How Many Syns in Sugar?

A level teaspoon of sugar (approximately 4g) is 0.5 syns on Slimming World. A rounded teaspoon, which is closer to how most people actually measure sugar into a hot drink, is around 1 syn at roughly 6g. This applies to all standard sugar types: white granulated, caster, golden, brown, demerara, and muscovado are all essentially the same syn value per gram because they are all primarily sucrose or very similar simple carbohydrates. The most impactful way to use this information is to track how many sugars you actually use across all your drinks in a day, which is often more than people realise.

Yes, all standard zero-calorie sweeteners are free on Slimming World. This includes Canderel tablets and granules, Splenda granulated and sachets, Truvia, Stevia, Sweet Freedom, and own-brand supermarket sweeteners in tablet or granule form. Liquid sweetener drops are also free. This makes sweeteners one of the most powerful tool for saving syns in hot drinks and baking — a direct swap from two sugars in every cup of tea to a sweetener tablet can save 2 syns per cup, which adds up to 8 to 10 syns per day for someone who drinks four or five cups. In baking, granulated sweeteners work well in most sponge-style recipes as a one-for-one sugar substitute.

No, brown sugar and demerara are not lower in syns than white granulated sugar. The syn values are essentially the same per gram because all of these sugars are primarily sucrose — the golden colour and slightly different flavour of brown sugar and demerara comes from the presence of molasses, not from any meaningful difference in calorie or carbohydrate content. Both are approximately 0.5 syns per level teaspoon and 1 syn per rounded teaspoon. Coconut sugar and other alternative sugars marketed as healthier options are the same syn value per gram for the same reason. Only zero-calorie sweeteners genuinely reduce the syn cost of sweetness.

Add up the total syns for all the sugar in your recipe, then divide by the number of portions. Sugar is approximately 20 syns per 100g (1 syn per level teaspoon, or 2.5 syns per tablespoon). If a cake recipe uses 150g of sugar, that is 30 syns from sugar alone. Divide across 12 slices and that is 2.5 syns per slice from the sugar. You then add the syns from butter, flour, and any other synnable ingredients to get the total syn value per portion. Many Slimming World baking recipes substitute some or all of the sugar with granulated Splenda and the butter with quark, dramatically reducing the syn count without a big change in taste for lighter sponge-style bakes.

A standard white sugar sachet as served in cafés contains approximately 4 to 5g of sugar, which is 0.5 syns. Two sachets in a coffee is therefore around 1 syn. The small brown demerara sachets are the same syn value — around 0.5 syns per sachet. This is helpful to know when you are eating out and cannot weigh anything. If you order a coffee with two sugars in a café, you are spending approximately 1 syn on the sugars, which is easy to plan for. Asking for sweetener in drinks when eating out is the syn-free alternative, and almost all cafés and restaurants have sweetener sachets available.