Speed Up or Speedup may refer to:

• Speedup or speed up, a metric for relative performance improvement established by Amdahl's law
• Speedup theorem, in computational complexity theory

• "Speed up", a song on the album Heart Attack by Krokus
• Speed Up / Slow Down, an EP by South
• "Speed Up" (Kara song), a song by Kara

• Speed Up, an Italian motorcycle manufacturer

• Pitch control