Roman Numeral Converter
Convert numbers to Roman numerals or Roman numerals back to numbers instantly. Type a year like 2026 to…
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Sleep Calculator
Suggest bedtimes from wake hour, wake minute, and minutes to fall asleep.
Use calculatorFactor Calculator
List all positive factors (divisors) of a positive integer.
Use calculatorGCF Calculator
Find the GCF (HCF/GCD) of two or more numbers with prime-factor and Euclidean steps, plus LCM.
Use calculatorExponent Calculator
Calculate a base raised to an exponent power.
Use calculatorCircle Calculator
Calculate circle area from a radius using πr².
Use calculatorPythagorean Theorem Calculator
Solve one missing side of a right triangle using the Pythagorean theorem.
Use calculatorRetirement Calculator
Project retirement balance from savings, monthly contributions, return rate, and years.
Use calculatorLean Body Mass Calculator
Estimate lean body mass from weight (kg), height (cm), and sex.
Use calculatorBinary Calculator
Convert binary and decimal values or add two binary numbers.
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