Is there a file size limit?

No practical limit for most operations.

Results are generated using standard algorithms for maximum accuracy.

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Circle Calculator — best

Calculate circle area, circumference, and diameter.

Known Value

From

Formulas

Circumference = 2πr

Area = πr²

Diameter = 2r

π ≈ 3.14159265

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Calculate triangle area, perimeter and angles.

Calculate and scale aspect ratios for any resolution.

Calculate percentages easily: find X% of Y, percentage change, percentage difference, and more.