Volume to Weight Converter by Material Density

Volume to Weight Converter

Convert any volume into weight (or weight back into volume) using real material density. Pick water, milk, oil, honey, flour, sugar, sand, gravel, concrete, fuel, or enter a custom density in g/mL.

🧪Real Material Presets

📝Conversion Inputs

Conversion direction

Material

Volume amount

Used when converting volume to weight.

Volume unit

Weight amount

Used when converting weight to volume.

Weight unit

Custom density (g/mL)

Active only when Material is set to Custom.

Decimal places

Weight in kilograms 0 kg mass in SI units

Weight in pounds 0 lb imperial equivalent

Density used 0 g/mL

Volume in liters 0 L converted to SI

🔢The Core Formula

mMass (weight)

VVolume in liters

ρDensity g/mL

1 LWater = 1 kg

📊Material Density Reference

Material	Density (g/mL)	Density (kg/m³)	Type	Weight of 1 L
Gasoline	0.745	745	Fuel	0.745 kg
Ethanol	0.789	789	Alcohol	0.789 kg
Olive oil	0.918	918	Cooking oil	0.918 kg
Water	1.000	1000	Liquid	1.000 kg
Milk, whole	1.030	1030	Dairy	1.030 kg
Table salt	1.220	1220	Dry solid	1.220 kg
Honey	1.420	1420	Syrup	1.420 kg
Sand, dry	1.600	1600	Aggregate	1.600 kg
Gravel	1.680	1680	Aggregate	1.680 kg
Concrete	2.400	2400	Building mix	2.400 kg
Mercury	13.530	13530	Metal, liquid	13.530 kg

🥄Cooking Ingredient Cup Weights

Ingredient	Density (g/mL)	1 Cup (236.6 mL)	1 Tbsp (14.79 mL)	1 Tsp (4.929 mL)
Water	1.00	236.6 g	14.8 g	4.9 g
Milk, whole	1.03	243.7 g	15.2 g	5.1 g
Olive oil	0.918	217.2 g	13.6 g	4.5 g
Honey	1.42	335.9 g	21.0 g	7.0 g
Flour, all-purpose	0.53	125.4 g	7.8 g	2.6 g
Granulated sugar	0.85	201.1 g	12.6 g	4.2 g
Table salt	1.22	288.7 g	18.0 g	6.0 g

📏Volume Unit to Milliliter Chart

Unit	Milliliters	Liters	Water Weight	Notes
Teaspoon (tsp)	4.929 mL	0.00493 L	4.93 g	US customary
Tablespoon (tbsp)	14.787 mL	0.01479 L	14.79 g	3 tsp
Fluid ounce (fl oz)	29.574 mL	0.02957 L	29.57 g	2 tbsp
Cup	236.588 mL	0.23659 L	236.6 g	8 fl oz
Pint, US	473.176 mL	0.47318 L	473.2 g	2 cups
Quart, US	946.353 mL	0.94635 L	946.4 g	2 pints
Gallon, US	3785.41 mL	3.78541 L	3785.4 g	4 quarts
Cubic meter	1000000 mL	1000 L	1000 kg	SI volume

🗂Weight Comparison Grid

Material	Density (g/mL)	1 L Weighs	1 Cup Weighs	1 Gallon Weighs	1 Gallon (lb)
Gasoline	0.745	0.745 kg	176.3 g	2820 g	6.22 lb
Olive oil	0.918	0.918 kg	217.2 g	3475 g	7.66 lb
Water	1.000	1.000 kg	236.6 g	3785 g	8.35 lb
Milk, whole	1.030	1.030 kg	243.7 g	3899 g	8.60 lb
Honey	1.420	1.420 kg	335.9 g	5375 g	11.85 lb
Sand, dry	1.600	1.600 kg	378.5 g	6057 g	13.35 lb
Gravel	1.680	1.680 kg	397.5 g	6359 g	14.02 lb
Concrete	2.400	2.400 kg	567.8 g	9085 g	20.03 lb

⚙Full Formula Breakdown

Convert volumeFirst convert the entered volume into liters. For example, 1 cup = 236.6 mL = 0.2366 L and 1 gallon = 3785.4 mL = 3.7854 L.

Mass equationmass_kg = volume_L × density_g_per_mL. Because 1 L holds 1000 mL and density is per mL, the 1000 factors cancel and grams become kilograms.

Water checkWater density is 1.00 g/mL, so 1 L of water = 1.000 kg and 1 cup of water = 236.6 g. This is the anchor value for the tool.

To poundsConvert kilograms to pounds by dividing grams by 453.592, or multiply kilograms by 2.20462. 1 gallon of gasoline ≈ 2820 g ≈ 6.22 lb.

Reverse modeWeight → Volume rearranges to volume_L = mass_kg / density_g_per_mL, then converts liters back into the chosen volume unit.

Cubic meter1 m³ equals 1000 L, so 1 m³ of water weighs 1000 kg and 1 m³ of dry sand weighs about 1600 kg.

💡Accuracy Tips

Density shifts: Density changes with temperature and, for powders like flour or sand, with how tightly the material is packed. Loose scoops weigh less than compacted ones, so treat these figures as typical averages.

Weigh your flour: A cup of flour can range from 120 g to 145 g depending on scooping and sifting. For baking accuracy, weigh flour on a scale instead of measuring it by cup volume.

You’re baking a cake, and there’s one cup of flour required by the recipe. You pour it from the bag into the bowl. Afterward, when your cake comes out dense compared to your neighbor’s, it’s not because your oven is different, or because you did something wrong. It’s because density matter. Volume does not always equal weight.

Physics says this daily, but most of us take it as an article of faith that they does. Under standard conditions, water has the handy property of weighing exactly one kilogram per liter. This means that a shipping label can simply note “10 Liters” to mean 10 kilograms; similarly, kitchen scales use this convenient fact as their basis. But change the substance and suddenly the tidy one-to-one no longer hold true.

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Why Volume Is Not Weight

Density, on the other hand, is just a measurement of how tightly molecules in any particular amount of space are bunched up. Honey contains thick sugars, which crowd together far more densly than do the airy particles in all-purpose flour when they’re both poured into a cup. Though the containers remain the same, a heaping cup of honey weighs about 336 grams; the same amount of flour may only be 125. What’s in the container changes everything, whether you’re talking about building materials or dry goods.

The conversion tool above accounts for this variable. You can select from one of many materials (as seen in the image below), which allows it to determine your input value. If you simply type a value in as “volume”, that won’t do. You need to specify volume of what. There are some common ones for home use: olive oil, milk, etc., but it goes all the way up to heavy aggregates such as concrete and even sand. The density coefficient is applied different, so how it does the math entirely depends upon the density coefficient used.