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Meal Prep Quantity Calculator

Calculate exact ingredient quantities for meal prepping. Enter servings, meals per day, and days to prep.

📅 Updated April 2026 Formula verified 📖 4 min read 🆓 Free · No sign-up

How to Calculate Meal Prep Quantities

Total meals = People × Meals/day × Days. For 2 people, 3 meals/day, 5 days: 30 meals. Then multiply by your portion size per component: 5 oz protein × 30 meals = 150 oz (9.4 lbs) of protein needed. This eliminates the guesswork that causes either running out mid-week or wasting food. Always prep slightly more (10%) to account for varied appetite days.

Meal Prep Cost Savings

Average meal prep cost: $3-5 per meal. Average restaurant meal: $12-18. Average takeout: $10-15. Meal prepping 3 meals/day for one person saves approximately $200-400/month compared to eating out. For a couple, savings are $400-800/month. The upfront time investment (2-3 hours on Sunday) pays for itself many times over in both money and weekday convenience.

⚡ CalcWolf Insight

The #1 meal prep failure reason is boredom — eating the same chicken-rice-broccoli for 5 days straight. The fix: prep 2-3 different proteins and 3-4 different sauces/seasonings. Same base ingredients, completely different flavors each day. Variety prevents burnout without adding significant prep time.

Frequently asked questions
How much food do I need for a week of meal prep?
For one person eating 3 meals/day for 5 days (15 meals): approximately 4.5 lbs protein, 4 lbs carbs/grains, 4 lbs vegetables. Total: ~12-13 lbs of food, costing $45-75 in groceries. This averages $3-5 per meal — 3-4x cheaper than eating out.
How long does meal prep food last in the fridge?
Most meal prepped food lasts 3-5 days refrigerated. For a full week of prep, freeze meals for days 4-7 and thaw overnight as needed. Cooked chicken lasts 3-4 days, rice 4-6 days, most cooked vegetables 3-5 days. When in doubt, prep twice per week (Sunday + Wednesday).
✓ Math logic verified against primary sources → See our verification process
Kevin Glover
Founder, CalcWolf · GLVTS · Blickr
All formulas sourced from primary references — IRS publications, peer-reviewed research, and official standards. Results are tested against independent reference calculators before publishing. Rates and brackets updated when official sources change. Editorial policy →
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Found a bug or outdated data? Reports go directly to Kevin and are reviewed personally.