Output unit: Default Meter Centimeter Millimeter Kilometer Inch Foot Yard Mile (US statute) Angstrom Astronomical unit Caliber Decimeter Ell Em Fathom Fermi Furlong League (UK) League (int'l) Light year Micrometer Mil Mile (UK nautical) Mile (US nautical) Mile (int'l nautical) Nanometer Parsec Pica Picometer Point Rod
Fraction precision: No rounding 1/2 1/4 1/8 1/16 1/32 1/64 1/128 1/256
Decimal precision: 2 3 4 6 8 10 12

Quick π approximations:

Exact π
22/7
355/113
Custom π value:

Show minimal step-by-step