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Quantity Unit

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Sales Tax Rate (%)

Applied equally to all products

How many units do you need?

See total cost for your needed amount

Discount / Coupon (%)

Applied to all products before comparison

Comparison Results

Best Value

—

— per unit

All Products — Cost Per Unit

Quick Formula

Cost per unit = Total price ÷ Quantity
Savings vs. worst deal = (Worst unit cost − Best unit cost) × Your quantity needed
Tax and discount are applied to price before dividing.

Enter at least 2 products above and click Compare Prices to see which gives you the best deal.

Cost Per Unit — Visual Comparison

Price Share of Each Product

How to Use This Calculator

Enter the name, total price, and quantity of each product. The calculator divides price by quantity to find the cost per unit for each one. The product with the lowest cost per unit is highlighted as the best deal.

Use the same unit type for all products so the comparison is fair
Click Add Another Product to compare up to 6 items at once
Turn on Advanced Options to add a sales tax rate, a coupon discount, or the quantity you actually need — so you can see total spend side by side
Product names are optional, but they make results easier to read
Results update every time you click Compare Prices

Tip: store shelf labels often show different base units (per 100g vs per oz). This tool lets you enter the actual pack size for a truly equal comparison. If you need to find the cost for a single item on its own, try the unit price calculator.

Common Unit Conversion Reference

From	To	Multiply by
1 oz	grams	28.35
1 lb	grams	453.59
1 kg	grams	1,000
1 fl oz	ml	29.574
1 liter	ml	1,000
1 gallon	fl oz	128
1 pint	fl oz	16
1 yard	feet	3
1 meter	cm	100

Always use the same unit for all products. Convert first if packages show mixed units.

When Bigger Is Not Always Better

A larger pack often costs less per unit, but not always. Before buying in bulk, consider these points:

Expiry date — perishable items may go bad before you finish them
Storage space — large packs need more room at home
Cash flow — a higher upfront price ties up more money even if it saves in the long run
Quality differences — store brands may have a lower unit price but a different formula than name brands
Sale pricing — a smaller pack on sale can sometimes beat the regular bulk price; use a selling price calculator to check if a deal is genuinely below cost
Loyalty programs — some stores offer extra discounts on certain sizes through membership cards

Use the quantity you need field in Advanced Options to see your real total cost for each option.

Unit Pricing Laws Around the World

Many countries require stores to show the unit price on shelf labels, but the rules differ:

Country / Region	Unit Pricing Rules
🇺🇸 United States	Required in most states for food items. Rules vary by state.
🇪🇺 European Union	Mandatory for most pre-packaged food and household goods.
🇬🇧 United Kingdom	Required for food, drink, and some non-food items under the Price Marking Order.
🇦🇺 Australia	Required for most grocery items under Consumer Law.
🇨🇦 Canada	Not federally mandated; some provinces have rules.
🇮🇳 India	MRP (Maximum Retail Price) labeling required; unit pricing less common.

Even where unit prices are shown, they may use different base units across stores, making this calculator handy for cross-store comparisons. To work out what a product should sell for based on its cost, a retail price calculator can help.

Cost Per 100g by Total Price & Pack Size

How much you pay per 100 grams at different price and pack size combinations. Lower is better.

Pack Size	$1.00	$2.00	$3.00	$4.00	$5.00	$6.00

Formula: (Price ÷ Pack size in grams) × 100. Highlighted cells show the best deals at each price point.

Typical Supermarket Pack Size Ladder

Common product pack sizes and how unit cost usually scales across sizes. Values are illustrative examples.

Pack Size	Typical Price	Per 100g Cost	vs. Smallest	vs. Largest

Example based on a typical dry grocery product. Actual prices vary widely by category, brand, and retailer.

Monthly & Annual Cost by Unit Price

How much you spend per month and per year at different unit costs, assuming various daily usage amounts.

Unit Cost ($/unit)	10/day	25/day	50/day	100/day	200/day	Annual (100/day)

Monthly = unit cost × daily usage × 30. Annual = unit cost × 100 units/day × 365. Useful for coffee, protein powder, dog food, or any regularly consumed product.

Typical Unit Price Benchmarks by Product Category

Reference ranges for common products. Use these to judge if a price you see is average, cheap, or expensive.

Product Category	Common Unit	Budget Range	Mid Range	Premium Range
Chicken breast (fresh)	per 100g	$0.30–$0.55	$0.55–$0.85	$0.85–$1.50+
Whole milk	per 100ml	$0.06–$0.10	$0.10–$0.16	$0.16–$0.30+
Pasta (dry)	per 100g	$0.08–$0.14	$0.14–$0.25	$0.25–$0.70+
Ground coffee	per 100g	$0.60–$1.20	$1.20–$2.50	$2.50–$6.00+
Dish soap	per 100ml	$0.10–$0.20	$0.20–$0.35	$0.35–$0.60+
Toilet paper	per sheet	$0.01–$0.02	$0.02–$0.04	$0.04–$0.08+
Paper towels	per sheet	$0.01–$0.03	$0.03–$0.06	$0.06–$0.12+
Laundry detergent	per wash	$0.08–$0.15	$0.15–$0.30	$0.30–$0.55+
Vitamin C (tablets)	per tablet	$0.04–$0.08	$0.08–$0.18	$0.18–$0.50+
Bottled water	per 100ml	$0.01–$0.03	$0.03–$0.06	$0.06–$0.15+
Protein powder	per serving	$0.50–$1.00	$1.00–$2.00	$2.00–$4.00+
Cat / dog food (dry)	per 100g	$0.15–$0.30	$0.30–$0.60	$0.60–$1.50+

Ranges are approximate US market references and will vary by country, year, store format, and brand tier. Use as a rough guide only.

How a Discount Changes the Effective Unit Price

Starting unit prices after applying common coupon and sale discount percentages.

Original Unit Price	5% off	10% off	15% off	20% off	25% off	30% off	50% off

Effective unit price = original unit price × (1 − discount%). Use the Advanced Options section in the calculator above to apply a discount automatically.