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The Fennec Lab

Hospitality operator economics

Restaurant Operations Calculators

Operator economics for full-service and quick-service restaurants — prime cost ratios, FLSA tip-credit math, and the P&L diagnostics that decide whether a shop is healthy, at risk, or unprofitable against National Restaurant Association benchmarks.

Anchored to: 29 USC § 203(m); NRA Restaurant Industry Forecast benchmarks; 29 CFR § 531

10 calculators live. Reviewed against current statute and regulation. Last updated 2026-05-16.

Most-used calculators

National Restaurant Association industry benchmarks (annual Restaurant Industry Forecast)

Restaurant Prime Cost Calculator

Compute restaurant prime cost — the monthly operating ratio of food and beverage cost-of-goods-sold plus total labor cost (hourly wages, salaried management, payroll taxes, and benefits) divided by total sales. Surfaces the National Restaurant Association industry benchmarks: under 60% healthy, 60-65% at-risk, over 65% unprofitable. Factors in FLSA tip-credit rules under 29 USC § 203(m), state-minimum-wage variation across all 50 states plus DC, and the seven no-tip-credit jurisdictions (CA, OR, WA, NV, MN, MT, AK). Reports food-cost percent, labor-cost percent, prime-cost percent, status against industry targets, and the required monthly sales lift to return to the 60% healthy target.

Kasavana

Menu Engineering Calculator (Stars, Plowhorses, Puzzles, Dogs)

Classify every menu item using the Kasavana and Smith menu-engineering framework. Inputs per item are food cost, sell price, and units sold during the analysis period. The calculator computes contribution margin (CM) per item, popularity index (item units divided by the mean), and profitability index (item CM divided by the mean), then classifies each item into one of four quadrants — STAR (high popularity, high margin), PLOWHORSE (high popularity, low margin), PUZZLE (low popularity, high margin), or DOG (low popularity, low margin) — using the 70% popularity benchmark and the mean CM profitability benchmark. Reports total revenue, total food cost, total CM, overall food-cost percentage, quadrant distribution, and a recommended action per quadrant.

Standard restaurant cost-accounting methodology (Pavesic

Recipe Cost / Plate Cost Calculator

Compute per-serving plate cost from an ingredient list with AP-to-EP yield conversion. Inputs per ingredient are name, cost per AP unit (what the vendor charges), used quantity, and yield percentage (the fraction of the AP weight that ends up on the plate after trim, peel, bone, and shrinkage). The calculator converts each AP cost to an EP cost by dividing by yield, sums the contributions, divides by recipe yield in servings to produce per-serving cost, and applies a target food-cost percentage to suggest a menu price. Reports total recipe cost, cost per serving, suggested menu price, profit per cover (contribution margin), and the achieved food-cost percentage at the suggested price.

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For LCAMs & community managers

Operational tools for the day-to-day: estoppel preparation, statutory cap verification, hearing procedure.

For unit owners

Verify a notice, check a fine, or understand the lien exposure on a delinquent account before acting.

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100+

Calculators live

Across statute, regulation, and policy

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Statute-cited

Every formula links its source

4,000+

Unit tests

Every formula has a regression suite

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Formula transparency

Deterministic math, no hidden weights

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How these calculators are maintained

Every YMYL calculator is reviewed quarterly and after every legislative session in the jurisdiction it covers. Citations are link-validated monthly against the relevant statute and regulation websites. The methodology page documents the discipline.

Read the editorial methodology →

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