Why Compare Price Per Unit?
When shopping, we see products in multiple sizes — e.g. shampoo 200ml at 89 THB vs 400ml at 159 THB. Which is better value? Many people choose by sticker price alone, missing the true value comparison.
Price Per Unit Formula
Price per unit = Price ÷ Quantity
- 200ml shampoo at 89 THB → 0.445 THB/ml
- 400ml shampoo at 159 THB → 0.398 THB/ml
The 400ml size saves about 11%.
Smart Shopping Tips
- Buy larger sizes if you have storage space and can use it before expiry
- Buy 1 Get 1 promotions are often better than 50% off
- Compare private label vs brand name — quality is often similar
Use our Price Comparison tool to compare multiple products and find the best value instantly.