19 categories · 1,668 tools
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Live counts from the catalog, largest collections first.
Math & Science315Algebra, calculus, chemistry, physics, and statistics.Finance & Housing194Mortgages, loans, retirement, and real estate math.Fitness & Lifestyle121BMI, calories, PTO, and everyday planning.Business & Marketing99Fees, ads, inventory, and growth metrics.Conversion98Units, cooking measures, and everyday converters.Home Services & Cost96Remodel, flooring, electrical, and contractor estimates.DIY, Outdoors & Hobbies95Build, garden, sports, and project math.Payroll & Taxes94Paychecks and state-specific withholding tools.Medical & Health87Clinical scores, dosage, and health metrics.Legal & Compliance77Support, deadlines, settlements, and filings.Education & GPA74GPA, AP scores, and academic planning.Food74Recipes, yields, brewing, and kitchen conversions.Logistics & Transportation59Shipping, fuel, CBM, and moving estimates.Energy & Sustainability55Solar, insulation, EV charging, and savings.Accessibility & Ergonomics52Monitor height, contrast, and workplace fit.Programming40Units, encoding, CSS, and developer utilities.Size & Spacing36TV height, curtains, lighting, and room layout.
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