Circumference of circle - Circumference Calculator

After five terms, the sum of the Gregory—Leibniz series is within 0.

Machin-like formulae remained the best-known method for calculating π well into the age of computers, and were used to set records for 250 years, culminating in a 620-digit approximation in 1946 by Daniel Ferguson — the best approximation achieved without the aid of a calculating device.

Perimeter of a Semi-Circle The semi-circle is made after the division of the circle into 2 similar parts.

It is denoted by C in math formulas and has units of distance, such as millimeters mm , centimeters cm , meters m , or inches in.