Compute the greatest common divisor (Euclidean algorithm) and least common multiple of two positive integers. Also reports whether the two numbers are coprime (GCD = 1).

Convert arcseconds to turns (angle). Pass ?value=N.

Convert arcminutes to turns (angle). Pass ?value=N.

Convert arcseconds to gradians (angle). Pass ?value=N.

Compute combinations C(n, r) or permutations P(n, r) using BigInt for exact arbitrary-precision results. Returns the result as a string (since values can exceed Number.MAX_SAFE_INTEGER) and a human-readable formula.

Standard matrix multiplication of two 2D arrays: A[m×k] × B[k×n] → C[m×n]. Validates that inner dimensions match. Each dimension is capped at 100.

Convert arcminutes to radians (angle). Pass ?value=N.

Convert arcseconds to radians (angle). Pass ?value=N.

Convert arcseconds to degrees (angle). Pass ?value=N.

Convert arcminutes to gradians (angle). Pass ?value=N.

Convert arcminutes to arcseconds (angle). Pass ?value=N.

Convert hertz to kilohertz (frequency). Pass ?value=N.

Convert turns to arcminutes (angle). Pass ?value=N.

Convert temperature from rankine to kelvin. Pass ?value=N.

Convert temperature from kelvin to fahrenheit. Pass ?value=N.

Convert temperature from kelvin to rankine. Pass ?value=N.

Convert kilohertz to rpm (frequency). Pass ?value=N.

Convert temperature from kelvin to celsius. Pass ?value=N.

Convert gigahertz to megahertz (frequency). Pass ?value=N.

Convert megahertz to hertz (frequency). Pass ?value=N.