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Unit Cost Calculator

Calculate the cost per item, weight, length, area or volume to compare products more easily.

Your Details

Overview

A unit cost calculator helps you work out how much something costs per item, per kilogram, per litre or another unit so you can compare products more fairly. Enter the total price, the quantity included, and a comparison quantity to see the effective price per unit.

How it works

The calculator divides the total price by the quantity to find the cost for one unit. It then multiplies that result by your chosen comparison quantity so you can compare products using a consistent amount.

How to use this calculator

  1. 1Enter the total price of the product or pack.
  2. 2Add the full quantity included in that price.
  3. 3Select the unit type you are comparing.
  4. 4Enter a comparison quantity such as 1 item, 100 g or 1 litre.
  5. 5Review the cost per unit and comparison cost.

Example Calculation

Total Price

$4

Quantity

2

Unit Type

kg

Compare Quantity

1

Cost Per Unit

$1.8000

If a 2 kg bag costs 3.60, the cost per kilogram is 1.80, so the comparison cost for 1 kg is 1.80.

Frequently asked questions

What does a unit cost calculator estimate?

It estimates the price per single unit of quantity, such as per item, per kilogram, per litre or per metre.

Why is unit cost useful?

Unit cost helps you compare different pack sizes and prices on a like-for-like basis to see which option offers better value.

Can I use this calculator for weight, volume and length?

Yes. You can use it for many types of quantity as long as the total price and quantity use the same basis.

What should I enter as the comparison quantity?

Enter the amount you want to compare against, such as 1 kg, 100 g, 1 litre or 1 item.

Does this calculator include discounts or taxes?

Only if they are already reflected in the total price you enter.

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Assumptions and warnings

Assumptions

  • The total price and quantity relate to the same product or pack.
  • The calculation assumes the unit price is constant across the full quantity.
  • Taxes, discounts and delivery charges are only included if they are part of the total price entered.