Authoritative definitions of the International System of Units and SI prefixes.
Unit conversion
Kilograms to Grams Converter
1 kg = 1,000 g. Enter a value to convert kg to g, then use the formula and table below. Displayed digits may be rounded.
Weight & massInstant result
Decimals
Formula result = input × 1 ÷ 0.001. 1 kg = 1,000 g
Nonzero results too small for the selected decimal places use scientific notation.
Nonzero results too small for the selected decimal places use scientific notation.
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 kg = 1,000 g. Apply the selected conversion formula to other input values.
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
Kilograms to Grams converts a value measured in Kilograms (kg) into the equivalent value in Grams (g). 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
- Kilograms and Grams represent the same weight & mass quantity.
- The input is expressed in kg; the output is expressed in g.
- The unit definitions and conventional relationship shown on this page apply.
Worked example
1 kg = 1,000 g. For another value, apply the same relationship and round only to the precision your source measurement supports.
When to use it
Good uses
- Read a kg measurement in a document that expects g.
- Compare a kilograms value with a value reported in grams.
- Check the kg to g arithmetic before copying the result into another calculation.
Limitations
Common mistakes to avoid
- Everyday language often says weight, but these units represent mass. Force requires a local gravitational acceleration.
- Round the output to a precision justified by the original measurement.
- Verify safety-critical, regulated, laboratory, and contractual conversions 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
How do I convert Kilograms to Grams?
result = input × 1 ÷ 0.001. Input is in kg; result is in g. 1 kg = 1,000 g. The displayed digits may be rounded.
What is 1 kg in g?
1 kg = 1,000 g. The displayed digits may be rounded.
Can I reverse the kg to g conversion?
Yes. Swap the source and target units in the converter. The reverse relationship converts g back to kg.
Is the Kilograms to Grams result exact?
The conversion follows the displayed unit relationship. Display rounding can hide additional digits, and measured inputs cannot become more accurate merely by changing units.