This converter turns kilograms into grams instantly, using the exact factor 1 kilogram = 1000 grams. Type any number and the result updates as you go — nothing is sent to a server, so the arithmetic happens entirely in your browser.
The SI base unit of mass, redefined in 2019 in terms of the Planck constant. One thousandth of a kilogram — the workhorse unit of cooking and postage.
Because the relationship is a simple proportion, one multiplication does the whole job. The table further down gives pre-computed values for the amounts people look up most often, and the result panel also reports the reverse conversion so you can check the figure both ways.
The formula
kilograms- The amount you are converting, measured in kilograms
1000- The exact number of grams in one kilogram
grams- The converted result
How it works, step by step
- Enter the number of kilograms you want to convert.
- The value is multiplied by 1000, the exact conversion factor.
- The result is displayed in grams, rounded for readability.
- The unrounded value and the reverse conversion appear underneath so you can verify it.
Worked examples
Converting 5 kilograms
Multiply 5 by 1000. That gives 5,000 grams. A quick sanity check: one kilogram is larger than one gram, so the number should get bigger — and it does.
Converting 72 kilograms
72 × 1000 = 72,000 grams. Working backwards, 72,000 ÷ 1000 returns 72 kilograms, which confirms the factor is applied the right way round.
How to read your score
Frequently asked questions
How many grams are in one kilogram?
Exactly 1000. Every conversion on this page is that single number multiplied by your input, so the result carries no rounding error beyond what is shown.
What is the formula to convert kilograms to grams?
Grams = kilograms × 1000. To reverse it, divide instead: kilograms = grams ÷ 1000, which is the same as multiplying by 0.001.
Is the kilogram bigger than the gram?
Yes. One kilogram equals 1000 grams, so it is the larger unit.
Why does my answer differ slightly from other kg to grams converters?
Most differences come from rounding the factor too early. This tool keeps full double precision through the calculation and only rounds at the final display step, and it also shows the unrounded value so you can see exactly where any difference appears.
What is a kilogram?
The SI base unit of mass, redefined in 2019 in terms of the Planck constant.
What is a gram?
One thousandth of a kilogram — the workhorse unit of cooking and postage.
Kilograms to grams reference table
| Kilograms | Grams |
|---|---|
| 0.5 kg | 500 g |
| 1 kg | 1,000 g |
| 2 kg | 2,000 g |
| 3 kg | 3,000 g |
| 5 kg | 5,000 g |
| 10 kg | 10,000 g |
| 15 kg | 15,000 g |
| 20 kg | 20,000 g |
| 25 kg | 25,000 g |
| 50 kg | 50,000 g |
| 75 kg | 75,000 g |
| 100 kg | 100,000 g |
| 250 kg | 250,000 g |
| 500 kg | 500,000 g |
| 1000 kg | 1,000,000 g |
Exact factor: 1 kilogram = 1000 grams. Values rounded for display.