How many calories are in a slice of watermelon?
The calories in a slice of watermelon depend on the size of the slice: a single triangular slice is about 15 calories and one standard portion 45.
The calories in a slice of watermelon depend on the size of the slice. Three of the 9 × 6 × 2 centimeter triangular slices defined by TÜBER, Türkiye's national dietary guideline, make one standard portion and carry about 45 calories according to TürKomp; a single slice is a third of that, that is about 15 calories. As the slice gets thicker the figure grows fast.
Sources
- TürKomp — Ulusal Gıda Kompozisyon Veri Tabanı 08.01.0029 100 g yenilebilir kısım (Karpuz, çekirdekli) accessed: 2026-08-15
- TürKomp — Ulusal Gıda Kompozisyon Veri Tabanı 08.01.0033 100 g yenilebilir kısım (Kavun, yazlık, çitili kavun, Kantalop) accessed: 2026-08-15
- TürKomp — Ulusal Gıda Kompozisyon Veri Tabanı 08.01.0032 100 g yenilebilir kısım (Kavun, kışlık Kırkağaç) accessed: 2026-08-15
- TÜBER 2022 — Türkiye Beslenme Rehberi Ek 2.1.9, s. 270 1 standart porsiyon karpuz = 9 × 6 × 2 cm 3 üçgen dilim / 150 g (porsiyon tanımı) accessed: 2026-08-15
General information notice. This content is prepared to support general nutrition literacy; it does not replace medical diagnosis or treatment and is not personal nutrition advice. A plan tailored to you can only be prepared by a licensed dietitian; if you are pregnant, have a chronic condition, take regular medication, are feeding a child, or have a clinical condition, a physician and dietitian check is required before starting a plan.
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