Grocery Inflation Calculator: How Much More Is Your Weekly Shop Costing You?

At Savzz, we help people find ways to get more from their money. This calculator does something most people have never done, it puts a real annual figure on how much food inflation has cost their household, and shows what switching supermarket would actually save them per year.

Most people have a vague sense that their weekly shop costs more than it used to. This tool makes that vague feeling a specific number. Enter what you spend now, pick your supermarket and how far back you want to compare, and see the full picture.

Who Is This Calculator For?

This tool is useful for anyone who buys food in the UK and wants a clear picture of how inflation has changed what they pay. It is especially relevant if you are:

• Someone who feels like their weekly shop is noticeably more expensive than it was a year or two ago and wants to see the real annual figure rather than a vague sense of it being higher
• A household trying to cut the food bill and wanting to see how much switching from their current supermarket to a cheaper one would actually save per week and per year
• Anyone comparing supermarkets and wanting a clearer picture of the real price difference between Waitrose and Aldi, or between Tesco and Lidl, based on their specific weekly spend
• A family with children who has seen the grocery bill rise and wants to understand how much of that is inflation versus how much is down to what they are buying
• Someone who shops at a premium supermarket and wants to see, honestly, what moving their main shop to a discount chain would save over a full year
• A journalist or researcher wanting a tool that applies real ONS food inflation categories to a specific household basket rather than a generic national average

Who Is This Calculator Not Suitable For?

• Anyone looking for precise to-the-penny price comparisons. The supermarket multipliers are based on published price comparison research and are accurate as general guides. Individual product prices vary by region, promotion, and loyalty card. This calculator gives realistic estimates rather than a precise basket comparison.
• Anyone outside the UK. The inflation rates are based on ONS UK data. Food price inflation varies significantly by country and the supermarket comparisons are UK-specific.

How to Use the Grocery Inflation Calculator

Enter your typical weekly grocery spend in the first field. This should be the total you spend on food and household essentials per week across your whole household.

Select your household size and diet type. A vegan household, a high-protein diet, and a family with a baby all face slightly different food price pressures and the calculator adjusts for this.

Choose which supermarket you currently use most often. The calculator shows you how your spend compares across every major UK chain and what the same basket would cost elsewhere.

Select how far back you want to compare: one year ago, two years, five years, or a custom inflation rate if you want to model a specific scenario.

The optional category breakdown lets you enter your spending by food type: meat, dairy, fruit, vegetables, ready meals, and so on, and shows the inflation rate specific to each category. Ready meals and baby food, for example, have inflated faster than fruit and vegetables over the past five years.

How Much Has Food Inflation Cost UK Households?

The Office for National Statistics has tracked food price inflation monthly for decades. The years between 2021 and 2024 saw some of the sharpest food price rises in a generation, with grocery inflation peaking at around 19% in early 2023 before gradually easing.

Here is what that looks like in real money for different weekly spends:

£60 per week (one or two people): If your shop cost £60 today and you compare it to three years ago when food inflation was running at its peak, the equivalent basket would have cost around £50. Food inflation over that period has cost this household around £520 per year extra.

£100 per week (small family): The same comparison gives a historical equivalent of around £83. The extra annual cost due to inflation is roughly £884 per year, the equivalent of a weekend holiday.

£150 per week (larger family): Inflation has added roughly £1,326 per year to this household’s grocery bill compared to three years ago. That is a meaningful financial hit that most families have absorbed without a specific number ever being put on it.

£200 per week (large family or big household): At this spend level, food inflation since 2020 has added well over £1,500 per year to the grocery bill. That is money that would otherwise have gone towards savings, holidays, or paying down debt.

The calculator lets you see your own figure rather than working from these examples.

Which Supermarket Is Actually Cheapest?

The short answer most people already know is Aldi and Lidl. The more useful answer is by how much, and what that means in actual pounds per week for your household.

Published price comparison data from consumer groups including Which? and the Grocer consistently shows the following relative pricing between UK supermarkets. Using Tesco as the baseline:

Aldi and Lidl price the same basket of goods at around 15% to 20% cheaper than Tesco. For a household spending £100 per week at Tesco, the equivalent shop at Aldi costs around £82 to £85. That is a saving of £780 to £936 per year on the same essential groceries.

Asda and Morrisons typically come in around 5% to 8% cheaper than Tesco for an equivalent basket. A £100 weekly shop costs around £92 to £95 at these chains. The saving is real but less dramatic than the discount chains.

Sainsbury’s is broadly similar to Tesco on most comparable items, occasionally a few percent higher on branded goods.

M&S Food and Waitrose run a lot higher than the mainstream chains, typically 18% to 22% above Tesco. A household spending £100 at Tesco would pay around £118 to £122 for a comparable shop at Waitrose.

The supermarket comparison bar chart in the calculator shows exactly where your current shop sits in this range and what the alternatives would cost per week.

Why Different Food Categories Have Inflated at Different Rates

Not all food prices have risen at the same speed. Understanding which categories have inflated the most helps explain why some households have felt the squeeze harder than others.

Ready meals and processed food saw some of the highest inflation between 2020 and 2024, with prices rising by around 29% to 35% in the category over five years. Energy costs for food manufacturing, packaging materials, and labour all increased at the same time, and ready meal manufacturers passed most of these costs on.

Dairy products including milk, cheese, and eggs saw sharp inflation driven by feed costs, energy for refrigeration, and reduced supply from some farming regions in Europe. Butter and cheese prices at their peak in 2023 were around 40% higher than in 2020.

Oils and fats were one of the most extreme categories. Sunflower oil prices spiked sharply due to supply disruption and even cooking oil became a restricted purchase at some supermarkets at peak. Prices have since fallen back but remain above pre-2020 levels.

Fruit and vegetables rose at a lower rate than most other categories, partly because many fresh produce prices are more closely linked to seasonal and local supply conditions than to global energy and processing costs.

Bread and cereals were affected by wheat price rises linked to global supply. A standard loaf that cost around £1 in 2020 regularly reaches £1.40 to £1.60 in 2025 at mainstream supermarkets.

The optional category breakdown in the calculator lets you enter your specific spending on each of these areas and see the inflation figure for each one separately.

Is It Worth Switching Supermarket?

This is the question most people have already asked themselves at some point in the last three years and the calculator gives you a specific answer based on what you actually spend.

The honest answer depends on what you value in a supermarket experience alongside price. Here is a practical breakdown:

Switching from Waitrose or M&S to Aldi or Lidl saves the most money but involves the biggest change. The product range is smaller, there are no branded alternatives for most items, and the shopping experience is different. For some households this is a perfectly happy switch. For others it does not fit their cooking style or the specific products they rely on.

Switching from Tesco or Sainsbury’s to Aldi or Lidl is the most common switch UK households are making right now and involves less compromise than most people expect. Aldi and Lidl’s quality on staples: bread, dairy, fruit, vegetables, meat is broadly comparable to mainstream supermarket own-brand and their special buy sections offer variety. The main thing you give up is the ability to buy specific branded products at the same shop.

Switching from Asda or Morrisons to Aldi or Lidl saves less per week but still produces a meaningful annual figure for a typical household.

The split shop approach is what many cost-conscious households settle on. Aldi or Lidl for staples like dairy, bread, fruit, vegetables, meat, frozen food, and one trip to a mainstream supermarket for specific branded items, cleaning products, or items the discount chains do not stock. This captures most of the saving while maintaining access to specific products.

Loyalty Cards and Own-Brand: How Much Do They Actually Help?

Supermarket loyalty cards have become a big part of the UK grocery pricing landscape. Tesco Clubcard prices and Sainsbury’s Nectar card prices represent meaningful discounts on hundreds of items compared to the standard shelf price paid by non-members.

Research from Which? found that Clubcard prices at Tesco are on average around 18% lower than the same items without a card. On a £80 weekly shop, that is a saving of around £14 per week or £728 per year for Clubcard members versus non-members at the same store. The comparison with Aldi and Lidl narrows when Clubcard prices are factored in.

Own-brand switching is the other main tool available to shoppers who do not want to change supermarket. Switching from branded to own-brand versions of the same product consistently saves 20% to 40% on that item. The categories where own‑brand performs best value, such as dairy, pasta, rice, cereals, canned goods and cleaning products, are also things people buy all the time, making the saving add up quickly across a weekly shop.

Tips for Reducing Your Weekly Grocery Bill Without Switching Supermarket

• Plan meals before you shop. People who write a meal plan and a shopping list before going to the supermarket spend less than those who shop without one. The reason is simple, you buy what you need rather than what catches your eye, and you waste less because everything you buy has a planned use.
• Check the reduced section. Most supermarkets mark down fresh food approaching its best-before date, usually in the late morning and again in the early evening. Reduced bread, meat, dairy, and ready meals are regularly 30% to 75% off. Anything you can freeze goes straight in the freezer and costs a fraction of the full price.
• Switch specific branded items to own-brand. Rather than switching your whole shop, identify the five or ten products you buy most often where the branded version costs a lot more than the own-brand alternative. Switching those specific items saves a meaningful amount without changing anything else about how you shop.
• Buy in bulk where you have storage. Non-perishable staples like pasta, rice, tinned goods, cooking oil, coffee, and cereal, cost less per unit when bought in larger quantities. This requires upfront cash but saves money over time and reduces the number of shopping trips needed.
• Use the freezer more deliberately. Buying larger packs of meat, fish, and bread and freezing what you do not use immediately reduces the average price per meal and cuts food waste, which is one of the biggest hidden costs in most household grocery budgets.
• Search Savzz before ordering groceries online. Our grocery discount codes page lists working discount codes for online grocery retailers and food delivery services. A code on a weekly order adds up over a year.

The Smarter Way to Shop: Understand the Cost, Then Find a Deal

The calculator gives you the honest picture of what food inflation has cost your household and what alternatives look like. Once you have that number, the next step is making sure you are not paying full price on what you do buy.

Browse our grocery deals, hot drinks vouchers, soft drinks offers, and vitamins and supplements discount codes before you place your next order. A working code on a regular weekly or monthly order is one of the simplest ways to reduce what groceries cost without changing anything about how you eat.

Frequently Asked Questions

How much has food inflation risen in the UK?

UK food inflation peaked at around 19% in March 2023, the highest rate in over 45 years. It has eased since then but food prices remain considerably higher than pre-2021 levels. The ONS publishes monthly food price data by category. The calculator uses these category-level inflation rates to give a more accurate picture than a single average figure.

Which UK supermarket is cheapest overall?

Aldi and Lidl often come out cheapest across published basket comparisons by Which?, the Grocer, and consumer groups. Research puts their prices at around 15% to 20% below Tesco on a comparable basket of goods. Asda and Morrisons come in cheaper than Tesco and Sainsbury’s by a smaller margin of around 5% to 8%. Waitrose and M&S Food consistently price at a premium above Tesco, typically 18% to 22% higher.

Is it worth doing a split shop between supermarkets?

For most households, yes. Doing the bulk of a weekly shop at Aldi or Lidl for staples and visiting a mainstream supermarket for specific branded items or fresh produce you prefer from that chain captures most of the price saving while maintaining access to products the discount chains do not stock. The extra trip takes time but the annual saving typically justifies it for households spending £80 or more per week.

Why has food got so much more expensive in the UK?

The sharp rise in food prices between 2021 and 2023 was driven by a combination of factors hitting at the same time. Energy costs for farming, food production, and refrigeration rose sharply following the Russia-Ukraine conflict. Global supply chain disruption from COVID-19 raised the cost of packaging, transport, and ingredients. Labour shortages in food processing and logistics added further cost pressure. Many of these costs were passed on to consumers through price rises, and some categories such as oils, dairy and ready meals were hit harder than others.

Does the ONS food inflation figure apply to my household?

The ONS figure is a national average across all food categories. Your personal food inflation depends on what you buy and where you buy it. A household that eats a lot of ready meals has seen higher inflation than one that cooks from scratch. Someone who shops at Aldi has seen lower effective food price rises than someone who shops at Waitrose. The category breakdown in the calculator lets you see which food types you spend most on and what the inflation rate for each category has been.

Who built this calculator?

The Savzz Grocery Inflation Calculator was built by the team at Savzz.co.uk, a UK discount code and money-saving site. We built it because most food inflation tools give a single percentage figure without showing what it means for a specific household at a specific supermarket with a specific diet. This one does all three. The supermarket comparison feature and the category-level inflation breakdown are both unique to this tool. It is completely free to use with no sign-up needed.