Syns in Hartleys Sugar Free Jelly: Complete Slimming World Guide

Updated on 
9 March, 2026

Is Hartleys Sugar-Free Jelly Slimming World Friendly?

If you have a sweet tooth, finding sweet snacks which are low in syns in the slimming world isn't always easy, but what about Hartley's sugar-free jelly, are they SW-friendly?

Is Hartleys Sugar-Free Jelly Slimming World Friendly?

Hartleys sugar-free jelly has 0.5 syns per serving making it very low in syns, this makes it a great sweet snack to have on the SW plan.

In our syn guide below we will take you through how much Hartley's sugar-free jelly you can have on the slimming world, some syn values of them and low syn alternative jelly for a sweet snack.

 

 

How Much Hartleys Sugar-Free Jelly Can I Have On Slimming World?

At 0.5 syns for one Hartleys sugar free jelly, you can have up to 30 of these jellies per day on the slimming world before using all of your 15 syn daily allowance making them a great low syn sweet treat.

These Hartley jelly types are low in syns thanks to them being low in sugar and are sweetened with sweeteners instead. For a great low-syn dessert you can also have them with fat-free plain yoghurt.

 

 

Syn Values Of Hartley's Jelly

Hartley's has a huge range of jellies on offer with different flavours for easy sweet snacks, we've listed them down below to help you stay on track with your syns.

Syn Values Of Hartley's Jelly
  • Hartley's 10 Cal Strawberry Flavour Jelly 175g - 0.5 syns.
  • Hartley's 10 Cal Raspberry Flavour Jelly 175g - 0.5 syns.
  • Hartley's 10 Cal Blueberry & Blackcurrant Flavour Jelly 175g - 0.5 syns.
  • Hartley's 10 Cal Orange Flavour Jelly 175g - 0.5 syns.
  • Hartley's 10 Cal Mango & Passion Fruit Flavour Jelly 175g - 0.5 syns.
  • Hartley's Sugar Free Blackcurrant Flavour Jelly 2 x 11.5g - 0.5 syns.
  • Hartley's Lemon & Lime Flavour Jelly Sugar-Free Twin Pack 23g - 0.5 syns.
  • Hartley's 10 Cal Cranberry & Raspberry Flavour Jelly 175g - 0.5 syns.
  • Hartley's Jelly Sours Cherry Flavour 125g - 2 syns.

 

 

Low Syn Alternatives To Hartleys Sugar Free Jelly

If you're getting bored of Hartleys sugar free jelly, there are plenty of other low-syn alternatives to have for a sweet treat which won't cost you too many syns.

  • Aldi Dominion Sugar Free Jelly Bears 75g - 2.5 syns.
  • Aldi Delicious Desserts Raspberry Flavour Sugar Free Jelly Crystals 11.5g - 0.5 syns.
  • Jell-O Sugar Free Strawberry Jelly Mix 8.5g - 0.5 syns.
  • Chivers Sugar Free Strawberry Flavour Jelly Crystals 11.5g - 0.5 syns.
  • Chivers Sugar Free Raspberry Flavour Jelly Crystals 11.5g - 0.5 syns.
  • Green's Sugar Free Strawberry Jelly 17g - 0.5 syns.
  • Robinsons Sugar Free Jelly Orange & Pineapple Flavour 11.5g - 0.5 syns.
  • Robinsons Sugar Free Jelly Apple and Blackcurrant Flavour 11.5g - 0.5 syns.
  • Robinsons Sugar Free Jelly Summer Fruits Flavour 11.5g - 0.5 syns.
  • Jell-O Sugar Free Orange Jelly Mix 8.5g - 0.5 syns.
  • Morrisons Strawberry Flavour Sugar Free Jelly 11.5g - 0.5 syns.
Low Syn Alternatives To Hartleys Sugar Free Jelly

 

 

Final Words

To conclude, Hartleys sugar free jelly is very low in syns having 0.5 syns per pot, meaning you could have up to 30 per day on the plan before using all of your 15 syn daily allowance!

These jellies are low in syns thanks to them being sugar-free, serve with low syn ice cream or fat-free yoghurt for a sweet dessert.

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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