How many kilograms are in 1 gram?

1 g equals 0.001 kg. This is an exact conversion factor defined by NIST.

How do I convert grams to kilograms?

Multiply the value in g by the conversion factor. For example, 10 g = 0.01 kg. Use our calculator above for instant results.

Is the grams to kilograms conversion exact?

Yes, this conversion is mathematically exact based on the international definition of these units (NIST SP 811).

Can I convert grams to kilograms offline?

Yes! OmniConvert runs entirely in your browser — no internet connection needed after the page loads. Your data never leaves your device, ensuring complete privacy.

What is the difference between grams and kilograms?

Grams (g) and Kilograms (kg) are both units of mass but belong to different measurement systems. 1 g = 0.001 kg. Use the converter above to switch between them instantly.

Grams to Kilograms (g → kg) — Free Online Converter

g → kg Reference Table

g	kg
0.001 g	0.000001 kg
0.002 g	0.000002 kg
0.003 g	0.000003 kg
0.004 g	0.000004 kg
0.005 g	0.000005 kg
0.006 g	0.000006 kg
0.007 g	0.000007 kg
0.008 g	0.000008 kg
0.009 g	0.000009 kg
0.01 g	0.00001 kg
0.02 g	0.00002 kg
0.03 g	0.00003 kg
0.04 g	0.00004 kg
0.05 g	0.00005 kg
0.06 g	0.00006 kg
0.07 g	0.00007 kg
0.08 g	0.00008 kg
0.09 g	0.00009 kg
0.1 g	0.0001 kg
0.2 g	0.0002 kg
0.3 g	0.0003 kg
0.4 g	0.0004 kg
0.5 g	0.0005 kg
0.6 g	0.0006 kg
0.7 g	0.0007 kg
0.8 g	0.0008 kg
0.9 g	0.0009 kg
1 g	0.001 kg
1.5 g	0.0015 kg
2 g	0.002 kg
2.5 g	0.0025 kg
3 g	0.003 kg
3.5 g	0.0035 kg
4 g	0.004 kg
4.5 g	0.0045 kg
5 g	0.005 kg
5.5 g	0.0055 kg
6 g	0.006 kg
6.5 g	0.0065 kg
7 g	0.007 kg
7.5 g	0.0075 kg
8 g	0.008 kg
8.5 g	0.0085 kg
9 g	0.009 kg
9.5 g	0.0095 kg
10 g	0.01 kg
11 g	0.011 kg
12 g	0.012 kg
13 g	0.013 kg
14 g	0.014 kg
15 g	0.015 kg
16 g	0.016 kg
17 g	0.017 kg
18 g	0.018 kg
19 g	0.019 kg
20 g	0.02 kg
25 g	0.025 kg
30 g	0.03 kg
35 g	0.035 kg
40 g	0.04 kg
45 g	0.045 kg
50 g	0.05 kg
55 g	0.055 kg
60 g	0.06 kg
65 g	0.065 kg
70 g	0.07 kg
75 g	0.075 kg
80 g	0.08 kg
85 g	0.085 kg
90 g	0.09 kg
95 g	0.095 kg
100 g	0.1 kg
120 g	0.12 kg
125 g	0.125 kg
130 g	0.13 kg
140 g	0.14 kg
150 g	0.15 kg
160 g	0.16 kg
175 g	0.175 kg
180 g	0.18 kg
200 g	0.2 kg
225 g	0.225 kg
250 g	0.25 kg
275 g	0.275 kg
300 g	0.3 kg
350 g	0.35 kg
400 g	0.4 kg
450 g	0.45 kg
500 g	0.5 kg
600 g	0.6 kg
700 g	0.7 kg
750 g	0.75 kg
800 g	0.8 kg
900 g	0.9 kg
1000 g	1 kg
1200 g	1.2 kg
1250 g	1.25 kg
1500 g	1.5 kg
1750 g	1.75 kg
2000 g	2 kg
2500 g	2.5 kg
3000 g	3 kg
4000 g	4 kg
4500 g	4.5 kg
5000 g	5 kg
6000 g	6 kg
7000 g	7 kg
7500 g	7.5 kg
8000 g	8 kg
9000 g	9 kg
10000 g	10 kg
15000 g	15 kg
20000 g	20 kg
25000 g	25 kg
50000 g	50 kg
75000 g	75 kg
100000 g	100 kg

Values based on NIST SP 811 conversion factors

Why Convert Grams to Kilograms?

Converting between grams (g) and kilograms (kg) is one of the most common mass conversions. Whether for engineering, cooking, travel, or science, knowing how to quickly convert g to kg saves time and prevents errors.

Mass conversions from g to kg are vital in culinary arts, logistics, and pharmaceutical industries. Professional chefs and home bakers rely on precise ingredient conversions to replicate international recipes — a slight variation in flour or leavening agents can ruin the texture of a dish. In global shipping, freight costs and vehicle load limits depend on accurate weight calculations to ensure safety and compliance with transport regulations. Furthermore, in healthcare and chemistry, dosage calculations must be exact; confusing mass units can lead to ineffective treatments or dangerous overdoses. Reliable mass conversion ensures consistency across borders and disciplines.

How to Convert Grams to Kilograms

To convert grams to kilograms, use the following formula:

kg = g × 0.001

Example: 1 g = 0.001 kg

For example, 5 g = 0.005 kg, 10 g = 0.01 kg, and 100 g = 0.1 kg. For larger values, 1000 g = 1 kg. Conversely, 1 kg = 1000 g. Our calculator above performs this conversion instantly with full precision — no rounding errors.

Common Mistakes to Avoid

Mass vs Weight: confusing mass (kg) with weight/force (Newtons or lbs-force).
Ton variations: mixing up Short Ton (US), Long Ton (UK), and Metric Tonne.
Ounce confusion: confusing Ounces (weight) with Fluid Ounces (volume).

Pro Tips

Kitchen scales: Use the 'Tare' button to zero out container weight.
Water weight: 1 Liter of water weighs exactly 1 kg (at 4°C). Useful benchmark.
Conversion rule: To get kg from lbs, divide by 2.2 (approx halve it).

What is a Gram?

The gram (g) is a metric unit of mass equal to one-thousandth of a kilogram (0.001 kg). Originally defined as the mass of one cubic centimeter of water at 4°C.

Grams are widely used for small weights in cooking (ingredients), nutrition facts, chemistry, and postal services worldwide.

What is a Kilogram?

The kilogram (kg) is the base unit of mass in the International System of Units (SI). Originally defined by a platinum-iridium artifact, since 2019 it is defined by the Planck constant (h) set to 6.62607015×10⁻³⁴ J⋅s.

Kilograms are the global standard for measuring mass and weight in science, commerce, and daily life (body weight, groceries). Used nearly everywhere except the US.

Grams → Kilograms

Grams to Kilograms Formula