Skip to main content
CalcChef

Cooking Unit Price Calculator

Unit price for up to five groceries: price, quantity and unit give the cost per gram, per 100 g, per ml or per item, with the cheapest marked. How it works

Use the Cooking Unit Price Calculator

Changes only how the price is shown, not which item wins.

Best value
Give an item a name, a price and a quantity above zero to see its unit price

How It Works

Unit Price = Item Price / (Quantity × Unit Conversion Factor)

1 kg = 1000 g
1 oz = 28.35 g
1 lb = 453.59 g
1 L = 1000 ml
1 fl oz = 29.57 ml
1 cup = 236.59 ml

About the Cooking Unit Price Calculator

Unit price is the price divided by the quantity in a common unit: a 2 lb bag of flour at $3.49 is $3.49 ÷ 907.184 g = $0.003847 per gram, and a 5 kg bag at $8.99 is $0.001798 per gram, so the big bag costs 53.3% less per gram. The calculator takes up to five items in grams, kilograms, ounces, pounds, millilitres, litres, fluid ounces, US cups or a count, and marks the cheapest per unit.

Frequently asked questions

How do I work out price per 100 g?
Divide the price by the weight in grams and multiply by 100, or set Show unit price to per 100 g or 100 ml and the tool does it: the 2 lb flour bag at $0.003847/g reads $0.38/100 g, and the 5 kg bag at $0.001798/g reads $0.18/100 g. A $5.00 bag of 1 kg is $0.50/100 g.
Is the bigger package always cheaper?
No. A 16 fl oz bottle of olive oil at $4.99 is $0.0105 per ml and a 1 L bottle at $11.49 is $0.0115 per ml, so the smaller bottle is the better buy and the litre's row reads Best is 8.2% cheaper.
Can I compare a product sold by weight with one sold by volume?
Not fairly. The tool has no densities, so it cannot turn millilitres of honey or oil into grams. When you mix weight and volume it shows a note and picks a best value within each kind, so a volume row is compared only with other volume rows and a count row only with other count rows.
Are ounces weight or fluid ounces?
Both are in the list and they are different units. Ounces (oz) are weight, 28.3495 g; fluid ounces (fl oz) are volume, 29.5735 ml. Use whichever the package prints: net wt is weight, fl oz is volume.

Comparing package sizes at the shop

A 2 lb bag of flour at $3.49 works out to $0.003847/g and a 5 kg bag at $8.99 to $0.001798/g, so the 5 kg bag is marked Best and the small bag's row reads Best is 53.3% cheaper. Bigger is not always cheaper: a 16 fl oz bottle of olive oil at $4.99 is $0.0105/ml, while a 1 L bottle at $11.49 is $0.0115/ml, so here the small bottle wins and the litre's row reads Best is 8.2% cheaper.

Unit prices are shown per gram, per ml or per item. To match a shelf label that prints the price per 100 g, set Show unit price to per 100 g or 100 ml: the 2 lb flour bag then reads $0.38/100 g and the 5 kg bag $0.18/100 g. The setting changes only how prices are shown, not which item is Best. Name every row: one with a price and a quantity but no name is left out of the comparison. The list is saved in this browser until you press Clear Saved Items.

How unit prices are compared

unit price = price ÷ (quantity × unit factor)

Weights convert to grams (1 oz = 28.3495 g, 1 lb = 453.592 g, 1 kg = 1,000 g), volumes to millilitres (1 fl oz = 29.5735 mL, 1 US cup = 236.588 mL, 1 L = 1,000 mL), and counts stay as items. Unit prices of a cent or more show four decimals, smaller ones six. Each other row shows how much cheaper the best one is: (this unit price − best) ÷ this unit price.

A row counts only with a name and a price and quantity above zero. Mixing weight, volume and count brings a note, and the best value and the percentage are worked out within each kind, since the tool has no densities to turn millilitres of oil into grams. A kind with only one row has no best value and no percentage. Prices are read as dollars; tax, deposits and coupons are left out.

Related Tools

View all tools
Finance

Unit Price Compare Calculator

Unit price comparison: enter two prices and sizes to get each price per ounce, milliliter or item and see which is the better value.

Conversion

Cooking Measurement Converter

Convert cups, tbsp, tsp, fl oz and ml, grams and ounces, or turn a volume into grams for flour, sugar, butter, milk, oil, honey and water.

Conversion

Cooking Scale Converter

Scale a whole recipe by servings, or turn cups, spoons or mL of an ingredient into grams, ounces or eggs by King Arthur and USDA weights (1 cup flour = 120 g).

Finance

Discount Calculator

Discount calculator: sale price after a percent or amount off, the percent off between two prices, or the original price. A second discount can stack on top.

Conversion

Honey Weight to Volume Converter

1 cup of honey weighs 339 g (USDA). Convert honey between cups, tablespoons, teaspoons, mL or fl oz and grams, ounces or pounds, with an editable density.

Kitchen

Air Fryer Conversion Calculator

Convert oven times and temperatures to air fryer settings and back, in °F or °C, by a rule of thumb: 25°F (15°C) lower and 80% of the time, or the reverse.