Unit Price Comparison
Compare packages by price per unit and identify the best value
| Package name | Price | Quantity | Price per unit |
|---|
Unit Price Comparison — what it does
Compare packages of different sizes by price per unit, adding each option with its price and quantity to see which is genuinely cheaper. Shelf pricing is designed to make this comparison hard, and calculating the unit price is the one reliable defence against a bigger box that costs more per gram.
When this tool helps
- Comparing supermarket package sizes where the larger one is not always better value.
- Evaluating supplier quotes offered in different quantities.
- Deciding whether a bulk discount actually beats buying the smaller pack.
How to use it
- Set the unit label, such as grams or millilitres.
- Add each package with its name, price and quantity.
- Add as many options as you are comparing.
- Calculate to see price per unit and the best value.
Accuracy, limits, and good practice
- Compare in the same unit throughout — a 1.5 kg pack against 750 g pouches only compares once both are expressed per gram.
- Bigger is not automatically cheaper; multi-buy and family sizes are frequently priced above the standard pack per unit.
- Unit price is not the whole decision: waste, storage and expiry all count against buying more than you will use.
Frequently asked questions
Which unit should I use?
Whichever is natural for the product — grams for dry goods, millilitres for liquids, sheets or count for items.
Do shops not already show unit prices?
Many are required to, but the units chosen differ between products and shops, which makes direct comparison harder than it looks.
How many packages can I compare?
Add as many as you need; each is listed with its own price per unit alongside the others.
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Everything above runs inside this page. Unit Price Comparison needs no account, no upload, and no server round trip — close the tab and nothing is left behind.
單位價格比較能做什麼
以每單位價格比較不同容量的包裝，逐一加入各選項的價格與數量，看出哪個真的比較便宜。貨架訂價本來就是為了讓這種比較變難，而算出單位價格，正是對付「更大盒卻更貴」最可靠的防線。
什麼時候用得上
- 比較超市各種包裝規格，因為大包裝未必比較划算。
- 評估以不同數量報價的供應商方案。
- 判斷量販折扣是否真的勝過買小包裝。
使用步驟
- 設定單位標籤，例如公克或毫升。
- 逐一加入各包裝的名稱、價格與數量。
- 把要比較的選項全部加進來。
- 計算後查看每單位價格與最划算的選項。
精確度、限制與實務建議
- 全程使用同一種單位——1.5 公斤裝與 750 公克包，換算成每公克才比得出來。
- 大不等於便宜；多入組合與家庭號的單位價格經常高於標準包裝。
- 單位價格不是決策的全部：浪費、存放空間與有效期限，都是買超過需求的代價。
常見問題
該用哪個單位？
以商品自然的單位為準——乾貨用公克、液體用毫升、成件商品用張或個。
商店不是已經有標單位價格嗎？
許多地區有規定要標，但不同商品與商店選用的單位不同，直接比較仍比想像中困難。
可以比較幾個包裝？
要幾個加幾個，每個都會與其他選項並列顯示各自的每單位價格。
本站相關工具
以上步驟全部在這個頁面內完成，單位價格比較 不需要註冊、不上傳檔案、也不經過伺服器，關閉分頁後不會留下任何資料。