Formula B is a boutique guitar effects pedal brand based in Todi, Umbria, Italy, founded by Marco Bovelli in 2014. Each pedal is hand built in small runs in Italy, with Bovelli drawing inspiration from classic vintage circuits and reinterpreting them with premium components and added flexibility.

The lineup includes overdrives, fuzzes, and modulation effects across the ATOMO and ARTIST series, with notable models such as the Vintage Vibe mkII (an homage to the Uni-Vibe), the Fuzz Rangers, the Super Plexi, the Eighty Master, and That Screamer. Several designs feature routing options like selectable boost-before or boost-after configurations, and the brand has earned a reputation for tackling complex analog circuits such as vibrato and rotary speaker effects.

Formula B pedals are distributed through boutique dealers including Boost Guitar Pedals and Electric Mojo Guitars, as well as through the brand's own Reverb shop, and have been used by players including Slash.

Formula B has 15 products cataloged on Equipboard, including Fuzz Effects Pedals, Overdrive Effects Pedals, and Univibe & Rotary Effects Pedals. Their gear is featured by 2 artists, with the strongest followings in Rock. Notable users include Eirik Stordrange and Umberto Padovan, Quiet is the new Loud.