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Sometimes it’s hard to tell if a bigger package is really a better value when you’re shopping for items at a store. Fortunately, checking the item’s unit price can help you figure out which package provides the most product for the cost. The unit price is the cost per quantity of item you’re receiving. The quantity might be per item or per unit of measurement, such as ounces, grams, gallons, or liters. To calculate the unit price, simply divide the cost of the product by the quantity you’re receiving or check the store’s shelf label. Then, compare the unit prices of 2 or more packages of the same product to see which is the better value.
Steps
Method 1
Method 1 of 2:Calculating Unit Price

1Check the item’s total price. The unit price is typically a fraction of the total cost of the product. Look at the price tag or use a price scanning tool to find the total price of the product.^{[1] X Research source }
 If you have a coupon, subtract the coupon value from the total price before you calculate the unit price.

2Find the quantity of the item that the package contains. Look on the label to check the amount of product in the container. The quantity is normally listed on the bottom right corner of the package.^{[2] X Research source }
 Some products will be sold by item, such as toilet paper, paper towels, or pencils. However, most items will have a unit of measurement, like ounces, cups, quarts, gallons, milliliters, liters, etc.
Tip: If the product is priced by item or unit, then the unit price will be the cost of the item. For instance, if you’re looking at watermelons that are $3.98 per melon, then the unit price is $3.98. Similarly, if you were purchasing a single roll of paper towels for $1.50, that’s the unit price.
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3Make sure both products have the same unit of measurement. Sometimes the products you’re comparing measure their quantity using different units, such as quarts versus gallons or ounces versus grams. If this is the case, change the unit of measurement for one of the products to match the other before you calculate the unit rate.^{[3] X Research source }
 For example, let’s say you’re looking at a quart of milk for $1.25 and a gallon of milk for $4.29. There are 4 quarts in a gallon, so you could adjust the price for the quart of milk by multiplying it by 4. To purchase a gallon of milk in individual quartsize bottles, you’d pay $1.25 x 4, which is $5.00.
 Similarly, let’s say you’re looking at a liter of vegetable oil for $9.79 and a 12 oz bottle for $4.99. One liter contains 33.8 ounces, so you can use that number as your quantity.

4Divide the total price by the quantity to get the unit price. Use your calculator or phone to find the unit price. If you're doing the math by hand, use long division to divide the total price by the quantity. Here are some examples:^{[4] X Research source }
 Let’s say the product is a 6roll pack of toilet paper for $4.59. To get the unit price, you’d divide $4.59 by 6 to get $0.77. The unit price is $0.77.
 Similarly, you might be considering a 24 oz bottle of shampoo for $13.79. Divide $13.79 by 24, which is $0.57.
Variation: Use an online unit price calculator for an easier option. These calculators allow you to enter the item information, then they generate the unit cost. You can find a unit price calculator here: https://www.calculatorsoup.com/calculators/math/unitratecalculator.php

5Look for the unit cost on the product label for an easier option. Most stores include the product’s unit price on the shelf label for that product. Typically, the unit price is printed in small type in the top or lower left corner and may have a box around it. Check the shelf label to see if the unit price is there.^{[5] X Research source }
 As an example, when you’re looking at an 8 oz bottle of olive oil that costs $5.79, you might see a unit price of $0.72 printed in small type in the corner of the label.
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Method 2
Method 2 of 2:Comparing Unit Prices

1Calculate the unit price of the items you’re planning to buy. Divide the total cost of each product by the quantity in the package. Get the unit price for each item.^{[6] X Research source }
 For instance, let’s say you’re trying to choose between a 6roll pack of toilet paper for $4.59 and a 9roll pack of toilet paper for $7.29. To get the unit prices, calculate $4.59/6 = $0.77 and $7.29/9 = $0.81.
 Alternatively, you might be trying to choose between a 32oz familysized box of cereal for $4.89 and a 12oz regularsized box of cereal for $2.29. You’d calculate $4.89/32 = $0.15 and $2.29/12 = $0.19.

2Choose the item with the lowest unit price. Generally, the product with the lowest unit cost is the best value. Compare the unit prices that you calculated to see which one is lower. Then, purchase that product.^{[7] X Research source }
 As an example, if a 6roll pack of toilet paper has a unit price of $0.77 and the 9roll pack has a unit price of $0.81, the 6roll pack is the best choice.
 Alternatively, a familysized box of cereal is a better deal at a unit price of $0.15 versus a smaller box at a unit price of $0.19.

3Make sure that the quality of the items is similar, if that matters to you. Typically, items that are of lesser quality will have a lower unit cost. You might still choose to purchase the less expensive item. However, consider the quality of the items when making a final purchasing decision.^{[8] X Research source }
 For example, a toilet paper that has a thicker ply or more sheets may have a higher unit cost than singleply toilet paper with a low sheet count. In this case, you might decide that the higherquality toilet paper is a better value for you.
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Community Q&A

QuestionHow do you find the total cost for one item from its unit cost?Community AnswerThe unit cost x quantity = total cost. For example: 24 oz soup at $0.10 ounce is 24 x $0.10 = $2.40.

QuestionHow do I find the unit price of biscuits?Community AnswerLook at the packaging and find how many biscuits there are per package. Then, divide the cost over the quantity. For example, 24 biscuits at $2.40 would be $0.10 per biscuit.

QuestionWhen two people are participating in a buy one get one of equal or lesser value free promotion, which cost is split, the higher priced item or the lower priced item?Community AnswerThe higher priced item is always the one that you pay for  the lower priced item is the one that you get for free. So I'd say you split the cost of the higher priced item.

QuestionI need to know, if 2500 bundles of vials is 440000 rupees, then how much for one bundle? If 2244 bundles sells for 36500 rupees, then what is the price for one bundle?Community AnswerIn the first example, 1 bundle = 176 rupees (440000/2500). In the second example, 1 bundle = 16.26 rupees (36500/2244).

QuestionWhat do I do if there is no C?Community AnswerAsk a store associate. He or she should be able to find it from the inventory list details.

QuestionIf a 10oz box of cereal costs $2.20, what does an 8oz box cost?Community AnswerIf you divide 2.20 by 10, you get 22c per oz, meaning that 8oz is 8 x 22 = $1.76.

QuestionHow do I calculate if 3.25 per quart is cheaper than 6.50 per gallon?Community AnswerOne gallon is equal to 4 quarts. Just multiply the price per quart by 4 to obtain the gallon price (13).

QuestionWhat is the equation to calculate price per unit?Community AnswerPrice per unit is the price of an item divided by the number of units of that item in a package. So, let P be price of the whole package and U be units. Price per unit = P/U. Note that a unit can be any measurement of mass, length, or volume. Alternately, in some packaged items, a unit is just one of that item.

QuestionWhat is the cost of 128 oz if 5.5 oz costs .77?Community Answer128 X .77 98.56  =  = 17.92 5.5 5.5

QuestionHow can I figure out cost per item?Community AnswerYou can figure the cost per item by subtracting the price of the food all together from the amount you pay.
Tips
 It’s best to compare unit prices on products that are of a comparable quality. Otherwise, it may be difficult to recognize which product will actually be the best value.Thanks!
References
 ↑ https://www.mathsisfun.com/measure/unitprice.html
 ↑ https://www.mathsisfun.com/measure/unitprice.html
 ↑ https://www.calculatorsoup.com/calculators/math/unitratecalculator.php
 ↑ https://www.mathsisfun.com/measure/unitprice.html
 ↑ https://www.priceperpiece.com/
 ↑ https://www.mathsisfun.com/measure/unitprice.html
 ↑ https://www.mathsisfun.com/measure/unitprice.html
 ↑ https://www.mathsisfun.com/measure/unitprice.html