Restaurant Food Waste Calculator
Log one week of waste — item, quantity, reason, and estimated cost — and see exactly what spoilage, over-prep, and plate waste cost you every month and every year.
RestroScout is reader-supported and independent. Some links to software are affiliate links, which may earn us a commission at no extra cost to you. This calculator projects from the figures you enter and does not use industry benchmarks or constitute financial advice.
Your week of waste
Add one row per item you threw out. Estimates are fine.
Tip: a clipboard by the bin or a shared note on a tablet is enough to capture a week. The free inventory spreadsheet template pairs naturally with this log.
Want the bigger picture?
This tool isolates what waste alone costs you. To see waste, overstock, and shrinkage against your overall food cost percentage, use the full food cost & waste calculator.
Turn the audit into a habit
Once you know what waste costs, inventory software keeps it from creeping back — tracking variance, par levels, and spoilage automatically. Compare the top platforms for restaurants.
New to this? Read the 7-day food waste audit for the full method — the three types of waste, the copy-ready 6-column log, and how to turn the data into recovered margin.
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Frequently Asked Questions
How do I calculate restaurant food waste?
Keep a simple log for one typical week. For every item you throw out, record what it was, how much, why it was wasted, and your best estimate of its cost. Add up the weekly cost, then multiply to project the monthly and annual figure. This calculator does the projection for you from the lines you enter.
How does this calculator project monthly and annual cost?
It sums the estimated cost of every line you log for one week, then multiplies the weekly total by about 4.33 (52 weeks divided by 12 months) for the monthly figure and by 52 for the annual figure. The projection only reflects the numbers you enter — there are no industry averages or benchmark assumptions baked in.
What should I track in a food waste log?
Six columns are plenty: item, quantity wasted, reason, staff shift, supplier batch, and estimated cost. This tool focuses on item, reason, and estimated cost because those drive the dollar projection, but the reason column is the most valuable — it sorts every entry into spoilage, over-prep, or plate waste so you know which fix to make first.
How accurate do my cost estimates need to be?
Rough is fine to start. The goal is to make waste visible and rank the biggest offenders, not to produce perfect accounting. Even ballpark figures reveal which items and which type of waste are costing you the most, which is where you should focus first.
What do I do with the result?
Sort by the biggest offenders and the largest reason category, then attack the top lines first — usually tighter par levels and rotation for spoilage, better forecasting for over-prep, and portion or menu changes for plate waste. Re-run the log after a few weeks to confirm the loss is actually shrinking.