Food Cost & Planning
Cost Per Gram and Cost Per Ounce Calculator
Compare package sizes and prices by cost per ounce, per 100 g, and per pound to find the best deal.
Measurement System PreferenceAuto-saved
Currently active across all 60 calculators: US Customary (cups, tbsp, oz, °F, in)
$
$0.750 /oz$2.65 /100 g$12.00 /lb
$
$0.625 /oz$2.20 /100 g$10.00 /lb
Best valueVerdict
Large bag is the best value, 16.7% cheaper per ounce than Small bag.
A bigger package only saves money if you use it before it goes stale or spoils.
How to use this calculator
- 1Enter each package's price and size (pick g, kg, oz, or lb).
- 2Add up to four packages to compare.
- 3The best value is highlighted, with its saving per ounce.
Tip: Shelf tags sometimes use different units for different sizes. This puts them all on the same basis.
How it's calculated
Unit Cost = Package Price ÷ Normalized Weight (Grams or Ounces)
We do the math at full precision and only round the final answer, so the numbers you see are as close as kitchen measurements allow. The assumptions and limits are listed alongside.
Worked example
Scenario: Option A: 16 oz coffee for $12.00 vs Option B: 32 oz coffee for $20.00.
InputsA: $12 / 16 oz = $0.75/oz; B: $20 / 32 oz = $0.625/oz
CalculationOption B saves $0.125 per ounce (-16.7% cheaper)
ResultOption B is $0.63/oz (16.7% cheaper than $0.75/oz)
Common questions
Is buying in bulk always cheaper?
Usually per ounce, but it's only a saving if you use it up. Ground spices lose flavor within about a year, and whole-grain flours can go rancid in a few months.