Unit Price Calculator
Compare which pack size is genuinely cheaper.
Enter your values
Enter the product a price in $.
Enter the product a size in g.
Enter the product b price in $.
Enter the product b size in g.
Results update instantly as you type — no submit needed. Your values are remembered on this device, and the shareable link reopens the calculator with exactly these numbers.
- Product A unit price
- $0.01398 per unit
- Product B unit price
- $0.01277 per unit
- Better value
- Product B
- Saving
- 8.68%
- Cost of 1,000 units at best price
- $12.77
Quick answer
Unit price is total price divided by quantity — the only reliable way to compare different pack sizes.
Unit price = price ÷ quantity
At a glance
| What it does | Compare which pack size is genuinely cheaper. |
|---|---|
| Category | Everyday |
| Inputs needed | Product A price, Product A size, Product B price, Product B size |
| Main output | Product A unit price |
| Formula | Unit price = price ÷ quantity |
| Cost | Free — no sign-up, no download |
How to use the Unit Price Calculator
- 1Enter each product's price.
- 2Enter each pack size in the same unit.
- 3Read which one is genuinely cheaper.
Inputs explained
- Product A price($)
- Enter the product a price in $.
- Product A size(g)
- Enter the product a size in g.
- Product B price($)
- Enter the product b price in $.
- Product B size(g)
- Enter the product b size in g.
Worked example
Using the values the calculator loads with:
Inputs
- Product A price6.99 $
- Product A size500 g
- Product B price11.49 $
- Product B size900 g
Results
- Product A unit price$0.01398 per unit
- Product B unit price$0.01277 per unit
- Better valueProduct B
- Saving8.68%
- Cost of 1,000 units at best price$12.77
Frequently asked questions
Is bigger always cheaper?
No. Roughly one in five 'value' packs costs more per unit than the standard size, especially on promotion.
Do the units need to match?
Yes — convert both to the same unit (grams, ml, sheets) before comparing.
What do I need to enter into the Unit Price Calculator?
Just 4 values: product a price, product a size, product b price, product b size. Every field starts with a realistic example, so you can change one number at a time and watch the result update instantly.
How does the Unit Price Calculator work out the answer?
Unit price is total price divided by quantity — the only reliable way to compare different pack sizes. It applies the formula Unit price = price ÷ quantity and shows the working so you can check each step by hand.
Is the Unit Price Calculator free, and do I need an account?
It is completely free with no sign-up, no download and no usage limit. Everything is calculated in your browser, so the numbers you type never leave your device.
Results are estimates for general information. For medical, legal, structural or financial decisions, confirm with a qualified professional.