Calculators

Provides the constant speed of light in a vacuum (c) or calculates the speed of light in a medium using the index of refraction.

Calculates the focal length, object distance, or image distance for a thin lens using the thin lens equation: 1/f = 1/do + 1/di.

Calculates the factorial (n!) of a non-negative integer.

Calculates the sum of an arithmetic or geometric series.

Calculates the volume of various common 3D shapes (cube, sphere, cylinder, cone etc.).

Calculates the square root of a given non-negative number.

Calculates the expected inflation rate based on the unemployment rate, using a simplified Phillips Curve model.

Calculates your Korean age based on your birth year.

Calculates the time difference between two dates, providing results in days, weeks, and years.

Calculates the amounts of concentrate and water needed to achieve a specific dilution ratio.