Which is Cheaper?

Worked Example — 500 g @ ₹120 vs 1 kg @ ₹200

Common Mistakes to Avoid

• Comparing total package prices instead of normalized unit rates. A ₹120 package seems cheaper than a ₹200 package at first glance, but if the ₹120 pack has 500g (₹240/kg) and the ₹200 pack has 1kg (₹200/kg), the ₹200 pack actually provides 16.7% better value for your money.
• Assuming the larger family pack is automatically cheaper. Manufacturers often price smaller promo packs or pouches at steep discounts during sales events, while standard 5kg or 10kg bulk bags stay at regular MRP. Always calculate the price per kg or litre before assuming the bulk size wins.
• Attempting to compare weight against volume without density. 1 litre of cooking oil or milk does not weigh 1 kilogram. Without knowing exact substance density, converting litres to kilograms is inaccurate. Keep comparisons strictly within the same dimension (weight vs weight, or volume vs volume).
• Ignoring package size differences when assessing deals. Two brands offering cooking oil at ₹180 might seem identical, but one bottle may contain 900ml while the other contains a full 1,000ml (1 Litre), resulting in an 11% hidden price difference.
• Confusing total checkout budget with long-term per-unit savings. Buying the cheaper unit rate saves money per gram, but if you only have ₹150 in cash today, buying the ₹120 pack fits your immediate budget even if the larger ₹200 pack offers higher per-unit efficiency.