Unit Price Calculator.
Compare up to 6 products side by side. Enter each item's price and quantity — the calculator finds the price per unit and highlights the best deal in green automatically.
Processed on our server. What you enter is sent over an encrypted connection, calculated, and returned. It is never written to a database or logged, and nothing is retained once the result is sent. Avoid entering passwords, API keys or other secrets. How we handle data
Up to 6 Options
Add up to 6 products simultaneously. The best deal is automatically highlighted in green as you type. Remove rows you don't need with the × button. The comparison updates in real time as prices or quantities change.
Any Unit Label
Type any unit label: oz, g, ml, count, serving, pack, lb — or leave it blank. The label is display-only and doesn't affect the calculation. It just makes the per-unit cost easier to interpret.
Unit Price Comparison Methodology.
The Calculation Branch
Industrial Standards.
Each item's per-unit cost is calculated by dividing the total price by the quantity. Items are compared by per-unit cost. The item with the lowest per-unit cost (among items with a non-zero price) is flagged as the best deal. Ties are both flagged if the difference is less than $0.0001.
In-Depth Analysis & Reference Data
Unit price comparison is critical for paper products, cleaning supplies, personal care, and bulk staples. A study published in the Journal of Consumer Policy found that unit prices can vary up to 400% within the same store shelf. Premium placement and packaging often commands a higher price-per-unit. Store brands frequently offer the same product at 30–50% lower per-unit cost than name brands. The unit price calculation also applies to services: cost-per-seat, cost-per-click, or cost-per-square-foot in real estate.
Registry Questions & FAQ.
What if two items use different units (oz vs. g)?
Convert them to the same unit before entering. 1 ounce = 28.35 grams. If Product A is listed in ounces and Product B in grams, multiply the oz quantity by 28.35 to convert to grams before entering. Mixing incompatible units will give a mathematically correct but meaningless comparison — the unit label is just text.
Should I always buy the lowest per-unit price?
Not always. Buying the bulk size only saves money if you use all of it before it expires. Perishables, products with short shelf lives, or items you use infrequently can actually cost more if you buy in bulk and waste part of the package. The unit price comparison is best applied to non-perishables or products you consume regularly.
Estimates for planning. Always confirm against an authoritative source.