Physics

Crawl Ratio Calculator

Find a vehicle's overall crawl ratio.

Calculated Output

Crawl ratio (:1) 44.28

Formula: crawl = trans × transfer × axle

Step-by-Step Breakdown

1. Values used:

2. Transmission low gear = 4 :1

3. Transfer case low = 2.7 :1

4. Axle ratio = 4.1 :1

6. Crawl ratio = Transmission low gear x Transfer case low x Axle ratio = 4 x 2.7 x 4.1 = 44.28:1

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The math behind it

crawl ratio = transmission low × transfer-case low × axle ratio. Higher means slower, more controllable crawling.

4.0 × 2.7 × 4.1 → about 44.3:1.

What's a good crawl ratio?

Serious rock crawlers aim for 50:1 or more.