Fence Rail Calculator
Count rails (stringers) for any fence length.
Rails (or stringers) are the horizontal boards between posts that hold the pickets. This calculator counts both individual rails and 8 ft sticks to buy.
2 for ≤5 ft, 3 for 6 ft+
Common: 8 ft
Calculation Results
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📌 3 rails recommended for fences over 6 ft tall.
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🛠️ How This Calculator Works
The calculator divides fence length by post spacing to count sections, multiplies by rails per section, then divides total rail length by your stock rail length to count sticks to buy.
📐 Formula
Sticks = ⌈(sections × rails per section × spacing) / stock length⌉📝 Example Calculation
150 ft fence, 2 rails per section, 8 ft spacing, 8 ft sticks: Sections = 19 → Rails = 38 Rail LF = 38 × 8 = 304 ft Sticks = ⌈304/8⌉ = 38
💡 Pro Tips from Fence Builders
- Use 2 rails for fences ≤ 5 ft tall, 3 rails for 6 ft+, 4 rails for 8 ft.
- 2×4 rails are standard; upgrade to 2×6 for heavy gates or wind loads.
- Notch posts or use rail brackets — toe-screwing rails to posts loosens fast.
- Pre-treat rail ends with sealant before installing.
❓ Frequently Asked Questions
How many rails does a 6 ft fence need?
Three rails — top, middle and bottom. The middle rail prevents picket warp and gives the fence rigidity.
What size lumber for fence rails?
2×4 is standard for residential wood fences. Use 2×6 if you have heavy gates, tall fences or strong winds.
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