Unit Price Basics
Calculate the unit price of different pack sizes by dividing total price by quantity — and use that number to identify which option gives the most value per unit of money.
In this lesson
Unit Price Basics is part of Comparing Value Properly. This preview shows how value-comparison connects to everyday family decisions such as earning, saving, spending choices, goals, approvals, or parent-guided money conversations inside Progress Penguin.
Think about this money choice
Kemi sees rice sold in a 500g bag for 400 in local currency and a 1kg bag for 700 in local currency.
How it works
Unit price is the cost per single unit of measurement — per gram, per ml, per piece. To calculate it, divide the total price by the total quantity. Comparing unit prices across different pack sizes tells you which option gives more value per unit of money spent — regardless of the total price.
Try a real-life example
Real-life money moment: Kemi sees rice in a 500g bag for 400 in local currency and a 1kg bag for 700 in local currency. Unit price: 500g bag = 400 in local currency ÷ 500 = 0.80 in local currency/g. 1kg bag = 700 in local currency ÷ 1000 = 0.70 in local currency/g. The larger bag is 0.10 in local currency cheaper per gram. Over a month of regular purchases, that difference adds up.
Activity preview
Match the money ideas
Use what you learned to complete this short challenge.
Practice funding your spending account
Open Requests and make a deposit request so you can see how money gets added before spending. Parent approval can happen later.
Quiz preview
Unit Price Basics means:
500ml of juice costs 600 in local currency and 1L costs 1000 in local currency. The better unit price is: