Price Per Kilogram Calculator

Work out price per kilogram instantly with clear inputs, formula shown and shareable results.

About Price Per Kilogram Calculator

Unit pricing removes the effect of package size: price divided by weight, scaled to a kilogram. It is the only reliable way to compare packages, because shrinking the pack while holding the price is the most common form of hidden price rise.

Formula

Unit price

price per kg = package price / weight (g) x 1000

Worked example

With the default values below, Price Per Kilogram Calculator returns Price per kilogram of $8.56. Change any input above and every figure here is recalculated in your browser.

Inputs used

Package price: 3.85
Package weight: 450 g
Comparison package price: 6.2
Comparison weight: 800 g

Results

Price per kilogram: $8.56
Comparison price per kilogram: $7.75
Saving per kilogram with the cheaper one: $0.81
Better value: The comparison package is better value

Step by step

1Values used
2Unit price
3Price per kilogram= 8.56
4Comparison price per kilogram= 7.75
5Saving per kilogram with the cheaper one= 0.81
6Better value= The comparison package is better value

Assumptions and limits

The result is derived only from the 4 inputs listed above. Anything not among them is not part of the calculation.
In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
Figures are rounded for display to 2 decimal places, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Frequently Asked Questions

Is the bigger pack always cheaper per kilogram?

No. Promotions on small packs and premium pricing on family sizes both break the assumption, which is why the shelf unit price is worth reading.

What about waste?

Include it. A larger pack at a lower unit price is no bargain if a third goes off before you use it.