How to estimate fence sections and posts
Start with total fence length and the nominal width of each section. The calculator rounds sections up, derives posts and rails from that count, and keeps gate count editable because gates usually affect the post layout.
Why your measurements stay editable
PrepMyBuild uses your description to help fill the fields, then calculates the result from the measurements and assumptions shown on screen. You can review and change those inputs before using the estimate.
Use the result as a purchasing conversation
Material estimates are most useful when checked against supplier packaging, delivery rules, product-specific coverage and the conditions at the actual project site. PrepMyBuild is designed to make those checks easier, not replace them.