The numbers behind
every serious decision

Hyper-specific professional calculators for restaurant owners, contractors, and freelancers. Free, precise, built for operators.

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🍽️Food Cost Percentage CalculatorRestaurant
🔨Lumber Cost CalculatorConstruction
💼Freelance Hourly Rate CalculatorFreelance

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Construction

Concrete volume, roofing squares, exterior paint, deck framing, lumber board feet, beam sizing, built for contractors and estimators.

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Freelance

Minimum hourly rate, self-employment tax, project profit margin, and client lifetime value: for independent professionals.

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Restaurant

Food cost percentage, labor cost percentage, menu item pricing, and break-even: the four metrics every food business needs.

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How CalStack works

From question to answer in under 60 seconds

01

Find your calculator

Search by keyword or browse by category. Each calculator is hyper-specific, no generic tools that don't fit your situation.

02

Enter your numbers

Simple inputs pulled directly from your invoices, POS, or payroll. No accounting software required. Results appear instantly.

03

Get context with your answer

Every result includes industry benchmarks, what your number means, and specific actions to improve it. Not just a number: a decision.

Built differently

Why professional operators choose CalStack

Hyper-specific, not generic

Every calculator is built for one specific professional context. A restaurant food cost calculator uses restaurant benchmarks. A construction estimator uses contractor cost structures.

Benchmarks built in

Your result is compared against industry benchmarks sourced from professional associations and research institutes, so you always know whether your number is excellent, healthy, or a problem.

Content that explains the number

Every calculator includes a full professional article explaining the formula, industry context, and how to improve your result. Not just a number: a decision.

Trusted by serious operators

Restaurant owners, contractors, freelancers, and investors who make decisions by the numbers , every week.

PCA Painting standards
BLS Labor benchmarks
ACI Concrete standards
NRCA Roofing standards