Is the weight of a 1-litre of water in a plastic bottle = to 1 kg?

How much does water weigh?

The weight of water varies depending upon the temperature at which it is being stored. To give a simple explanation, hotter water weighs less, and colder water weighs more (because it's more dense). In order to accurately convert a volume of water to a weight, a density figure is therefore required.

At room temperature (70°F / 21°C), the density of water is 0.99802 g/ml. This means that for a US gallon of water at room temperature, the weight would be around 8.33 pounds. How much does a gallon of water weigh?

To calculate the weight of any other liquids, give our gallons to pounds converter a try.


Effects of Water Temperature on Weight

Temperature is a key factor to dictate the weight of water in a specified volume. We all know that temperature is actually the measure of energy that water molecules possess.

Thus when temperature increases the molecules start vibrating with higher energy, pushing their neighbor on side. This results in lesser molecules in a specific volume; which is in turn density of that solution.

Keeping this in view we know

  • Warm water will have lesser molecules in specific volume
  • Cold water will have more molecules in specific volume

Gallon is nothing but a specific volume. So a gallon filled with warm water, thus containing lesser molecules of water, will weigh less. In contrast, a gallon filled with cold water will weigh more. For example, a gallon of water weighs about 8.34 at 17 degree centigrade while at 1000 degree centigrade it weighs around 8.05.

Hence, a gallon will weigh more when it is filled with colder fluid.

Global sales

Global bottled water sales have increased dramatically over the past several decades, reaching a valuation of around $60 billion and a volume of more than 115,000,000 cubic metres (3.0×1010 US gal) in 2006.[25] U.S. sales reached around 30 billion bottles of water in 2008, a slight drop from 2007 levels [26]

The rate of consumption more than quadrupled between 1990 and 2005.[27] Spring water and purified tap water are currently the leading global sellers. By one estimate, approximately 50 billion bottles of H2O are consumed per year in the U.S. and around 200 billion bottles globally.[28]

The Temperature Affects the Weight of Water

As we mentioned briefly above, temperature has an effect on the density of water, and thus its precise weight will vary with the temperature. As the temperature of water rises, it expands, causing it to increase in volume slightly.[1]

At a molecular level, as the temperature rises, the heat of the water molecules increases, which increases their energy. As the energy in the molecules rises, the particles within move and vibrate more, causing them to take up more space.

Thus, the warmer the water is, the more volume it will consume, and the lower its density will be. The chart below shows the density of water at various temperatures, according to the US Department of the Interior.[2]

Density of Water at Various Temperatures

Density of water at different temperatures
Temperature( °F / °C ) Density( grams per cm3 )
32° / 0° 0.99987 g/cm3
39.2°/4.0° 1.00000 g/cm3
40°/4.4° 0.99999 g/cm3
50°/10° 0.99975 g/cm3
60°/15.6° 0.99907 g/cm3
70°/21° 0.99802 g/cm3
80°/26.7° 0.99669 g/cm3
90°/32.2° 0.99510 g/cm3
100°/37.8° 0.99318 g/cm3
120°/48.9° 0.98870 g/cm3
140°/60° 0.98338 g/cm3
160°/71.1° 0.97729 g/cm3
180°/82.2° 0.97056 g/cm3
200°/93.3° 0.96333 g/cm3
212°/100° 0.95865 g/cm3

Giotto Large 1 Gallon Motivational Water Bottle with Paracord Handle and Removable Straw

Giotto Large Motivational Water Bottle with Paracord Handle & Removable Straw – Leakproof Tritan BPA Free Fitness Sports Water Jug with Time Marker to Ensure You Drink Enough Water Daily 【Motivational Quote & Time Marker】With unique inspirational quote and time markers,this water bottle is great for measuring your daily intake of water,reminding you stay hydrated and drink enough water throughout the day.A must have for any fitness goals including weight loss,appetite control and overall health.【Distinct Carry Design】Designed with detachable paracord handle, which is made of the highest quality ropes, makes this 128 oz water bottle comfortable and fashionable to carry around. When disassembled, the Paracord handle can be used as a rope that can be stretched for 10-15 feet. With anti skid grip design also give you another option to carry it in different occasions. Check price on Amazon

Stay hydrated at all time with GIOTTO’s innovative and easy to use water bottle!

Some individuals find it easier to say than do to drink enough water, and these water bottles are here to assist. Having a water bottle at your desk or in your workout bag is one thing; remembering to refill it on a regular basis is quite another. One useful strategy is to use time-labeled water bottles, which allow you to monitor how much water you’re really consuming over time and when it’s time to get a refill. And Giotto’s unique water bottles with removable strap and timer are precisely what you need! The sizes can be selected upon your needs.

As the manufacturers say GIOTTO’s water bottles are designed intuitively

This ergonomically designed sports water bottle with lid has a range of distinctive and useful characteristics, such as a one-click push button for quicker opening, a specific mouth design for improved water flow, and a strap to carry it with you at all times. But the most distinctive feature that distinguishes these sports water bottle for men and women as a one-of-a-kind piece of fitness equipment is the innovative time marker, which allows you to keep track of how frequently you drink water and is an excellent way to maintain your body’s ideal hydration levels.

Materials and construction of the highest quality

These water bottles with timers are constructed from the highest grade Eastman Tritan, BPA, and toxin-free co-polyester, guaranteeing that your water is free of harmful chemicals, smells, and plastic taste. They are quite easy to use and maintain and can be adjusted to fit your needs. They make a perfect gift for anybody as well.

Item Features:

This water bottle has one of the best designs among all the other models. This is a leakproof tritan BPA free water jug great for gym activities that can be used outside of the gym in your daily life as well. What makes it so special is its design that consists of beautiful, sleek, modern shape of the bottle, variety of colors you can choose from. Motivational quotes and a timer pained directly onto the water bottle that remind you when you should take a sip and motivate you to do so.

This water bottle, with its unique inspiring phrase and time markers, is ideal for tracking your daily water consumption and encouraging you to keep hydrated and drink enough water throughout the day. A must-have for anybody pursuing fitness objectives such as weight loss, hunger control, and general wellness.

This 128 oz water bottle is designed with a removable paracord handle made of the best quality ropes, making it comfortable and fashionable to carry about. When the Paracord handle is dismantled, it may be used as a rope that can be stretched for 10-15 feet. The anti-slip grip design gives you another choice for carrying it in different situations.

Another great thing about this water bottle is its large capacity of 1 gallon of water. For most people this is more than enough to last a session inside the gym and two uses of the full bottle can cover the entire water intake for the day. The large 128 OZ capacity means that you may enjoy one full water jug without having to constantly refill it. The measuring scale allows you to quickly and clearly verify the exact volume of water consumed. Running, hiking, cycling, vacation, and other outdoor activities are all possible with just one fill of this water bottle.

Finally, the major feature of this model is its removable straw

You can drink your water with or without the straw if that’s what you prefer. This feature was actually made with gym goers and those who will use the bottle during various sport activities. When you are doing energy consuming and sweat inducing activities such as high intensity training, cycling, running and such make sure to make your gulps bigger. Bigger gulps are possible only when you remove the straw and drink directly from the bottle. Otherwise stick to little sips every hour or so.

Important feature of this model is that it is vegan!

With a BPA-Free and easy-to-use design this water bottle is made of excellent food grade eco-friendly reusable tritan plastic and is 100 percent BPA and toxin free. As well as odor free, and healthful for your everyday water consumption. This is great because even those sticking to strict vegan lifestyle can enjoy drinking from this water bottle and in case you decide to gift it to somebody, you can include your vegan friends in the list of potential receivers as well.

The dust-free cap with a seal ring makes it completely leakproof. You can enjoy spill-free drinking with only one detachable straw. It may also be used as a dual-purpose water bottle without the straw. The wide-mouth aperture is simple to use.

This water bottle can be a great gift for your friends and loved ones

It comes in a range of colorful hues and is great for keeping your loved ones hydrated and healthy!

NOTE: Try not to drop it on hard materials. Do not wash it with a dishwasher, use your hands, baking soda or vinegar to thoroughly clean it out after each use.

Types of bottled water

The FDA has established “Standards of Identity” for bottled water products sold in the U.S. For a product to be considered “bottled water”, it cannot contain sweeteners or chemical additives (other than flavors, extracts or essences) and must be calorie-free and sugar-free. If flavors, extracts and essences—derived from spice or fruit—are added to the water, these additions must comprise less than 1% by weight of the final product.[20]

Some of the more common types of bottled water are listed below:[21] [22]

  • Artesian water

This is water that originates from a confined aquifer that has been tapped and in which the water level stands at some height above the top of the aquifer.

  • Fluoridated

This type of water contains fluoride added within the limitations established in the FDA Code of Federal Regulations. This category includes water classified as “For Infants” or “Nursery.”

  • Groundwater

This type of water is from an underground source that is under a pressure equal to or greater than atmospheric pressure.

  • Mineral water

Mineral water contains at least 250 parts per million total dissolved solids (TDS). It comes from a source tapped at one or more bore holes or spring, and originates from a geologically and physically protected underground water source. No minerals may be added to this water.

  • Purified water

This type of water has been produced by distillation, deionization, reverse osmosis, or other suitable processes. Purified water may also be referred to as “demineralized water”. It meets the definition of “purified water” in the United States Pharmacopoeia.

  • Sparkling water

Sparkling water contains the same amount of carbon dioxide that it had at emergence from the source. The carbon dioxide may be removed and replenished after treatment.

  • Spring water

This type of water comes from an underground formation from which water flows naturally to the Earth’s surface.

  • Sterile water

This type of water meets the requirements under “sterility tests” in the United States Pharmacopoeia.

  • Well water

Well water is taken from a hole tapping, etc. This hole may be bored, drilled, or otherwise constructed in the ground. [23]

How Much Does a 5 Gallon Jug Of Water Weigh?

Drinking water usually comes in the form of jugs or 5 gallon water bottles. In the US 5 gallons jug weighs 41.64 lb or 18.89 kg. While in the UK, 5 gallons jug weighs 50 lb or 22.67 kg.

                       Weight in pounds and kgs of gallons of water Gallons of water        US standard system           UK imperial gallon Pounds Kg  Pounds Kg 1 gallon 8.32 3.78 10 4.55 2 gallons 16.64 7.56 20 9.1 3 gallons 24.96 11.34 30 13.65 4 gallons 33.28 15.12 40 18.2 5 gallons 41.6 18.9 50 22.75 6 gallons 49.92 22.68 60 27.3 7 gallons 58.24 26.46 70 31.85 8 gallons 66.56 30.24 80 36.4 9 gallons 74.88 34.02 90 40.95 10 gallons 83.2 37.8 100 45.5



Converting the volume according to the local standard is sometimes necessary for us to do. People outside the U.S. are mostly familiar with the metric system. But it is always good to know the way to convert the volume following the measurement of the other popular widely accepted standards. Now you know exactly how many water bottles is a gallon, no matter where you are when asked the question. The main thing is to keep it mind to have your daily water intake.

Furthermore, we have reviewed some water bottles that you can carry around to keep yourself hydrated. After all, water consumption is a vital part of maintaining one’s health and well being. Make sure to drink your water and in case of any questions, recommendations or further inquiries drop a comment down in the comment section. We will be glad to hear from you.