Unit Price: The Right Way to Compare Package Sizes
A lower shelf price may not be a better deal when quantities differ.
What it does and when to use it
Unit price normalizes packages to weight, volume, count, or length. It is useful only with the same unit and similar quality.
What information to enter
Enter total price and net quantity. Check membership discounts, drained weight, and actual count.
How to understand the result
A lower unit price signals lower quantity cost, but waste, shelf life, and quality can make a larger package worse.
Recommended step-by-step workflow
- Check the assumptionsUnit price normalizes packages to weight, volume, count, or length. It is useful only with the same unit and similar quality.
- Use matching unitsEnter total price and net quantity. Check membership discounts, drained weight, and actual count.
- Compare with another scenarioA lower unit price signals lower quantity cost, but waste, shelf life, and quality can make a larger package worse.
Short example
750 g for $18 is $2.40 per 100 g; 500 g for $13 is $2.60.
Common mistakes
- Comparing gross weight with drained weight.
- Buying a large pack that will be discarded before use.
Frequently Asked Questions
How are concentrates compared?
Compare cost per use or serving, not only bottle volume.
What about buy-one-get-one?
Divide the paid price by the total quantity received.
Are my personal inputs saved?
No. The calculators and guides are designed for quick browser use without storing your personal input values.