Quick answer
Compare the price per unit
Shrinkflation means a product becomes smaller without an equivalent fall in price. To check it, compare what you pay for the same amount: per kilogram, per litre, per sheet, or another meaningful unit. The US Bureau of Labor Statistics explains product downsizing and how its CPI calculations account for identified size changes.
You do not need to investigate every brand. Start with a few products you buy often enough for the change to matter. Keep the pack size alongside the price; the receipt alone may not contain both.
A smaller pack can hide a larger increase
Consider a fictional product that costs Rs 300. Previously it contained 500 grams; now it contains 400 grams.
| Comparison | Old pack | New pack |
|---|---|---|
| Pack price | Rs 300 | Rs 300 |
| Net quantity | 500 g | 400 g |
| Price per 100 g | Rs 60 | Rs 75 |
The quantity fell by 20%, but the price per 100 grams rose by 25%. Those percentages are different because they use different starting values.
Use two calculations:
- Unit price = pack price ÷ quantity × comparison unit.
- Unit-price increase = (new unit price ÷ old unit price − 1) × 100.
Here, Rs 300 ÷ 400 × 100 gives Rs 75 per 100 grams. Comparing Rs 75 with Rs 60 gives a 25% increase. The arithmetic is the same with another currency or with millilitres instead of grams.
What if the price and size both change?
Suppose the replacement pack costs Rs 320 for 400 grams. Its unit price is Rs 80 per 100 grams. Against the old Rs 60, that is about 33.3% higher—not merely the 6.7% rise in the shelf price.
This calculation tells you what happened to this product, not how much all your living costs rose. A single product is not a complete grocery basket, and a grocery basket is not your entire budget.
For another comparison, a 400-gram pack at Rs 320 and a 750-gram pack at Rs 570 cost Rs 80 and Rs 76 per 100 grams respectively. The bigger pack has the lower unit price. It still requires Rs 250 more upfront, and it is only helpful if you can use it.
Compare the part you can actually use
Net weight is useful, but it does not settle every comparison. Check whether the products do the same job:
- For canned food, drained weight may be more relevant than total weight.
- For concentrated cleaning products, compare usable doses according to the instructions.
- For paper products, roll count alone can hide changes in sheet count or sheet size.
- For multipacks, compare the total contents, not just the number of packets.
- For fresh food, consider how much you can use before it spoils.
Different quality, ingredients, or dietary requirements can make the cheapest unit unsuitable. A comparison is a way to understand the trade-off, not an instruction to buy the cheapest product regardless of need.
Do not compare grams with millilitres without a sound conversion. Likewise, a two-for-one offer changes the effective price only if you qualify for it and actually receive both items.
Keep a short price-and-size record
A small table is enough:
| Date | Product and variant | Amount paid | Net quantity | Unit price | Discount or note |
|---|---|---|---|---|---|
| Example: first shop | Same product, same variant | Rs 300 | 500 g | Rs 60 per 100 g | No promotion |
| Example: later shop | Same product, same variant | Rs 300 | 400 g | Rs 75 per 100 g | Smaller pack |
Record your own dates rather than treating these examples as live prices. A photograph of the label can help if the receipt abbreviates the product name. If an old pack size is unknown, leave it unknown; guessing produces a precise-looking but unreliable result.
Keep discounts consistent. Comparing a one-time sale with today's normal price shows a change in what you paid, but does not by itself prove the standard price rose.
Use the result to make one buying decision
If the unit price rises, compare one suitable alternative, wait for a purchase you do not need immediately, or adjust the shopping budget. Do not stockpile only because you fear another increase. Storage, expiry, and money needed for other bills still matter.
Higxel can help retain reviewed receipt expenses. This comparison still needs accurate pack sizes, which may not appear on the receipt. Do not assume receipt scanning automatically detects shrinkflation. Our guide to organising receipts digitally explains the record-keeping side.
If the whole grocery bill has changed, use the grocery bill diagnosis to separate price changes from buying different quantities or products. That is more useful than blaming every increase on shrinking packs.
Prepared with AI assistance for Higxel Editorial. Product prices and pack sizes in the examples are fictional. Calculations are general educational examples, not personal financial advice. The source was checked on October 8, 2026; the linked BLS explanation was published in February 2023 and is not a 2026 prevalence estimate.
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