Unit Price: 300 g vs 500 g — Best Value Per Gram
Compare the per-gram cost of a 300 g and 500 g product to identify which supermarket pack is the smarter buy.
How to use this tool
- Enter price a, weight a, price b and weight b in the fields above.
- Results update instantly as you type — or click Calculate.
- Read your cheaper option saves and the full breakdown beneath it.
Calculate and compare the unit price of two common grocery pack sizes to stop overpaying at the supermarket.
Frequently asked questions
- How do I compare unit prices?
- Divide each product's price by its weight in grams, then multiply by 100 to get the cost per 100g. The lower figure is better value.