Fence panel and baseline post calculator

Estimate repeated panels and line-post positions from a measured fence path and total gate openings.

Direct answer

Subtract total gate-opening width from the measured fence path, divide by panel length, and round up. Treat corner, end, gate, slope, bracing, footing, and safety-specific posts separately.

Interactive tool

Enter your measurements

Enter valid measurements and select Calculate.

Transfer these inputs to a new local editor project

Formula

Panels = ceiling(max(path length - gate openings, 0) / panel length); baseline line positions = panels + 1.

Worked example

A 180 ft path with 8 ft of gates leaves 172 ft. At 8 ft per panel, ceiling(21.5) gives 22 panels and 23 baseline line positions before special posts.

Assumptions

The path is measured along the fence line.
Panels may be cut to close the remaining length.
Baseline positions describe one continuous line only.

Caveats

Corners, ends, gates, slopes, wind, bracing, footings, property boundaries, and utilities change the design.
Pool barriers require specific verified safety features and local compliance.
Obtain a survey and utility location before installation.

Primary references

Safety Barrier Guidelines for Home PoolsU.S. Consumer Product Safety Commission; accessed 2026-08-02.
2024 International Residential Code: Building PlanningInternational Code Council; accessed 2026-08-02.

Understand and continue

Deck, patio, pool, and landscape coordination

Treat outdoor features as a connected site plan with drainage, access, fall, water, utility, and barrier risks.

Read supporting guide

Pool and landscape coordination concept

A site-planning diagram for water, deck, barrier, gate, equipment, supervision, and planting zones.

Open starting concept

Planning quantity, not construction directionThis calculator does not verify codes, specifications, structure, utilities, product suitability, purchasing, pricing, installation, or safety. Verify the result and all project decisions with qualified local professionals.