How to Use the Lunchbox Cost Calculator
Packing your own lunch is widely recommended as a money-saving habit, but how much do you actually save? This calculator lets you input each ingredient's purchase price, total package size, and the portion you used, so you get the real per-meal ingredient cost — not just a rough estimate.
For example, if a dozen eggs costs $3 and you used 2, that's $0.50. A cup of cooked rice from a 5-lb bag ($4) costs roughly $0.20. A 6-oz chicken breast from a $9 pack adds $1.80. Add some vegetables and condiments and your total might come to just $3–$5, compared to $12–$15 for a restaurant lunch. Over 22 workdays, that's $150–$200 back in your pocket every month.
Enter the eating out cost and monthly frequency to see your estimated monthly savings. You can also add a line item for cooking costs or container costs if you want a fully loaded estimate.
Frequently Asked Questions
Use whatever unit makes sense for that ingredient — ounces, grams, cups, or count. Just make sure the "amount used" is in the same unit. For eggs, enter package count (e.g., 12) and used count (e.g., 2).
You can add them as separate line items with small amounts, or lump them together under "Condiments" with an estimated total. Their per-serving cost is usually very small, so precision matters less here.
This calculator covers ingredient cost only. The time cost of meal prep is real but subjective — use it as a separate consideration when deciding whether packing lunch makes sense for you.