When to use this calculator
Compare the resulting unit cost with a normal-price alternative, accounting for whether you will actually use every unit.
Explore the shopping & value calculators for other questions in this topic. For a related calculation, use the Reverse Discount Calculator: Recover the original price from a discounted price and discount rate.
PUTTING IT INTO PRACTICE
Multi Buy Unit Cost: a worked example
The values below are an illustrative example, not a recommendation. Replace them with measurements or assumptions that match your question.
| Input | Example value |
|---|---|
| Offer total price | 10 |
| Units received (integer) | 3 |
| Result | 3.333333 per unit |
- Check the input labels and enter the example values above.
- Apply the relationship: Effective unit cost = offer price/units received.
- The result is 3.333333 per unit, rounded for display.
How to interpret your result
All received units must be comparable, and the offer price should include mandatory charges.
Compare quantities on a common unit basis. Apply successive discounts to the reduced price each time. A low unit cost only creates value if the quantity is useful and additional purchase costs are considered.
Frequently asked questions
Can I simply add two discount percentages?
No. A second discount applies to an already reduced price, so the remaining-price factors must be multiplied.
When is the multi buy unit cost calculator useful?
Compare the resulting unit cost with a normal-price alternative, accounting for whether you will actually use every unit.
How do I use the multi buy unit cost calculator?
Enter offer total price, units received (integer). The result updates automatically. Use the units shown beside each input; the example values illustrate the method.
Which formula does this calculator use?
Effective unit cost = offer price/units received.
What should I check before using the result?
All received units must be comparable, and the offer price should include mandatory charges.
How are results rounded?
Scalar numbers display up to six decimal places, with scientific notation for very large or small values. Text, fraction, date and schedule outputs use the format described on the tool. Intermediate calculations use JavaScript floating-point arithmetic. Keep sensible precision for your measurements.
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