Belt & Chain Formulas

Timing Belt Calculator — pulley tooth ratio, belt length in teeth, and exact center distance for HTD, GT2, T-series synchronous belts. Includes worked example and 8 FAQ.

Pulley Speed Calculator — two-pulley RPM ratio, driven speed, and belt surface speed. Includes worked examples, common mistakes, and 8 FAQ.

Chain Drive Calculator — sprocket ratio, chain length in pitches, and chain speed formulas. Includes worked example, common mistakes, and 8 FAQ.

Belt Drive Calculator — speed ratio, belt length, and belt speed formulas explained. Includes worked example, common mistakes, and FAQ. Free online tool for mechanical engineers.