Gears

Gear Ratio Calculator

Details

How to use Gear Ratio Calculator

What the tool does, how to run it, and what to expect from the result.

About this gear ratio calculator

Gear ratio = driven teeth ÷ driving teeth. 36 ÷ 12 = 3:1, so the output turns three times slower and, ignoring friction, with three times the torque: 1,800 RPM becomes 600 RPM and 10 N·m becomes 30 N·m. A ratio below 1 is an overdrive: faster and weaker.

At a glance

Who Gear Ratio Calculator is for

A quick way to understand who this helps, what it solves, and where it connects next.

Best fit

Students, lab workers, electricians and engineers who want the formula and the answer.

Ideal for

Using the gear ratio calculator without installing anything or signing up.

FAQ

Common questions

Short answers for the questions people usually have before trying a utility like this.

How do I combine several gear stages?

Multiply the ratios: a 3:1 stage followed by a 4:1 stage is 12:1 overall.

Do idler gears change the ratio?

No. An idler between two gears only reverses the direction of rotation.

Recommendations

You Might Also Like

Nearby tools from the catalog that fit the same job or workflow.

Cleanor app

Do it all on your device

Cleanor puts these tools in one app: compress and convert images, video, and audio, work with PDFs, and scan text right on your device. Plus free up storage and clear inbox clutter with Email Cleaner. Start with a free trial.

  • iPhone
  • Android
  • Macsoon
  • Windowssoon