Calculate what you would accumulate by prepping meals or packing lunches instead of paying premium restaurant prices.
$0 spent · $0 if invested
You don't have to swear off restaurants or pack a sad desk lunch to benefit from this math. What if every $10 you spend eating out in a day, you also invested another $10? You'd keep the convenience and the social time — and still be on track for the growth shown above. The real lever isn't deprivation; it's whether you're willing to match the spending with an equal amount of investing.
A quick lunch out costs more than the number on the receipt. It's easy to justify $15 for a workday meal — you were going to eat anyway, and cooking takes time you may not have. But work lunches and dinners out are usually the most frequent, least examined category of spending most people have, precisely because each individual purchase feels reasonable.
Five workday lunches at $15 each is $75 a week — about $11 a day averaged out, and not an unusual number for a lot of households. Left as ordinary spending, that's roughly $3,900 a year in direct cash outflow. Invested instead at a historical 8% market average, $10 a day becomes close to $55,600 after just 10 years. Hold that same habit across 30 years and it compounds to well over $450,000.
None of this means you should pack a sad desk lunch every day for the next three decades. Restaurant meals and takeout have real value: time saved, social connection, and simply not having to cook every single night. The goal of this calculator is the same as the others on this site — not to shame the spending, but to put a real number next to a habit that usually gets none.
Five $15 workday lunches a week averages about $11 a day, or roughly $3,900 a year in direct spending — before accounting for what that money could have become if invested instead.
Only you can weigh the time and convenience trade-off. What this calculator shows is the other side of that trade-off in dollar terms: $10 a day compounds to roughly $55,600 over 10 years at an 8% average return, so the question has a concrete number attached rather than a vague sense that it probably adds up.
It depends entirely on how much you currently spend eating out. Enter your own daily average in the slider above — the calculator recalculates instantly so you can compare your specific number instead of a generic average.
At an 8% average annual return, $10 a day compounds to roughly $453,300 after 30 years — a reminder that consistency and time matter more to the total than the size of any single meal.
Enjoy your day.