Timing Belt Calculators A collection of tools to help design well toleranced belt systems for FRC and FTC robots. Belt Length Calculator Belt Pitch 2mm (GT2) 3mm (HTD) 5mm (HTD) Small Pulley Teeth (T1) Large Pulley Teeth (T2) Center Distance mm inches Calculate Belt Length Center Distance Calculator Belt Pitch 2mm (GT2) 3mm (HTD) 5mm (HTD) Small Pulley Teeth (T1) Large Pulley Teeth (T2) Belt Length teeth mm inches Calculate Center Distance