Discover how to choose healthier meals at Firehouse Subs with calorie-conscious subs, salads, and smart customization tips for balanced eating on the go. Looking for healthy options at Firehouse Subs? Our 2026 guide details the best low-calorie subs, salads, and customization hacks to eat well and feel great. Learn how to choose lower-sodium, higher-fiber, and balanced Firehouse Subs options—review nutrition labels, customize wisely, and avoid hidden calories or excess sodium. If you're watching your calories, Firehouse Subs has at least 280 low calorie options to choose from, according to the nutrition information they provide on their website. For more low calorie choices at Firehouse Subs, see the full low calorie menu below. The table below ranks the 30 lowest-calorie items on the US menu, with protein so you can find filling, lighter options. The list includes sides and drinks as well as mains. Order Firehouse Subs online for pickup, delivery, or catering. Find locations, explore the menu, and earn rewards. All 40 low calorie menu items at Firehouse Subs (US), ranked with full calorie and macro breakdowns. Updated 2026. We’ll uncover the best low-calorie Firehouse Subs choices, explore the detailed Firehouse Subs nutrition facts, and give you actionable tips to customize any sub to fit your health goals. The lowest-calorie and highest-protein items at Firehouse Subs, with full macros for 162 menu items. Find the best Firehouse Subs order under your calorie cap. At Firehouse, go chopped salads with grilled chicken or small turkey-based subs, keep sauces on the side, and double the veggies. You’ll get the smoky-savory Firehouse taste and still crush your macros.