Syns in A Pint Of Fosters: Complete Slimming World Guide

Updated on 
9 March, 2026

How Many Syns In A Pint Of Fosters? Is It High In Syns?

If you're going down to the pub for a few drinks after work or maybe you plan to relax on the weekend, you might be wondering how many syns your usual pint of Foster has on the slimming world plan.

Is A Pint Of Fosters High In Syns?

One pint of Fosters has 10 syns on the slimming world plan making it high in syns, we therefore only suggest having a pint occasionally on the plan when your syns allow or switch to a half pint which only has 5 syns.

In our syn guide below, we will discuss how many Fosters you can drink on the slimming world plan, some syn values of other beers and low syn alternatives if you feel like drinking other kinds of alcohol.

How Much Fosters Can I Drink On Slimming World?

At 10 syns for a pint, you can have up to one and a half pints of Fosters on the slimming world plan before using all your 15 syn daily allowance.

Beer is very high in syns so you must consume it mindfully on the plan, you can moderate how much you drink by alternating the drinks with water and making sure you eat before since people tend to consume more alcohol when they are hungry.

Syn Values Of Beer

Beer has a similar syn value no matter the type of beer you choose, to help you track syns in your drink, we've listed a variety of popular beers down below along with their syn values.

Syn Values Of Beer
  • Fosters 550ml - 7.5 syns.
  • Guinness Original 440ml - 8 syns.
  • San Miguel 330ml - 8 syns.
  • Greene King IPA 500ml - 8.5 syns.
  • Carling - 8 syns for a pint.
  • Old speckled hen 500ml - 11.5 syns.
  • Corona 330ml – 7 syns.
  • Budweiser 330ml - 7.5 syns.
  • Corona Light 330ml – 4 syns.
  • Peroni 330ml – 6 syns.
  • Budweiser Light - 5 syns.
  • 1/2 pint 3.5% - 4 syns.
  • One pint 3.5%-4% - 9 syns.
  • 1/2 pint 4-6% - 6 syns.
  • 1/2 pint 6% and above - 9.5 syns.
  • One pint 6% - 18.5 syns.
  • One pint 3.5% - 7 syns.
  • One pint 4-6% - 11.5 syns.
  • Heineken 330ml - 7 syns.

Low Syn Alternatives To Fosters

If you find beer or Fosters to be too high in syns, there are plenty of other kinds of alcohol to have on the plan which won't cost you too many syns.

  • Rum 35-40% - 2.5 syns for 25ml.
  • Sparking Wine Like Champagne and Prosecco 125ml – 5 syns (also check out Nosecco).
  • Vodka - 3 syns for 25ml.
  • Magners Cider, Draught - 6 syns.
  • Red wine 10-12% 250ml - 10 syns.
  • Strongbow Dark Fruit Cider 4 x 440ml Cans - 9 syns.
  • Gin - 2.5 syns for 25ml.
  • Mojito - 5 syns.
  • Tequila sunrise - 4.5 syns. 
  • Espresso martini - 5 syns.
  • Red wine 10-12% 175ml - 7 syns a glass.
  • Whiskey - 3 syns for 25ml.
Low Syn Alternatives To Fosters

Final Words

Overall, a pint of Fosters has 10 syns on the slimming world making it high in syns, you could have up to a pint and a half of this drink before using up all of your daily syn allowance.

To save syns we recommend having just a half pint of Fosters or checking out our low syn alternatives like spirits which start as low as 2.5 syns for a single shot.

Frequently Asked Questions

How are syn values calculated?

Syn values are calculated using a formula based on calories, saturated fat and sugar content per serving. They’re not the same as calories — a product can be low in calories but higher in syns if it’s high in sugar or fat. Always check the official Slimming World app for the most accurate and up-to-date syn values.

Do syn values change?

Yes. When manufacturers reformulate their products, the syn value can go up or down. This is why we recommend double-checking with the Slimming World app or your consultant, especially if a product’s packaging has changed recently.

How many syns should I have per day?

Most Slimming World members work with 5 to 15 syns per day. Your consultant will advise on the right amount for you. The key is to use your syns on the things you enjoy most — whether that’s a chocolate bar, a glass of wine, or a packet of crisps.

Jennifer
Jennifer is a certified nutritionist and weight loss coach with a Master's in Nutrition from Cambridge. With over 10 years experience, she shares healthy recipes and science-backed slimming tips on SheCooksSheEats to help people reach their wellness goals. Jennifer stays up-to-date by regularly attending conferences and continuing her nutrition education. She aims to provide research-backed advice to inspire balanced, happy living.
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