Half and Half vs Mayonnaise
Side-by-side macro comparison. Half and Half vs Mayonnaise per their standard serving sizes.
Macro Comparison Table
| Macro | Half and Half | Mayonnaise | Difference |
|---|---|---|---|
| Calories | 20 cal | 94 cal | -79% Half |
| Protein | 0.4g | 0.1g | +300% Half |
| Carbs | 0.6g | 0.1g | +500% Half |
| Fat | 1.7g | 10g | -83% Half |
Differences shown relative to Half and Half. Positive = Half and Half has more.
Quick Take
Half and Half delivers 20 calories per serving with 0.4g protein, 0.6g carbs, and 1.7g fat. Mayonnaise delivers 94 calories with 0.1g protein, 0.1g carbs, and 10g fat. The most meaningful difference: Half and Half saves 74 calories per serving — meaningful over a week of meals. Both deliver similar protein density.
When to Pick Each
For Cutting / Weight Loss
When cutting on a tight calorie budget, Half and Half gives you 74 more calories of headroom per serving — that's room for an extra snack, more vegetables, or a higher-protein second portion. If protein density matters more (which it does for preserving muscle on a deficit), Half and Half delivers more grams of protein per calorie consumed.
For Bulking / Muscle Gain
For muscle gain, you want calories AND protein. Mayonnaise brings 94 calories — useful when you're chasing a surplus and struggling to eat enough. Half and Half delivers 0.4g of protein per serving, which directly feeds muscle protein synthesis. The best pick depends on whether you need more total calories or more usable protein.
For Keto / Low-Carb
Both Half and Half and Mayonnaise are keto-friendly with under 10g carbs per serving.
Frequently Asked
Which has more protein, Half and Half or Mayonnaise?
Half and Half has more protein: 0.4g vs 0.1g per serving. That's a difference of 0.30000000000000004g.
Which has fewer calories, Half and Half or Mayonnaise?
Half and Half has 20 calories per serving vs 94 calories in Mayonnaise — a difference of 74 calories.
Is Half and Half or Mayonnaise better for keto?
Mayonnaise is the better keto choice at 0.1g carbs per serving vs 0.6g carbs in Half and Half.
Is Half and Half or Mayonnaise better for weight loss?
For weight loss, Half and Half gives you more calorie flexibility (74 cal less per serving). For preserving muscle during a deficit, Half and Half delivers more protein per calorie. Most people on cuts benefit from Half and Half.
Which Is Better for Your Goal?
🔥 Weight Loss
Half and Half
Higher protein-to-calorie density + lower absolute fat = more satiety per calorie.
💪 Muscle Gain
Half and Half
Higher absolute protein per serving better supports muscle protein synthesis.
🥑 Low-Carb / Keto
Mayonnaise
Lower carbohydrate content fits keto and low-carb macros without burning your carb budget.
Both fit most balanced diets. These verdicts reflect macro-only comparisons — taste, satiety, cost, and personal preference also matter.
Find Your Personal Macros
The "right" food depends on your individual macro targets. Calculate yours in 60 seconds:
→ Calculate My Macros (Free)Related Comparisons
Other ways Half and Half and Mayonnaise stack up:
Full Half and Half guide • Full Mayonnaise guide • All comparisons