Firehouse Subs averages 708 calories an item against Whataburger's 346. Full side-by-side on calories and protein.
Published July 27, 2026 · Updated 36 minutes ago
Whataburger averages fewer calories per item — 346 against 708.
| Firehouse Subs | Whataburger | |
|---|---|---|
| Items tracked | 342 | 238 |
| Average calories | 708 | 346 |
| Lightest item | 16.9 oz Bottle Coke® Zero 0 cal | Jalapeños (whole or sliced – about 5-8 slices) 0 cal |
| Most protein | NEW Large Zesty Italiano Chicken Melt 1,400 cal | #3 Triple Meat Whataburger® 1,070 cal |
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