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Meatball Sub (Medium)
Meatball Sub (Medium) at Firehouse Subs has 834 calories, 37g protein, 59g carbs and 51g fat — sourced from Firehouse Subs Nutrition, not AI guesses. Medium white sub, beef-pork meatballs, marinara sauce, provolone.
At Firehouse Subs, the Meatball Sub (Medium) is a solid high-protein order. That works out to 4.4g of protein per 100 calories — 1g above the 36g Firehouse Subs average. Its macros land at roughly 18% of calories from protein, 28% from carbs and 55% from fat. Contains dairy, gluten, pork.
Source: Firehouse Subs Nutrition ↗, last verified Jun 17, 2026. Menus change periodically; values may vary by location. How we verify →
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