Method
How to calculate absolute price difference per unit
Both quantities must represent the same unit. The calculator compares per-unit prices and reports the relative saving against the more expensive option.
FORMULAUnit price = package price ÷ package quantity
Worked example
Unit-price comparison calculator example
$8.99 for 500 g costs about $0.018/g; $14.99 for 1,000 g costs about $0.015/g.
Change one assumption at a time to see what drives the result. The output is an estimate, not a quote, forecast or recommendation.
FAQ
Unit-price comparison calculator FAQ
Can I compare different units?
Convert both quantities to the same unit before entering them.
Does the lower unit price always mean better value?
No. Quality, waste, expiry and the quantity you can use remain outside the calculation.
How is percentage saving calculated?
The unit-price difference is divided by the higher unit price.