Millilitres of tomato sauce to grams runs on one number, 1.0355544 grams per millilitre. It is a measured property of this ingredient rather than a defined conversion, which is why a generic volume-to-weight tool cannot give you it.
Water is the yardstick: 1 mL of it weighs 1 g. Tomato sauce comes in at 1.0356 g per mL, or 103.6% of water, which is why a cup of it is 245 g rather than 236.6 g. Volume and weight only line up for water, and only in metric.
Tomato sauce has a density of 1.0356 g per mL, so 100 mL of it weighs 103.6 g and 250 mL weighs 258.9 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 103.6% 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 0.408% of a cup of tomato sauce, so weighing gets an accuracy no measuring cup can reach. A 500 g pack of it is 2.041 cups, and a 1 kg pack 4.082.
The condition this weight assumes: Plain passata or smooth sauce, not paste. Concentrated tomato paste is considerably heavier per cup because most of the water has been driven off, so the two are not interchangeable by volume.
The formula
millilitres- The amount of tomato sauce you are converting, in millilitres
1.03555444524- Grams per millilitre for tomato sauce, from its density of 1.0356 g/mL
grams- The equivalent quantity in grams
How it works, step by step
- Enter the quantity in millilitres.
- It is multiplied by 1.03555444524, the grams-per-millilitre figure for tomato sauce.
- 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 tomato sauce in grams
15 mL of tomato sauce weighs out at 15.5333 grams. Divide 15.5333 by 1.0355544 and you get back to 15 mL, which is the quickest check that the factor is the right way up.
100 mL of tomato sauce in grams
Take 100 mL of tomato sauce: 100 × 1.0355544 gives 103.555 grams. Doubling the batch takes it to 207.111 grams, because the relationship is a straight proportion once the density is known.
250 mL of tomato sauce in grams
Take 250 mL of tomato sauce: 250 × 1.0355544 gives 258.889 grams. Doubling the batch takes it to 517.777 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 tomato sauce?
One millilitre of tomato sauce is 1.0355544 grams. Half that quantity is 0.517777 grams and double it is 2.07111 grams, so the figure scales straight up and down — there is no offset in this conversion, only the factor.
Why is a cup of tomato sauce not 236 g like water?
Because weight per cup depends on what is in the cup. Tomato sauce has a density of 1.0356 g per mL where water has 1.00, so a cup of it weighs 245 g rather than 236.6 g. That is a difference of 8.4 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?
Barely. Tomato sauce does not compress, so a cup of it is 245 g however it is poured — within about 1%, which is inside the accuracy of a domestic scale. This is the group where measuring by volume is defensible.
Is a fluid ounce of tomato sauce 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 tomato sauce weighs 1.08 oz, so the two readings differ by 8.03%. 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 tomato sauce would weigh 258.89 g instead of 245 g — 13.9 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 tomato sauce is 1.036 g, and a scale reading to the nearest gram is working at 96.6% 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 tomato sauce is 500 g?
500 g of tomato sauce is 482.83 millilitres — 0.965666 millilitres to one gram, so 500 × 0.965666 = 482.83. Going that way is a division by 1.03555, or a multiplication by 0.965666 if you prefer.
Tomato sauce in millilitres and grams
| Millilitres | Grams | Unrounded |
|---|---|---|
| 5 mL | 5.17777 g | 5.177772226 |
| 10 mL | 10.3555 g | 10.35554445 |
| 15 mL | 15.5333 g | 15.53331668 |
| 30 mL | 31.0666 g | 31.06663336 |
| 50 mL | 51.7777 g | 51.77772226 |
| 100 mL | 103.555 g | 103.5554445 |
| 125 mL | 129.444 g | 129.4443057 |
| 150 mL | 155.333 g | 155.3331668 |
| 200 mL | 207.111 g | 207.110889 |
| 250 mL | 258.889 g | 258.8886113 |
| 500 mL | 517.777 g | 517.7772226 |
Based on 245 g per cup of tomato sauce. One millilitre of tomato sauce is 1.0355544 grams.
| Measure | Grams | Ounces | Millilitres |
|---|---|---|---|
| 1 cup | 245 g | 8.64 oz | 236.6 mL |
| 3/4 cup | 183.8 g | 6.48 oz | 177.4 mL |
| 2/3 cup | 163.3 g | 5.76 oz | 157.7 mL |
| 1/2 cup | 122.5 g | 4.32 oz | 118.3 mL |
| 1/3 cup | 81.67 g | 2.88 oz | 78.86 mL |
| 1/4 cup | 61.25 g | 2.16 oz | 59.15 mL |
| 1 tbsp | 15.31 g | 0.54 oz | 14.79 mL |
| 1 tsp | 5.104 g | 0.18 oz | 4.929 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) |
|---|---|---|---|
| Skim milk | 245 g | 8.642 oz | 1.036 |
| Buttermilk | 245 g | 8.642 oz | 1.036 |
| Plain yogurt | 245 g | 8.642 oz | 1.036 |
| Tomato sauce (this page) | 245 g | 8.642 oz | 1.036 |
| Orange juice | 248 g | 8.748 oz | 1.048 |
| Evaporated milk | 252 g | 8.889 oz | 1.065 |
| Peanut butter | 258 g | 9.101 oz | 1.091 |
Ordered by weight. The spread across this group is why a single generic cups-to-grams factor cannot work.