Price Per Kg Calculator

A 500 g pack of pasta costs 1.29 and a 1 kg pack costs 2.39 (any currency works). Per kilogram: 1.29 ÷ 0.5 = 2.58 per kg, and 2.39 ÷ 1 = 2.39 per kg.

The 1 kg pack is about 7% cheaper per kilo. The calculator opens with grams on the first product and kilograms on the second, so you can type these numbers straight in.

A 2 lb bag of rice costs $3.99, and a 1 kg bag of similar rice costs $4.49. 2 lb is about 0.907 kg, so the US bag costs $3.99 ÷ 0.907 ≈ $4.40 per kg — about 2% cheaper than the 1 kg bag. That is close enough that a coupon or a sale would decide it.

Price per kilogram is the standard unit in most metric countries for anything sold by weight: meat, cheese, fruit, vegetables, flour, pasta, rice and coffee. Use price per 100 g instead for small, pricey items such as spices, chocolate or tea, where per-kg numbers look huge.

Price per kg = price ÷ weight in kilograms. For grams, divide by 1,000 first: 750 g is 0.75 kg. So 3.60 for 750 g is 3.60 ÷ 0.75 = 4.80 per kg.

Package sizes are chosen by the manufacturer and are rarely round: 380 g, 450 g, 0.9 kg. Comparing shelf prices across those sizes tells you very little. The price per kilogram puts every pack on the same scale.

Shelf labels often show a unit price per kg or per 100 g, but neighboring products don’t always use the same reference unit, and promotional prices may not be included. A quick check with your own numbers settles it.

Imported goods are sometimes labeled in ounces or pounds. Pick the unit printed on each pack — the calculator converts everything and shows the result per kg, per 100 g, per lb or per oz. For small, pricey items the price per 100 g calculator is often easier to read.

The calculator opens with grams on the first product and kilograms on the second, and shows the result per kilo. Type the price and weight from each label; the result appears as soon as both are filled in. If your shop’s labels use 100 g, tap “per 100 g” — the cheaper product and the percentage never change, only the number shown.

For multipacks such as 4 × 125 g yogurts, tap + Multipack and enter 4 and 125 g. Canned food may list both a net weight and a drained weight; compare the same figure on both cans — usually the drained weight is what you actually eat.