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F0X Finance · 385+ Calculators · 60+ Countries
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385+
Calculators
60+
Countries
0
Data stored
Free
Forever
US-based · updated annually with official data
Federal & state brackets with real-time breakdown
Monthly payment, amortization schedule, and total interest
Retirement savings growth with employer match
Monthly payments and total cost for any vehicle
Growth over time with reinvested returns
How long to reach your savings target
Country-independent tools — work the same everywhere
Exact age in years, months, and days from any birth date
Body Mass Index with WHO weight category
Find X% of any number — tips, discounts, tax
Count days between any two dates
Convert hours, minutes, and seconds to total time
Length, weight, temperature, and more
Local rates, official bracket data, and region-specific formulas
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Every formula is documented. Every data source is cited. No black boxes.
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