One cup of sliced cucumber (about 104 g) provides roughly 15 calories and is about 95% water, per USDA FoodData Central. Cucumbers are among the lowest-calorie foods — great for adding crunch and volume to meals without calories. Add to salads, sandwiches, or water; pair with hummus for a filling, low-cal snack.

Key facts:

  • 1 cup cucumber: ~15 kcal
  • ~95% water
  • Adds crunch, ~0 calories
  • Great with hummus