Jump to… 10^-35 m (0.00000000001 ym - Planck scale) 10^-34 m (0.0000000001 ym) 10^-32 m (0.00000001 ym) 10^-30 m (0.000001 ym) 10^-27 m (0.001 ym) 10^-24 m, 1 ym (yoctometer) 10^-21 m, 1 zm (zeptometer) 10^-18 m, 1 am (attometer) 10^-15 m, 1 fm (femtometer) 1 pm (picometer) 1 nm (nanometer) 10 nm (nanometers) 100 nm (nanometers) 1 μm (micrometer) 10 μm (micrometers) 100 μm (0.1 mm) 1 mm (millimeter) 1 cm (centimeter) 1 m (meter) 10 m (meters) 100 m (meters) 1 km (kilometer) 10 km (kilometers) 100 km (kilometers) 1 Mm (megameter) 10 Mm (megameters) 100 Mm (hundred megameters) 1 Gm (gigameter) 10 Gm (gigameters) 100 Gm (gigameters) 1 AU (astronomical unit) 1 Tm (terameter) 1 Pm (petameter) 1 ly (light-year) 1 pc (parsec) 1 Zm (zettameter) 1 Ym (yottameter) 10^27 m (largest ring)