To convert millilitres of onion powder into grams, multiply by 0.48607658: one millilitre comes to 0.48607658 grams. Every ingredient has its own figure here, because the units are measuring different things and only the density links them.
Put next to water — 1 g per mL exactly — onion powder measures 0.48608 g per mL. That ratio, 48.61%, is what separates this page from every other ingredient in the same units, and it is measured rather than defined.
Onion powder has a density of 0.48608 g per mL, so 100 mL of it weighs 48.61 g and 250 mL weighs 121.5 g. That single figure is what every other number on this page is built from — water is 1.00 g per mL, so this ingredient is 48.61% as heavy as the same volume of water.
Grams are the unit this conversion is really for. A domestic scale resolves to a gram, which is 0.87% of a cup of onion powder, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 4.348 cups, and a 1 kg pack 8.696.
How the figure is arrived at: Hygroscopic — it pulls in moisture and cakes, and a caked spoonful weighs more than a free-flowing one.
The formula
millilitres- The amount of onion powder you are converting, in millilitres
0.486076576339- Grams per millilitre for onion powder, from its density of 0.48608 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in millilitres.
- It is multiplied by 0.486076576339, the grams-per-millilitre figure for onion powder.
- The result appears in grams, with a second reading in oz beneath it.
- Use the measure table if you want a standard recipe quantity rather than a number you type in.
Worked examples
15 mL of onion powder in grams
15 mL of onion powder weighs out at 7.29115 grams. Divide 7.29115 by 0.48607658 and you get back to 15 mL, which is the quickest check that the factor is the right way up.
100 mL of onion powder in grams
100 mL of onion powder weighs out at 48.6077 grams. Divide 48.6077 by 0.48607658 and you get back to 100 mL, which is the quickest check that the factor is the right way up.
250 mL of onion powder in grams
Take 250 mL of onion powder: 250 × 0.48607658 gives 121.519 grams. Doubling the batch takes it to 243.038 grams, because the relationship is a straight proportion once the density is known.
How to read your score
Frequently asked questions
How many grams are in 1 mL of onion powder?
One millilitre of onion powder is 0.48607658 grams. Half that quantity is 0.243038 grams and double it is 0.972153 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of onion powder not 236 g like water?
Because weight per cup depends on what is in the cup. Onion powder has a density of 0.48608 g per mL where water has 1.00, so a cup of it weighs 115 g rather than 236.6 g. That is a difference of 121.6 g per cup, and it is the reason a single volume-to-weight factor cannot be applied to every ingredient.
Does how I measure it change the weight?
Yes, and by more than most people expect. Handling changes the weight of a cup of onion powder by roughly 20% — about 11.5 g either side of 115 g — because hygroscopic — it pulls in moisture and cakes, and a caked spoonful weighs more than a free-flowing one. Weighing removes the question entirely.
Is a fluid ounce of onion powder the same as an ounce?
No. A fluid ounce is a volume — one eighth of a US cup, 29.57 mL — and an ounce is a weight. One fluid ounce of onion powder weighs 0.5071 oz, so the two readings differ by 49.3%. They coincide only for something with the density of water, and then only roughly.
Is this a US cup or a metric cup?
US customary: 236.59 mL, which is the cup every US recipe means. A metric cup is 250 mL, so the same cup of onion powder would weigh 121.52 g instead of 115 g — 6.52 g more, or 5.67%. Australian and some European recipes use the metric cup, and the difference is large enough to matter in baking.
Do I need a scale for this, or will measuring cups do?
At this size the spoon wins. One millilitre of onion powder is 0.4861 g, and a scale reading to the nearest gram is working at 206% resolution on that — a measuring spoon is the more accurate instrument below about 5 g, which is why spice quantities are still written in spoons.
How many millilitres of onion powder is 500 g?
500 g of onion powder is 1028.6 millilitres — 2.05729 millilitres to one gram, so 500 × 2.05729 = 1028.6. Going that way is a division by 0.486077, or a multiplication by 2.05729 if you prefer.
Onion powder in millilitres and grams
| Millilitres | Grams | Unrounded |
|---|---|---|
| 5 mL | 2.43038 g | 2.430382882 |
| 10 mL | 4.86077 g | 4.860765763 |
| 15 mL | 7.29115 g | 7.291148645 |
| 30 mL | 14.5823 g | 14.58229729 |
| 50 mL | 24.3038 g | 24.30382882 |
| 100 mL | 48.6077 g | 48.60765763 |
| 125 mL | 60.7596 g | 60.75957204 |
| 150 mL | 72.9115 g | 72.91148645 |
| 200 mL | 97.2153 g | 97.21531527 |
| 250 mL | 121.519 g | 121.5191441 |
| 500 mL | 243.038 g | 243.0382882 |
Based on 115 g per cup of onion powder. One millilitre of onion powder is 0.48607658 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 115 g | 4.06 oz | 236.6 mL |
| 1 tbsp | 7.188 g | 0.254 oz | 14.79 mL |
| 2 tsp | 4.792 g | 0.169 oz | 9.858 mL |
| 1 tsp | 2.396 g | 0.0845 oz | 4.929 mL |
| 3/4 tsp | 1.797 g | 0.0634 oz | 3.697 mL |
| 1/2 tsp | 1.198 g | 0.0423 oz | 2.464 mL |
| 1/4 tsp | 0.599 g | 0.0211 oz | 1.232 mL |
| 1/8 tsp | 0.2995 g | 0.0106 oz | 0.6161 mL |
US customary measures: 1 cup = 236.59 mL, 1 tbsp = 14.79 mL, 1 tsp = 4.93 mL.
| Ingredient | Grams per cup | Ounces per cup | Density (g/mL) |
|---|---|---|---|
| Ground nutmeg | 106 g | 3.739 oz | 0.448 |
| Ground black pepper | 110 g | 3.88 oz | 0.4649 |
| Paprika | 110 g | 3.88 oz | 0.4649 |
| Onion powder (this page) | 115 g | 4.057 oz | 0.4861 |
| Ground cinnamon | 125 g | 4.409 oz | 0.5283 |
| Chili powder | 125 g | 4.409 oz | 0.5283 |
| Garlic powder | 134 g | 4.727 oz | 0.5664 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.