Fence Gate Calculator
Estimate gate leaf dimensions, picket count, frame and diagonal stock, hinges and material cost for single- or double-leaf fence gates.
Default project preview
2.94 ft each
Picket quantity
12
Frame stock
7
Frame and brace length
49.1 ft
Hinge guide
4
Calculator
Build the material order
Your order will appear here
Enter the project details and calculate a rounded material estimate.
Input and output guide
What each value means
The labels and units below are part of this calculator’s visible methodology. Replace every default with measurements or product data from the actual project.
Post-to-post opening
Enter this project assumption in ft. The current imperial default is 6 ft.
Gate height
Enter this project assumption in ft. The current imperial default is 6 ft.
Total side and centre clearance
Enter this project assumption in in. The current imperial default is 1.5 in. Minimum: 0.
Gate leaves
Enter this project assumption in a unitless value. The current imperial default is 2. Minimum: 1. Maximum: 2.
Picket face width
Enter this project assumption in in. The current imperial default is 5.5 in.
Picket gap
Enter this project assumption in in. The current imperial default is 0.5 in. Minimum: 0.
Frame stock length
Enter this project assumption in ft. The current imperial default is 8 ft.
Frame stock allowance
Enter this project assumption in %. The current imperial default is 10 %. Minimum: 0. Maximum: 50.
Price per frame-stock piece
Enter this project assumption in a unitless value. The current imperial default is 16. Minimum: 0.
Price per picket
Enter this project assumption in a unitless value. The current imperial default is 4. Minimum: 0.
Hardware cost per leaf
Enter this project assumption in a unitless value. The current imperial default is 45. Minimum: 0.
How to read the outputs
Picket quantity
across total gate width. Default preview: 12.
Frame stock
8 ft pieces. Default preview: 7.
Frame and brace length
perimeters plus one diagonal per leaf. Default preview: 49.1 ft.
Hinge guide
two hinges per leaf. Default preview: 4.
Total gate width
clearance deducted. Default preview: 5.88 ft.
Material cost
frame, pickets and entered hardware. Default preview: $250.00.
Methodology
Transparent calculation
BuildMeter converts every input to a consistent internal unit, applies the selected allowance, and rounds products up to whole purchasable units.
Usable gate width = opening − total clearance. Leaf width divides usable width by leaf count. Frame stock includes each leaf perimeter plus one diagonal brace.
Reviewed project guidance
How to use this estimate in a real project
Last reviewed: July 30, 2026
Estimate gate frame members, infill, hinges and allowances from opening size and selected construction pattern.
Calculation steps
- 1Enter the actual project dimensions or operating values.
- 2Apply the calculator formula using consistent units.
- 3Review the unrounded result and the editable allowance.
- 4Round only to the product, stock length or equipment increment actually purchased.
Worked numerical example
A 4 ft × 6 ft gate with two rails and one diagonal brace requires more frame stock than perimeter alone and should be checked for hinge capacity.
Purchasing and rounding
Order gate-frame stock from the actual finished gate size after allowing the required hinge and latch clearances. Size hinges, posts and hardware for the completed gate weight and width; infill quantity should follow the same spacing or coverage rule used on the adjoining fence.
Interpret the result
The material result describes the gate geometry and selected bracing pattern. It does not determine whether the gate will resist sagging or wind loads; post stiffness, hinge rating, frame connections and diagonal-brace direction control service performance.
Page-specific assumptions
- Inputs describe one consistent project condition.
- Entered yields and efficiencies match the selected product or equipment.
- Site-specific code and engineering requirements are checked separately.
Common mistakes
- Mixing imperial and metric inputs.
- Using nominal dimensions where actual coverage controls.
- Rounding intermediate values too early.
- Treating a quantity estimate as design approval.
Primary and technical references
BuildMeter provides planning estimates, not engineering, architectural, electrical, mechanical, plumbing, permit or code approval. Review the methodology and verify final decisions with product documentation and qualified professionals.
FAQ
Fence Gate Calculator questions
Should clearance include the centre gap on double gates?+
Yes. Enter the total of hinge-side, latch-side and centre clearances.
Why include a diagonal brace?+
A brace helps resist gate sag, but brace direction and framing depend on material and hinge arrangement.
Are two hinges always enough?+
No. Heavy or tall gates may require three or more rated hinges and stronger posts.