Free tool
Fence Material Calculator
Estimate posts, pickets, rails, and post-setting concrete for a straight privacy-fence run from length, post spacing, and picket size.
Result
Results updated.
| Posts | 14pieces |
|---|---|
| Pickets | 200pieces |
| Rail material | 312linear ft |
| Post concrete (50 lb bags) | 28bags |
Formula
- sections = ceil(length ÷ post spacing)
- posts = sections + 1
- pickets = ceil(length × 12 ÷ (picket width + gap))
- rail LF = sections × post spacing × rails per section
- concrete = posts × 2 bags (about 1 cu ft per hole)
Assumptions
- Straight run with level grade; posts set in concrete.
- Two 50 lb bags per post hole (about 1 cu ft).
- Rails ordered as lineal feet (e.g. 2×4s).
What this does not cover
- Slopes, corners, and gates change post and hardware counts.
- Post depth and footing size must meet frost-depth and wind-load requirements in your area.
Planning aid only — not a quote. Quantities use documented rules of thumb; verify against your plans, local codes, site conditions, and real supplier pricing before ordering or bidding.
Methodology
A fence is a repeating bay. Sections equal length divided by post spacing (rounded up); posts are sections plus one. Picket count divides total fence length in inches by picket width plus gap. Rail footage is sections times spacing times rails per section. Post concrete assumes two 50 lb bags per post — enough for an 8-inch hole roughly 2 feet deep in typical soil; frost depth and local code may require more.
Worked example: 100 ft run, 8 ft spacing, 5.5 in. pickets with 0.5 in. gaps
- Sections = ceil(100 ÷ 8) = 13 → posts = 14
- Pickets = ceil(1,200 ÷ 6.0) = 200
- Rails = 13 × 8 × 3 = 312 LF; concrete = 14 × 2 = 28 × 50 lb bags
Frequently asked questions
Does this handle corners, gates, and slopes?
No — it models one straight run. Corners add posts, gates add hardware and heavier posts, and slopes change picket counts. Take each straight run separately and add gate and corner hardware by hand.
How deep should fence posts be set?
A common rule is one-third of the post height, and never shallower than your local frost depth. The concrete estimate here assumes about a 2 ft footing.
Does Drevanto support fence estimates?
Yes — fencing is one of the 26 certified Instant assemblies. Describe the run and gates and you get an editable draft with materials and labor.
Certified benchmark · 2026-08-21
In 520 certified profile-mode generations across 26 supported Instant assemblies on Windows (profile/AOT) and an Android API 36 emulator, supported jobs became editable estimates in a median of 0.028 seconds (rounded); the measured 95th percentile was 48.008 milliseconds (approximately 0.048 seconds), with 0 generative-AI provider calls.
- median, supported jobs
- 0.028 sec
- certified generations
- 520
- supported assemblies
- 26
- failures · 0 AI provider calls
- 0
Certified supported jobs only. Editable output; contractor pricing and field verification remain in control. Full methodology and results
See it run on your own jobs
The private Drevanto beta is the real, editable product — not a website demo. Apply, and we will follow up by email.