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Examples, chart, and saved snapshots
Start with a realistic example, adjust the inputs, or save your numbers before experimenting.
Comparing two package sizes
Compare a smaller package with 750 units costing 8.49 against a larger package with 1,200 units costing 11.99.
Option A price: 25% lower
Change option a price to 6.368 while keeping the other example values the same.
Option A price: 25% higher
Change option a price to 10.613 while keeping the other example values the same.
Interactive chart
See what changes the result
This result is categorical, so compare the calculated values in the examples and snapshots instead.
The chart changes one input while holding all other current values steady. It is a sensitivity view, not a forecast.
Browser snapshots
Freeze these values
Save the current calculation, experiment freely, and restore it later.
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Compare snapshots
What changed?
Save one more snapshot to compare plans.
Saved only in this browser. Nothing is uploaded, and clearing browser data removes the snapshots.
Quick answer
What does the Unit price comparison calculate?
Which package is actually cheaper per unit? This calculator uses option a price, option a quantity, option b price, and option b quantity to estimate cheapest per unit immediately in your browser.
With the values currently entered, the result is Option B — is cheaper per unit. It also shows option a / unit, option b / unit, and unit-price saving.
How to use the Unit price comparison
- Replace the example values with your own numbers.
- Review the result and supporting figures as they update automatically.
- Check the formula and assumptions before using the estimate for a decision.
Inputs used
- Option A price
- Option A quantity — entered in units
- Option B price
- Option B quantity — entered in units
Unit price comparison formula
Price ÷ quantity for each option
Assumptions
- Both quantities use the same unit.
- Quality, waste, and expiry are not valued.
Practical guide
Unit price comparison example and edge cases
Package size makes prices hard to compare. Unit price puts both options on the same scale.
Example: Comparing two package sizes
Compare a smaller package with 750 units costing 8.49 against a larger package with 1,200 units costing 11.99.
- Option A price
- 8.49
- Option A quantity
- 750 units
- Option B price
- 11.99
- Option B quantity
- 1,200 units
Calculated resultOption Bis cheaper per unit
Choose the lower unit price only when you can use the larger package before it expires or becomes waste.
Example results use the default display profile. The calculator above follows your selected country and units.
How to read the result
- The sticker price can be higher while the unit price is lower.
- Compare equivalent units. Grams and kilograms work together only after you convert them to the same unit.
Edge cases worth checking
A coupon applies to one option
Subtract the coupon from that package price before comparing.
Some of the larger package will be wasted
Reduce its usable quantity. A cheap unit that goes in the bin is not a saving.
What changes the result most
Option A price
Use a current amount for option a price. Include fees or recurring costs that belong in the same figure.
Option A quantity
Use the count you expect in real life. Round up when a partial units cannot be purchased or used.
Option B price
Use a current amount for option b price. Include fees or recurring costs that belong in the same figure.
Try a different scenario
Small changes show whether the answer is stable or sensitive.
Option A price: 25% lower
6.368Option Ais cheaper per unit
Option A price: 25% higher
10.613Option Bis cheaper per unit
Option A quantity: 25% higher
938 unitsOption Ais cheaper per unit
Common mistakes
Check option a price
Both quantities use the same unit. Make sure this matches the number you enter.
Keep option b quantity consistent
Quality, waste, and expiry are not valued. Use the same units and time period throughout the calculation.
Do not rely on one unit price comparison scenario
Run a cautious case and an optimistic case. The range is often more useful than one exact-looking number.
Use this result well
Which package is actually cheaper per unit?
Check the receipt, package label, serving needs, and current local price before buying.