Shopping and unit price calculators to find the real deal
The shelf tag rarely tells the whole story. These calculators break a price down to its smallest unit so you can compare products, evaluate discounts, and shop with accurate numbers.
Calculators in this collection
- Discount Calculator
Find the sale price before you check out.
- Cost Per Ounce Calculator
Compare unit prices by the ounce.
- Cost Per Pound Calculator
Find the price of one pound.
- Cost Per Serving Calculator
See how much each serving costs.
- Tip Calculator
Add a tip and split the bill fairly.
- Percentage Calculator
Find X percent of any number.
- Percentage Change Calculator
See how much a value went up or down.
- Profit Margin Calculator
Find profit and margin from cost and price.
- Markup Calculator
Set a selling price from cost and markup.
- Should I Buy It Calculator
Weigh a purchase in hours and uses.
- Subscription Worth It Calculator
Check if a subscription pays off.
Frequently asked questions
Why does the bigger package sometimes cost more per ounce?
Bulk pricing is not universal. Retailers occasionally price smaller sizes as loss leaders or charge a premium on flagship sizes. Checking the unit price before buying is the only reliable way to find the better deal.
Can I use the discount calculator for stacked promotions?
Apply the first discount, take the resulting price, then run the second discount as a new calculation. Stacked discounts do not simply add their percentages together.