Shopping for one
If you expect to eat the whole tray, a one-serving pack makes the calorie total easier to use. Sainsbury's lists its frozen Be Good to Yourself Cottage Pie as one serving, with 225 kcal per 350g pack.
Who is this for?
Comparing protein as well as calories
If protein and vegetables matter to your choice, compare those figures alongside energy and salt. The Birds Eye Get Real Protein Red Thai Chicken Curry lists 35g protein and 368 kcal per bowl; Waitrose & Partners lists 1.80g salt per serving.
Adding a freezer meal to a small shop
If you want to browse a frozen range, Tesco groups meals in an Under 500cal Meals category, while Iceland lists Slimming World frozen meals. Check the individual product label and availability before choosing.
What should you compare?
Start with the portion you intend to eat, then compare the label and preparation instructions for meals that fit your shop.
| Priority | What to check | Your needs |
|---|---|---|
| Portion calories | Check kcal for the whole pack or the portion you will eat. Confirm the number of servings; use kcal per 100g to compare products, not as a substitute for the meal total. | I want to know the calories in my actual meal, especially if I plan to eat the entire tray. |
| Nutrition label | Compare salt and saturated fat per 100g and per portion, and fibre where declared. The NHS describes more than 1.5g salt per 100g as high. | A lower calorie figure alone will not settle my choice if I also want to compare salt or saturated fat. |
| Protein and vegetables | Read the stated protein and vegetable amounts alongside whole-portion calories and salt. Birds Eye lists 35g protein and 160g vegetables for its Red Thai Chicken Curry bowl. | For some meals, I would consider a higher calorie total if the stated protein and vegetable amounts suit what I am looking for. |
| Preparation | Check whether the meal can be microwaved or oven-cooked from frozen. Read the pack for equipment settings, storage and reheating instructions. | I need a meal that works with the equipment and time I have available. |
What can catch you out?
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Taking a range name as the portion figure
An under-500 kcal category helps narrow a search, but it does not tell you the calories in every portion you might eat.
Check the selected meal's kcal per serving and servings per pack before comparing it with another tray.
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Looking only at calories
In its May 2025 audit of 1,511 chilled and frozen ready meals from 11 UK retailers, Action on Salt & Sugar classified 56% as high in salt and 42% as high in saturated fat.
Compare salt and saturated fat on the nutrition labels of meals with calorie totals that suit your intended portion.
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Assuming a listing means local stock
A retailer's product page may not reflect what is available at your store or delivery postcode when you shop.
Check availability for your location before planning the rest of your top-up shop around one meal.
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Skipping the cooking and pack details
Frozen meals can have different microwave and oven instructions, and a multi-serving pack changes a whole-pack calorie comparison.
Read the selected pack for portions, ingredients, allergens, storage and the cooking method you can use.
Brand and retailer references
Tesco Calorie Controlled
Tesco lists its Calorie Controlled Chicken Tikka Masala 350g and Lasagne 350g in its frozen Under 500cal Meals category.
- The category lets you browse several frozen meals in one place.
- Check the selected product's portion size, nutrition panel and allergens rather than using the category name as its complete label.
Sainsbury's Be Good to Yourself
Sainsbury's lists its frozen Cottage Pie 350g as one serving with 225 kcal per pack.
- The one-serving, whole-pack figure is useful when comparing a meal for one.
- Compare its full nutrition label with other meals if salt or protein also matters to your choice.
Birds Eye Get Real Protein
Birds Eye lists 368 kcal, 35g protein and 160g vegetables for its frozen Red Thai Chicken Curry bowl.
- The published bowl figures allow protein, vegetables and calories to be considered together.
- Waitrose & Partners lists 1.80g salt per serving; check that figure and current availability before choosing it.
Slimming World at Iceland
Iceland describes Slimming World as a frozen range including ready meals and lunch bowls. Its Beef Lasagne 550g has microwave- and oven-from-frozen instructions.
- The range offers a place to browse frozen meal formats during an Iceland shop.
- Use the individual pack's energy and nutrition figures rather than assuming a calorie total from the range name.
M&S Count on Us
M&S describes Count on Us as a calorie-controlled ready-meal range.
- The range may help narrow a ready-meal search.
- Confirm that the individual meal is sold frozen before choosing it for a freezer top-up shop.
Joybuy product options
This frozen dumpling option is relevant if a microwave meal suits your top-up shop. Check its portion information against the ready-meal figures discussed above.
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Itsu Chicken Soup Dumplings 6Packs
These frozen dumplings are a microwave meal option. Check the calories and salt for the portion you intend to eat, confirm what the six-pack contains, and follow its cooking instructions.
Common questions
Does an under-500 kcal category tell me the calories in my portion?
No. Tesco's frozen Under 500cal Meals category is a browsing route; check the chosen product's energy per portion and number of servings to assess the amount you will eat.
Should I compare calories per pack or per 100g?
Start with the calories in the portion you intend to eat, then use per-100g figures when comparing products. The NHS notes that labels give energy per 100g and sometimes per portion; a manufacturer's portion may differ from yours.
What else on the label matters when comparing frozen meals?
Compare salt and saturated fat alongside calories, then read protein, fibre where declared, ingredients and allergens according to what matters for your shop. The NHS describes more than 1.5g salt per 100g as high.
Can I microwave a frozen ready meal without defrosting it?
Only follow a microwave-from-frozen method when the selected product gives one. Sainsbury's frozen Cottage Pie and Birds Eye Red Thai Chicken Curry both provide such instructions, but use the timings and microwave settings on the individual pack.
How should I store a frozen meal after a top-up shop?
Follow its own storage and reheating instructions. Sainsbury's says to keep its Cottage Pie frozen at -18°C; Birds Eye says to store its Red Thai Chicken Curry at -18°C or cooler and not to refreeze it after defrosting.