Plan your weekly meal prep — calculate servings, macros, prep time, and shopping quantities for your whole week.
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Meal prepping — preparing meals or ingredients in advance — is one of the most effective strategies for eating healthily, saving money, and reducing daily decision fatigue. Research published in the International Journal of Behavioral Nutrition and Physical Activity found that people who meal prep consume more fruits and vegetables, have higher diet quality, and are less likely to be overweight than those who do not plan their meals.
The financial case is equally compelling. The average American spends $3,000–$5,000 per year on restaurants and takeout. A well-planned meal prep routine can cut food costs by 50–70%, saving $1,500–$3,500 annually. A typical home-cooked meal costs $4–$6 per serving; the equivalent restaurant meal costs $15–$25.
The most efficient meal prep system follows five steps: (1) Plan your meals for the week based on your calorie and macro targets; (2) Shop with a single weekly grocery run using a categorised list; (3) Batch cook proteins, grains, and vegetables in parallel to minimise total kitchen time; (4) Portion into containers immediately after cooking; (5) Store correctly — most prepped meals last 4–5 days in the refrigerator and 3 months in the freezer.
| Food Type | Refrigerator | Freezer |
|---|---|---|
| Cooked chicken/turkey | 3–4 days | 4 months |
| Cooked beef/pork | 3–4 days | 3 months |
| Cooked fish | 3–4 days | 3 months |
| Cooked grains (rice, quinoa) | 5–7 days | 6 months |
| Roasted vegetables | 3–5 days | 10–12 months |
| Soups & stews | 3–4 days | 4–6 months |
| Overnight oats | 5 days | Not recommended |
The Meal Prep Calculator is a free online tool that helps you plan your weekly meals, calculate ingredient quantities for batch cooking, and estimate the total calories and macronutrients for each prepared meal. Meal prepping is one of the most effective strategies for maintaining a healthy diet, saving money, and reducing the daily decision fatigue of 'what should I eat?'. This calculator takes the guesswork out of meal prep by giving you precise quantities for any number of servings.
Enter the number of people you are meal prepping for and the number of days.
Select your meals: breakfast, lunch, dinner, and snacks for each day.
Enter the ingredients and quantities for each meal recipe.
The calculator scales all ingredient quantities to your required number of servings.
Review the total shopping list with consolidated quantities for each ingredient.
Use the nutrition summary to verify your weekly calorie and macro targets are met.
Meal prepping — preparing meals or meal components in advance — offers significant benefits for health, finances, and time management. The primary health benefit is dietary consistency: when healthy food is already prepared and ready to eat, you are far less likely to reach for convenience food or order takeaway. Research shows that people who meal prep eat more vegetables, consume fewer calories, and have better diet quality than those who cook from scratch daily.
Financially, meal prepping saves money in two ways: buying ingredients in bulk is cheaper per serving than buying for individual meals, and prepared meals eliminate the temptation to buy expensive convenience food or eat out. The average UK household spends £2,500+ per year on eating out and takeaways — meal prepping can reduce this significantly.
Time-wise, the initial investment of 2–3 hours on a Sunday afternoon saves 30–45 minutes of daily cooking and decision-making throughout the week. The cognitive benefit of not having to decide what to eat every day is also significant — decision fatigue is real, and eliminating food decisions frees mental energy for more important choices.
Starting meal prep can feel overwhelming, but the key is to begin simply and build complexity gradually. Start with just one meal category — lunches are the most impactful for most people, as they are the meal most likely to be replaced by expensive convenience food.
Choose 2–3 recipes that share common ingredients to minimise shopping and maximise efficiency. For example, a base of roasted vegetables and grains (quinoa, rice, or pasta) can be combined with different proteins and sauces to create variety throughout the week without cooking multiple completely different meals.
Invest in quality food storage containers — glass containers are preferable for reheating and do not absorb odours. Label each container with the meal name and date prepared. Most cooked meals keep safely in the refrigerator for 4–5 days and in the freezer for 3 months. Batch cooking proteins (chicken, mince, eggs) and grains at the start of the week provides the most flexibility for assembling different meals throughout the week.
Sunday afternoon is the most popular meal prep time — the week ahead is clear, shops are open, and you have time to cook without rushing. Aim to have all lunches and at least 3 dinners prepared by Sunday evening.
Glass containers with airtight lids are the best investment for meal prepping. They are microwave-safe, do not absorb odours, and last for years. Uniform containers stack efficiently in the fridge and freezer.
Never shop without a list based on your planned meals. Impulse purchases are the enemy of meal prep budgets. Calculate exact quantities needed and buy only what is on the list.
Cooking proteins (chicken, mince, tofu) and grains (rice, quinoa, pasta) separately and combining them differently each day creates variety without extra cooking. This component prep approach is more flexible than making complete dishes.
Allow cooked food to cool to room temperature (no more than 2 hours) before refrigerating. Putting hot food directly in the fridge raises the temperature of surrounding food and can cause bacterial growth.
Label every container with the meal name and date prepared. This prevents food waste from forgotten containers and ensures you eat meals in the correct order (oldest first).