# Kilograms to grams converter

> Convert kilograms to grams (kg to grams) with the exact factor, a conversion chart and worked steps.

Interactive version: https://www.calcopenly.com/conversion/kg-to-grams
Subject: Unit converters

Kilogram labels are used for luggage allowances, bulk ingredients and body mass. Converting a whole or fractional kilogram into smaller units is useful when a scale or recipe expects a finer denomination. Keep the measurement's original precision instead of assuming every displayed digit was measured.

One kilogram is exactly 1,000 grams, so 1.5 kg is 1,500 g. To convert kg to grams, multiply by 1,000; to convert back, multiply by 0.001.

The gram is one thousandth of a kilogram, the SI base unit of mass. Because both units are defined exactly, the factor above is exact and the results here carry no conversion error.

## Inputs

- **Kilograms (kg)**

## Results

- Grams (g) — main result
- Conversion
- 1 g in kilograms (kg)

## Formula

$$
\text{grams} = \text{kilograms} \times 1{,}000
$$

## Worked examples

### 1.5 kg to g

- Kilograms (kg): 1.5 kg
- **Grams: 1,500 g**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 0.75 kg to g

- Kilograms (kg): 0.75 kg
- **Grams: 750 g**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

### 5 kg to g

- Kilograms (kg): 5 kg
- **Grams: 5,000 g**
- Checked against: Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions)

## Questions

### How many grams do I weigh out for 1.5 kg?

1.5 kg is 1,500 g. Multiply by 1,000 to express the bulk amount on a gram scale. The decimal part, 0.5 kg, contributes another 500 g; it is not an extra 5 g.

### How many grams are in a kilogram?

One kilogram is exactly 1,000 grams. The gram is one thousandth of a kilogram, the SI base unit of mass.

### How do you convert kg to grams?

Multiply the number of kilograms by 1,000. For example, 1.5 kg × 1,000 = 1,500 g. To go the other way, divide by 1,000.

### How accurate is the kilograms to grams converter?

Accuracy depends on your inputs and the method's assumptions. Decimal arithmetic uses 50 significant digits, but estimates, numerical methods and source data can be less precise; the displayed rounding does not remove those limits. It is checked against 3 worked examples whose answers come from independent sources; for example, “1.5 kg to g” is checked against Exact-fraction computation from the legal unit definitions (scripts/gen-pairs.py, Python fractions).

### Where does the method come from?

NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B; NIST Handbook 44, Appendix C: General tables of units of measurement; BIPM, The International System of Units (SI Brochure), 9th edition.

## Sources

- [NIST SP 811 (2008), Guide for the Use of the International System of Units, Appendix B](https://www.nist.gov/pml/special-publication-811)
- [NIST Handbook 44, Appendix C: General tables of units of measurement](https://www.nist.gov/pml/weights-and-measures/publications/nist-handbooks/handbook-44)
- [BIPM, The International System of Units (SI Brochure), 9th edition](https://www.bipm.org/en/publications/si-brochure)