Lowest-Calorie Firehouse Subs Meals (2026): Every Item Ranked

The lowest-calorie item at Firehouse Subs (above a few calories) is Coke Zero w/ Cherry Vanilla, 22 fl oz, at 5 calories. 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.

Lowest-calorie items at Firehouse Subs (US menu)

Ranked from fewest calories upward, with protein, carbs, and fat for each item:

#	Item	Category	Calories	Protein (g)	Carbs (g)	Fat (g)
1	Coke Zero w/ Cherry Vanilla, 22 fl oz	Beverages	5	0	0	0
2	Coke Zero w/ Cherry, 22 fl oz	Beverages	5	0	0	0
3	Caffeine Free Diet Coke w/ Cherry Vanilla, 22 fl oz	Beverages	5	0	0	0
4	Caffeine Free Diet Coke w/ Cherry, 22 fl oz	Beverages	5	0	0	0
5	Caffeine Free Diet Coke w/ Raspberry, 22 fl oz	Beverages	5	0	0	0
6	Caffeine Free Diet Coke w/ Vanilla, 22 fl oz	Beverages	5	0	0	0
7	Coke Zero w/ Raspberry, 32 fl oz	Beverages	5	0	0	0
8	Coke Zero w/ Vanilla, 22 fl oz	Beverages	5	0	0	0
9	Dasani Sparkling Lemon Lime Seltzer Water, 22 fl oz	Beverages	5	0	0	0
10	Dasani w/ Cherry, 32 fl oz	Beverages	5	0	1	0
11	Dasani w/ Grape, 32 fl oz	Beverages	5	0	1	0
12	Dasani w/ Lime, 32 fl oz	Beverages	5	0	1	0
13	Dasani w/ Raspberry, 32 fl oz	Beverages	5	0	1	0
14	Dasani w/ Strawberry, 32 fl oz	Beverages	5	0	1	0
15	Diet Coke w/ Cherry Vanilla, 22 fl oz	Beverages	5	0	0	0
16	Diet Coke w/ Cherry, 22 fl oz	Beverages	5	0	0	0
17	Diet Coke w/ Raspberry, 22 fl oz	Beverages	5	0	0	0
18	Diet Coke w/ Vanilla, 22 fl oz	Beverages	5	0	0	0
19	Diet Fanta Vanilla, Specialty, 22 fl oz	Beverages	5	0	0	0
20	Fanta Zero Orange, 32 fl oz	Beverages	5	0	1	0
21	Fanta Zero Orange, 44 fl oz	Beverages	5	0	2	0
22	Fruitwater Fizzy Cherry-Lime, 12 fl oz	Beverages	5	0	0	0
23	Fruitwater Fizzy Lemonade, 44 fl oz	Beverages	5	0	0	0
24	Fruitwater Fizzy Peach Lemonade, 32 fl oz	Beverages	5	0	1	0
25	FUZE Diet Peach Tea, 12 fl oz	Beverages	5	0	0	0
26	FUZE Diet Raspberry Peach Tea, 12 fl oz	Beverages	5	0	0	0
27	FUZE Diet Tea, 22 fl oz	Beverages	5	0	0	0
28	FUZE Unsweetened Tea, 22 fl oz	Beverages	5	0	0	0
29	Mello Yello Zero Orange, 32 fl oz	Beverages	5	0	1	0
30	Mello Yello Zero Orange, 44 fl oz	Beverages	5	0	2	0

Track restaurant meals with Nutrola

Restaurant portions are easy to underestimate, and the calories add up fast. Nutrola is an AI calorie tracker built on a 1.8M+ RD-verified food and restaurant database, so you can check a menu item before you order. Log a meal by photo or by voice and you will see how it fits into your day.

Source and method

These figures come from Nutrola's 1.8M+ RD-verified food and restaurant database and reflect the US menu of Firehouse Subs, so portion sizes and recipes can differ in other countries. Values are per item as served and are indicative, since menus and recipes change over time.

Frequently asked questions

What is the lowest-calorie item at Firehouse Subs?

Coke Zero w/ Cherry Vanilla, 22 fl oz is among the lowest at 5 calories on the US menu.

What can I eat at Firehouse Subs on a diet?

Pick from the lowest-calorie items above, favour grilled proteins and salads, and watch dressings, sauces, and sugary drinks, which add calories quickly.

Does Firehouse Subs have low-calorie options?

Yes. The ranking above lists 30 items under the chain's lighter end, including sides and drinks alongside mains.

Summary

For a lighter choice at Firehouse Subs, start with Coke Zero w/ Cherry Vanilla, 22 fl oz at 5 calories. Log it in Nutrola to keep the rest of your day on track.