & mass converter do?
Weight & mass changes a mass value between metric and customary units; it does not calculate gravitational force. It does not change the physical quantity represented by the input.
What formula does the Weight & mass converter use?
result = input × 1 ÷ 0.001
Why can a Weight & mass converter result be rounded?
UnitMora calculates with JavaScript double-precision numbers, then formats the result using your selected decimal or significant-figure setting. The unrounded value may contain more digits than are displayed.
What is the most common weight & mass conversion mistake?
Everyday language often says weight, but these units represent mass. Force requires a local gravitational acceleration.
Clear answers, without the guesswork
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