SlateTablet
Free Surveying Tools
Powerful, browser-based calculators built for land surveyors. No login required. No ads. Just the math.
Aliquot Part Calculator
Interactively build and visualize PLSS sectionalized land descriptions. Click to select quarters and halves, nest them to any depth, and instantly see where the parcel falls in the section with acreage.
Level Loop Closure Calculator
Enter rod readings to compute running elevations, misclosure in feet and mm, and closure ratio. Check first through third order tolerances and auto-adjust with the Bowditch rule. Single-wire and three-wire modes.
Vertical Curve Calculator
Enter two grades and a curve length to get PVC, PVI, PVT elevations, K-value, high/low point, and a full station elevation table. Includes a parabolic profile diagram.
Deed Plotter
Paste metes-and-bounds deed language to instantly plot the boundary, calculate closure error, precision ratio, and acreage. Supports curves and passing calls.
Surveying Unit Converter
Convert between feet, meters, chains, links, varas, rods, yards, miles, and more. Plus angle conversions: DMS ↔ decimal degrees ↔ radians ↔ grads.
Traverse Closure Calculator
Enter bearings and distances to get latitudes, departures, closure error, precision ratio, and closure bearing. Balance the traverse with Bowditch's, Transit, or Crandall adjustment and get adjusted coordinates.
Horizontal Curve Calculator
Solve all curve elements (Δ, R, D, T, L, LC, E, M) from any two known values. Supports DMS and decimal degree input. 18 input combinations.
Spiral Curve Calculator
Enter radius, spiral length, and intersection angle to get TS, SC, CS, ST stations, tangent and external distances, throw, and a full spiral offset table.
State Plane / UTM Converter
Convert between latitude/longitude, UTM, and NAD83 State Plane coordinates for all 50 states. US Survey Feet or meters.