Calculator

Floor jack size calculator

Enter GVWR in pounds. Get minimum jack rating (GVWR × 0.75) and a 2 / 3 / 4 ton class or NO_MATCH. Always pair with jack stands.

Enter values

Result

Enter values to begin.

Required ≈ GVWR × 0.75. Worked check: 6,000 × 0.75 = 4,500 → 3 ton (6,613 lb) class.

Related resources

Guides

Methodology guide

Limits, jack-stand disclaimer, and when to stop shopping this ladder.