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Freelance

Rate calculator, invoicing, tax, hourly vs project, expenses, contract types.

Rates, invoicing, taxes, expenses, contracts.

Calculators

Step-by-step calculators with formulas, examples, and FAQs.

Generators, converters, and utilities — all client-side.

Reference tables: standards, codes, sizes, conversions.

Quizzes and drills to test and build your knowledge.

Unit conversions across length, weight, volume, and more.