Free tools
Builder tools that do the math for you
Free calculators for the everyday questions on a site: feasibility, budgets, slope, fill, and squaring. No sign-up required.
Land Feasibility Quiz
A scored ~5-minute readiness check across slope, utilities, access, and constraints.
Development Budgeting Tool
Location-specific estimates for permits, utility connections, and site development.
Slope Calculator
Slope, grade, and angle from elevation and distance.
Gravel & Fill Calculator
Cubic yards, tonnage, and truckloads for fill, gravel, and drain rock.
Square Check
Diagonal and squaring checks for foundations and layouts.
Excavation & Fill Calculator
Balanced dig depth, dirt import/export, and truck loads for crawlspace and slab.
Pipe Slope Calculator
Sewer and drain runs: total drop, end depth, and required slope.
TDH & Design Flow Rate
Septic pump sizing: design flow rate and total dynamic head.
Want a second set of eyes on a lot?
Run a full SiteFacts screening on any parcel in the app.