Food and nutrition
Macro calculators, batch-cooking scalers, cost-per-container math, and high-protein meal prep plans with tested storage guidance.
No sign-up. No data leaves your browser. Updated 2026.
Each tool includes a worked methodology, assumptions, and common pitfalls below the numbers.
Enter sex, age, height, weight, activity, and goal to estimate BMR, TDEE, a calorie range, and grams of protein, carbs, and fat per meal.
Open calculator → Food safetyLook up safe refrigerator and freezer storage days for 20+ common meal prep staples, check danger zone temperature rules, and get safe reheating instructions.
Open calculator → Meal prepEnter target containers and base recipe quantities to scale raw ingredient weights, compute exact per-box protein, carb, fat, and calories, and calculate cost per meal.
Open calculator →Practical walkthroughs with the math shown, not just conclusions.
The definitive food safety guide to meal prep storage limits, cooling protocols, the 40°F danger zone, and when to freeze weekly meals.
Read the guide →A streamlined, step-by-step assembly line system to cook and pack five days of high-protein lunches and dinners in under 90 minutes.
Read the guide →Solve the macro tracking dilemma: raw meat nutrition labels vs cooked container weights, moisture loss math, and scale taring techniques.
Read the guide →Four proven culinary techniques to reheat refrigerated chicken breast while locking in moisture, including steam covers and microwave power levels.
Read the guide →Comparing borosilicate glass meal prep containers against BPA-free plastic: microplastics, microwave safety, freezer longevity, and weight.
Read the guide →How to purchase, portion, and prep 150 grams of complete protein every day for less than five dollars using affordable whole food staples.
Read the guide →Calorie-targeted weekly plans with per-container macros, grocery lists, and cost estimates for different diets and budgets.
Every calculator on BatchMacro is deterministic: the same inputs always produce the same output, and the formula is documented in plain language on the tool page. Where a figure depends on an external benchmark — a published rate, a statutory limit, or an industry cost range — the page cites the publisher and links to it.
We separate inputs you control (balances, rates, dimensions, weights) from assumptions we supply (default rates, waste factors, contingency percentages). Assumption defaults are deliberately conservative and every one of them is editable on the tool page, so you can substitute your own quote or local figure.
Nothing you type is transmitted. The calculations execute in JavaScript in your browser, which means the tools work offline and no personal data is collected.