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Calcimator

Meal Prep Cost Calculator

Calculate how much meal prepping saves vs eating out. See cost per serving, weekly savings, and annual savings.

About this calculator

This calculator reduces meal prepping to its real economic comparison: what a single serving actually costs you to make, against what you'd pay to buy an equivalent meal out. It first sums your protein, vegetable, and grain costs for one cooking batch, then divides that batch cost by how many servings the batch yields to get a true per-serving price — the number that matters when you're deciding whether prepping is worth the time investment. Weekly prep cost multiplies that per-serving figure by how many prepped meals you actually plan to eat that week and adds your container costs on top, since reusable or disposable containers are a real recurring expense that a simple per-ingredient tally would miss.

Savings — weekly, monthly, and projected annually — come from comparing that total against what the same number of meals would cost at your entered average restaurant or takeout price, with monthly figures using the standard 4.33-weeks-per-month averaging (52 weeks divided by 12 months) rather than a flat 4-week assumption that would understate real monthly totals. The cumulative comparison chart projects both costs forward across twelve months, which makes the compounding effect of even a small per-meal savings visible in a way a single weekly number doesn't. The model assumes consistent habits — the same batch size, ingredient costs, and meal count every week — so a real month with grocery price swings, skipped prep days, or occasional takeout will land somewhere around this projection rather than exactly on it.

Monthly Savings

$229.49

Inputs

$
$
$
$
$

Comparison

Cost per Serving (Prep)

$4.00

Weekly Prep Cost

$22.00

Annual Savings

$2,753.88

Savings Percentage

71%

How to Use This Calculator
  1. Enter the number of prepped meals you plan to eat each week and servings per cook session.
  2. Input the cost of protein, vegetables, and grains/sides for one batch, plus your weekly container cost.
  3. Enter your average cost for a single restaurant or takeout meal for comparison.
  4. The calculator shows cost per serving, weekly prep cost, monthly savings versus eating out, and annual savings.
  5. Adjust ingredient costs or meal counts to see how menu changes affect your budget.

How the result changes with Avg Eating Out Cost

Avg Eating Out CostMonthly Savings
$7.50$67.11
$11.00$142.89
$23.00$402.69
$38.00$727.44

What each input means

Meals per Week
How many prepped meals you plan to eat each week
Servings per Cook
Number of individual servings each cooking session produces
Protein per Batch
Cost of meat, tofu, or other protein for one batch of meals
Vegetables per Batch
Cost of vegetables and produce for one batch of meals
Grains/Sides per Batch
Cost of rice, pasta, bread, or other sides for one batch
Containers (Weekly)
Weekly cost of disposable or replacement meal prep containers
Avg Eating Out Cost
Average cost of one restaurant or takeout meal for comparison

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Meals per Week = 5, Servings per Cook = 4, Protein per Batch = 8, Vegetables per Batch = 5 = 7 input(s) provided
  2. Calculate Monthly Savings
    Monthly Savings
    229.49 = $229.49
  3. Calculate Cost per Serving
    Cost per Serving
    4 = $4
  4. Calculate Weekly Prep Cost
    Weekly Prep Cost
    22 = $22

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators. Built by Paul Gunder, a software engineer, not a licensed financial, medical, or legal professional.

Frequently Asked Questions

Why does the calculator divide the batch cost by servings instead of just using ingredient totals?

A batch of ingredients typically yields multiple servings, and the real cost comparison against eating out has to be per meal, not per batch — otherwise you'd be comparing the price of an entire week's worth of protein against a single restaurant dish. Dividing by servings per cook session converts the raw grocery cost into the same per-meal unit as the eating-out comparison price.

Why is the monthly figure 4.33 times the weekly figure instead of exactly 4 times?

A year has 52 weeks but only 12 months, so an average month is actually about 4.33 weeks long (52 divided by 12), not a flat 4. Using exactly 4 would systematically understate monthly and annual totals by roughly 8%, since it effectively drops about three extra weeks' worth of costs and savings over a full year.

Does the calculator account for cooking time, only ingredient and container costs?

Only the financial side — ingredient costs for protein, vegetables, and grains, plus containers — is included; the value of your own time spent shopping, cooking, and packing meals isn't factored into the comparison. If your time has a real opportunity cost, the true savings from meal prepping may be smaller than the dollar figure shown once that time is accounted for.

How reliable is the annual savings projection if my habits change week to week?

The annual figure simply extrapolates one week's numbers out across 52 weeks, so it assumes consistent batch size, ingredient prices, and meal counts throughout the year. Real spending typically varies with seasonal produce prices, occasional takeout on busy weeks, or changing recipes, so treat the annual number as a best-case estimate under steady habits rather than a guaranteed outcome.

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