Free Online Calculators
No signup. Fast browser-based results with clear formulas and examples.
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Most Popular Mortgage Calculator
Monthly payment, total interest, amortization schedule.
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Finance Salary Calculator
Take-home pay after federal and state taxes.
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Health BMI Calculator
Body mass index and healthy weight range.
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Health Due Date Calculator
Estimated pregnancy due date and week-by-week milestones.
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Finance Calculators
Methodology →Stock & ETF Calculators
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Stock Average Cost
New average share price after buying more.
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Averaging Down
Break-even after adding to a lower-priced position.
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Stock Return
Profit, loss, and return percentage after costs.
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Dividend Calculator
Annual and after-tax dividend income.
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Dividend Yield
Yield from share price and annual dividend.
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Foreign Stock FX Return
Stock return including exchange rate movement.
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ETF Recurring Investment
Future value from monthly ETF investing.
AI Cost Calculators
Health Calculators
Math & Utility
✓ 100% free, no account needed ✓ Calculations run in your browser ✓ Updated for 2026 tax rates ✓ Mobile-friendly
Featured Guides
All articles → Health 8 min read
What Is a Healthy BMI?
What BMI means, how the categories work, and when body mass index needs extra context.
Health 8 min read
How Many Calories Should I Eat Per Day?
Use TDEE to estimate maintenance calories, fat-loss targets, and a realistic starting point.
Math & Utility 7 min read
How to Calculate Exact Age
Learn how years, months, and days are calculated from a birth date without manual guesswork.
Health 8 min read
How to Calculate Your Due Date
Naegele's Rule, ultrasound dating, IVF methods, and the 40-week timeline explained.
Questions or corrections? About· Methodology· golreas@gmail.com