A skinless chicken breast (165g) contains 193 kcal — one of the lowest calorie high-protein foods available in any UK supermarket. Chicken breast is free on Slimming World. A chicken thigh (skin on) is 229 kcal per thigh and 4 syns because of the skin fat. Remove the skin and the same thigh is free.
Chicken is the most useful Free Food on Slimming World for exactly this reason: it is high in protein, filling, versatile, and zero syns in almost every format as long as it is cooked without added fat. The syn cost on chicken almost always comes from the skin, the coating, or the sauce — not the meat itself.
This guide covers calories for every chicken cut, cooking method, and popular format — from chicken breast and thighs to nuggets and takeaway pieces.
A skinless chicken breast (165g) contains 193 kcal. A skinless chicken thigh (70g meat, no bone) contains 109 kcal. A chicken drumstick without skin is 76 kcal. All three are free on Slimming World when cooked without added fat.
| Chicken cut | Portion | Calories | Protein | SW Syns |
|---|---|---|---|---|
| Skinless chicken breast | 165g | 193 kcal | 36g | Free |
| Skinless chicken thigh (boneless) | 70g | 109 kcal | 14g | Free |
| Chicken thigh (skin on) | 90g with skin | 229 kcal | 17g | 4 |
| Chicken drumstick (no skin) | 55g meat | 76 kcal | 13g | Free |
| Chicken drumstick (skin on) | 75g with skin | 149 kcal | 15g | 2.5 |
| Chicken mince (5% fat) | 100g raw | 105 kcal | 20g | Free |
| Rotisserie chicken (breast, no skin) | 140g | 176 kcal | 33g | Free |
| Rotisserie chicken (thigh, skin on) | 100g | 240 kcal | 19g | 4.5 |
| Bernard Matthews Turkey Breast Slices | 4 slices (52g) | 57 kcal | 11g | Free |
Protein content matters as much as calories for weight loss — high protein foods keep hunger away longer. Chicken breast at 36g protein per 165g portion is one of the highest protein-per-calorie foods you can eat, which is why it is such a central Free Food on Slimming World.
Skinless chicken in all cuts is free on Slimming World when cooked without added fat. Chicken with skin carries a syn cost because the skin is high in fat. Breaded, battered, or coated chicken (nuggets, goujons, KFC) is not free because the coating adds fat and refined flour.
The practical rule: if you can see the skin, it costs syns. If the coating is not flour or breadcrumb — just seasoning — it is free. Grilled, roasted with Fry Light, poached, steamed, stir-fried with Fry Light — all free. Pan-fried in oil, battered, or skin-on roasted — all carry a syn cost.
A standard supermarket chicken breast weighs 165–200g raw. Cooked, it loses around 20–25% of its weight — a 165g raw breast produces approximately 125–135g cooked meat at 193 kcal raw or around 155 kcal cooked.
Supermarket chicken breasts have grown significantly in size over the past decade. A "standard" breast from Tesco or Sainsbury's often weighs 200–230g, which is 235–270 kcal rather than the 165g/193 kcal figure used as a standard reference. Weigh your chicken if calorie precision matters — the variance between a small and large breast can be 80+ kcal.
A boneless skinless chicken thigh weighs approximately 70–90g and contains 109–140 kcal. Chicken thighs are higher in fat than breast — around 6g fat per 100g versus 2g for breast — but still low calorie overall and free on SW when skin is removed.
Thighs are more forgiving to cook than breast — the higher fat content prevents them drying out. Most members who struggle with dry, rubbery chicken breast find that switching to thighs solves the problem without adding syns (as long as the skin is removed). Boneless skinless thighs from the freezer section are typically cheaper per kg than fresh breast and work well in casseroles, curries, and stir-fries.
Supermarket chicken nuggets contain approximately 55–70 kcal each depending on brand and size. A 6-nugget portion of Birds Eye chicken nuggets (160g) contains 292 kcal and approximately 15 syns. McDonald's 6-piece McNuggets are 270 kcal and around 13 syns.
Chicken nuggets are not free on SW because of the breadcrumb coating. Homemade SW nuggets — chicken breast dipped in beaten egg and crushed Weetabix or breadcrumbs, then oven-baked — come in at around 1–2 syns per batch versus 13–15 for shop-bought, and taste closer to homemade than the frozen version anyway.
A KFC Original Recipe chicken piece (breast) contains approximately 340 kcal and 17 syns. A drumstick is around 160 kcal and 8 syns. The coating — 11 herbs and spices in a seasoned flour mix fried in oil — accounts for around half the total calories of each piece.
KFC is one of the hardest takeaways to make work on Slimming World because there is no low-syn option on the standard menu. The lowest calorie item is the Little Fillet Burger at around 300 kcal, which is still 15 syns. Most members treat KFC as an occasional planned treat rather than a regular option.
Chicken breast is one of the most effective foods for weight loss — high protein content (31g per 100g) keeps hunger suppressed for longer than carbohydrate or fat. Research from the American Journal of Clinical Nutrition found that increasing dietary protein to 30% of total calories reduced spontaneous calorie intake by 441 kcal per day in participants without any other dietary restriction.
On a practical level: a 165g chicken breast at 193 kcal keeps most people full for 4–5 hours. The same 193 kcal from biscuits (around 5 Rich Teas) would not. The satiety difference between high-protein and low-protein foods of identical calorie content is the core reason protein-focused plans like Slimming World work.
For other Free Food protein comparisons, see calories in salmon UK and calories in mince UK.
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