Retaining Wall Height vs Footing Calculator
Estimate the footing width, depth, buried block course and gravel backfill for a retaining wall of a given height. Rule-of-thumb guide only.
Compare Your Options And Get Clear Answers
Estimate the footing width, depth, buried block course and gravel backfill for a retaining wall of a given height. Rule-of-thumb guide only.
Retaining Wall Height vs Footing Estimator
Enter your numbers below for an instant estimate.
How It Works
Key concepts behind this calculator
Bury the First Course
Typically 10% of exposed height, at least 6 inches.
Footing Width
Around half to two thirds of total wall height.
Backfill
Free-draining gravel behind the wall with drain pipe.
Use As A Guide
Results are estimates based on your inputs. Check real quotes, rates and professional advice before deciding.
Wall Height Guide
General segmental block wall rules.
| Exposed Height | Buried Course | Footing Width | Engineering? |
|---|---|---|---|
| Up to 2 ft | 6 in | 18 in | Usually no |
| 2 β 3 ft | 6 β 8 in | 18 β 24 in | Check local |
| 3 β 4 ft | 8 β 10 in | 24 β 30 in | Maybe |
| Over 4 ft | 12+ in | 30+ in | Yes |
| Rule of Thumb | Bury ~10% of height | Drainage is critical | Over 4 ft β engineer |
Retaining Wall Height Calculator FAQ
Answers to common questions about this calculator.
Typically a compacted gravel base 6 inches thick, or a concrete footing below the frost line for taller walls.
Often about half to two thirds of the wall height.
Many areas require permits for walls over about 4 feet. Check local rules.
No. It is a rule-of-thumb guide only.