Project category
Decks & Fences calculators
Decking, fence post and panel calculators.
- Fence CalculatorEnter one straight fence length or a comma-separated list of section lengths in feet. Each section is rounded independently, joined corners share posts, and optional supplier prices produce a material cost estimate.
- Decking Calculator — Boards, Joists, and ScrewsEnter deck dimensions and the approved board, joist, and fixing layout to get boards, joists, regular board-to-joist screws, whole fastener packs, and optional entered-price cost.
- Deck Stain Calculator — Square Footage and GallonsMeasure the deck floor and any additional stained surfaces, then use the exact product’s coat-specific coverage to calculate liquid volume and whole containers.
- Stair Stringer Calculator — Rise, Run, and PitchEnter finished total rise, the approved maximum riser, and the planned horizontal tread run to lay out a uniform straight-flight geometry without implying structural or code approval.
How these decks & fences calculators work
Each calculator starts from site measurements in feet and inches, converts them with a tested formula, shows the exact quantity and your waste allowance as separate lines, then rounds up to the package or order unit you actually buy. Prices are optional and always entered by you, so the estimate reflects your supplier rather than a national average.
Decks & Fences measuring guides
Step-by-step guides with worked examples and reference tables for United States.
- How to Measure a Fence LineMeasure fence runs by post type: end posts, corner posts, regular posts, and gates. Calculate board and post quantities for a complete fence.
- How Much Fence for a Quarter Acre?A square quarter acre needs about 417 ft of fence, but a 66 by 165 ft lot of the same area needs about 462 ft. Area does not set perimeter; shape does.
- How to Measure a Deck for BoardsMeasure deck dimensions and understand how nominal board sizes differ from actual widths. Account for gaps, direction, and waste to calculate decking needed.
- How Many Deck Joists Do You Need?Deck joists equal the deck length divided by the on-center spacing, rounded up, plus one closing joist. Size, span, and connections stay with code.
- Deck Board Sizes, Actual Widths, Lengths, and CoverageConvert a deck board's actual width and planned gap into rows and linear feet, then compare common nominal wood sizes with manufacturer-listed composite dimensions.