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Accurately calculate the area of an ellipse by entering the semi-major and semi-minor axes. Supports customizable units and decimal precision.
Circle Area Calculator
Quickly calculate the area of a circle by entering the radius, diameter, or circumference. Supports custom units and precision settings.
Prime and Composite Number Calculator
Instantly identify prime, composite, or special numbers. Supports batch checking and mathematical property analysis.
Least Common Multiple (LCM) Calculator
Quickly calculate the least common multiple (LCM) of two or more integers. Supports space-separated number list input.
Trigonometry Calculator
Calculate six trigonometric functions from radian values with custom decimal precision.
Circle Area Calculator
Quickly calculate the area of a circle by entering the radius, diameter, or circumference. Supports custom units and precision settings.
Prime and Composite Number Calculator
Instantly identify prime, composite, or special numbers. Supports batch checking and mathematical property analysis.
Least Common Multiple (LCM) Calculator
Quickly calculate the least common multiple (LCM) of two or more integers. Supports space-separated number list input.
Trigonometry Calculator
Calculate six trigonometric functions from radian values with custom decimal precision.
Inverse Trigonometric Function Calculator
Accurately calculate radian values for inverse trig functions like arcsin and arccos. Supports 6 function types and custom decimal precision.
When you need to accurately calculate the area of an ellipse, this tool outputs the result directly using the standard formula A = π × a × b, where 'a' represents the semi-major axis (the longest radius) and 'b' represents the semi-minor axis (the shortest radius).
Q: Must the semi-major axis be greater than the semi-minor axis?
A: Yes, by the definition of an ellipse, the semi-major axis is always greater than or equal to the semi-minor axis.
Q: What if the unit in the calculation result is incorrect?
A: Check the consistency of your input units to ensure both the semi-major and semi-minor axes use the same unit.
The semi-major and semi-minor axes must be positive real numbers. Units only affect the display and are not automatically converted. The number of decimal places must be an integer between 0 and 10. Floating-point arithmetic may cause a margin of error of ±0.0001.
For engineering calculations, it is recommended to keep 4 decimal places. For example, an ellipse with a semi-major axis of 8 cm and a semi-minor axis of 5 cm has an area of approximately 125.6637 cm². Note: This formula only applies to standard ellipses; irregular curves require integration methods to solve.
