Convert Grams to Kilograms
1 gram (g) equals 0.001 kilograms (kg).
1 g = 0.001 kg
Type in either box. Scientific notation works: 1.5e-3.
Converting a list? Use the bulk gram to kilogram converter to paste a column from Excel.
How to Convert Gram to Kilogram
- 1 g = 0.001 kg
- 1 kg = 1000 g
- Example: convert 15 g to kg: 15 g = 15 × 0.001 kg = 0.015 kg
Formula
kg = g ÷ 1000
Derivation from SI units:
- 1 g = 10⁻³ kg
- SI base unit, fixed by the Planck constant h = 6.626 070 15 × 10⁻³⁴ J·s
Both units are defined exactly, so the factor is exact. Gram definition: gram; Kilogram definition: kilogram.
Worked examples
- A 750 g box is 0.75 kg.
750 g × 0.001 = 0.75 kg - 2500 g is 2.5 kg.
2500 g × 0.001 = 2.5 kg
Gram to Kilogram conversion table
| Grams (g) | Kilograms (kg) |
|---|---|
| 0.1 g | 0.0001 kg |
| 0.5 g | 0.0005 kg |
| 1 g | 0.001 kg |
| 2 g | 0.002 kg |
| 5 g | 0.005 kg |
| 10 g | 0.01 kg |
| 14 g | 0.014 kg |
| 20 g | 0.02 kg |
| 25 g | 0.025 kg |
| 28.35 g | 0.02835 kg |
| 30 g | 0.03 kg |
| 50 g | 0.05 kg |
| 75 g | 0.075 kg |
| 100 g | 0.1 kg |
| 113 g | 0.113 kg |
| 125 g | 0.125 kg |
| 150 g | 0.15 kg |
| 200 g | 0.2 kg |
| 250 g | 0.25 kg |
| 300 g | 0.3 kg |
| 454 g | 0.454 kg |
| 500 g | 0.5 kg |
| 750 g | 0.75 kg |
| 1000 g | 1 kg |
Where it's used
Gram totals are converted to kilograms for shipping, bulk ingredients and body-composition data. Divide by 1000.
Gram to other weight and mass units
| Conversion | 1 g equals |
|---|---|
| gram to kilogram | 0.001 kg |
| gram to milligram | 1000 mg |
| gram to microgram | 1000000 µg |
| gram to metric ton | 0.000001 t |
| gram to pound | 0.002204622622 lb |
| gram to ounce | 0.03527396195 oz |
| gram to stone | 0.0001574730444 st |
| gram to short ton | 0.000001102311311 ton (US) |
| gram to long ton | 9.842065276 × 10⁻⁷ ton (UK) |
| gram to grain | 15.43235835 gr |
| gram to troy ounce | 0.03215074657 oz t |
| gram to carat | 5 ct |
Frequently asked questions
How do I convert g to kg?
Divide by 1000: 450 g = 0.45 kg.
How many kilograms are in 1 gram?
1 g = 0.001 kg.
How do I convert grams to kilograms?
Multiply the value in g by 0.001, or divide it by 1000. For example, 15 g × 0.001 = 0.015 kg.
Is the g to kg conversion exact?
Yes. Both units are defined exactly, and 1 g is exactly 0.001 kg.
Sources
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Table 7, SI prefixes.
- The International System of Units (SI), 9th edition (SI Brochure), Bureau International des Poids et Mesures , Section 2.3.1, base unit definitions.
Last reviewed: . Factors are stored exactly and computed with 50-digit decimal arithmetic. See how we verify conversion factors.
Cite this page
APA
Scientific Converters. (2026, October 15). Convert Grams to Kilograms. Retrieved October 17, 2026, from https://scientificconverters.com/mass/grams-to-kilograms/
IEEE
Scientific Converters, "Convert Grams to Kilograms," scientificconverters.com. Accessed: Oct. 17, 2026. [Online]. Available: https://scientificconverters.com/mass/grams-to-kilograms/