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Free online calculators for finance, health, math, and everyday life. Fast, accurate, and no sign-up required.
Hours of Life Calculator
See how many hours of work your purchases really cost. Transform the way you think about money forever.
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InteractiveFree IQ Test
QuizTake our comprehensive 40-question IQ test measuring verbal, numerical, spatial, pattern recognition, and working memory abilities. Get your estimated IQ score instantly - completely free, no signup required.
Subscription Health Audit
QuizFind out if you're overspending on subscriptions. Get your subscription health score and personalized recommendations.
Budget Health Audit
QuizAssess your financial health with our 10-question budget audit. Get your budget score, identify weak spots, and receive personalized tips to improve.
Year-End Financial Checklist
ChecklistComplete your year-end financial review. Maximize tax savings, optimize retirement contributions, and prepare for the new year.
How Much House Can I Afford?
GuideAnswer a few simple questions about your income, debts, and savings to get a personalized home affordability estimate with conservative, moderate, and stretch options.
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Calculators for building materials, measurements, and construction projects.
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Assess your finances
Interactive financial audits to identify spending leaks and improvement areas.
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Year-end tax prep, home buying, quarterly taxes, and more financial checklists.
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Side-by-side comparisons: EV vs Gas, Rent vs Buy, and more decision tools.
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In-depth guides on financial topics, formulas, and calculator explanations.
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Frequently Asked Questions
Yes! All calculators on CalculatorJar are completely free to use with no sign-up required. We believe everyone should have access to accurate calculation tools for their daily needs.
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