Plumbing & Drainage

Drainage Grade Station Calculator: Elevation Table by Station

Build a field-ready grade line for French drains, swales, trench bottoms and gravity pipe planning. Enter one starting datum and a target fall; the calculator returns the end elevation and a station table instead of only a slope percentage.

Maintained by Home Measure Lab Editorial TeamUpdated September 25, 2026Method & corrections

Project measurements

Enter the dimensions and spacing rules you intend to lay out in the field.

Total run length

Starting elevation / datum

Target fall

Station interval

Compare a measured end elevation

Measured end elevation

Project result

Drainage grade station plan

Review the target end elevation, cumulative fall and the station-by-station grade line generated from the values you entered.

Planning estimate only. Verify product coverage, package size, supplier specifications and project requirements before purchasing.

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Project field workflow

Carry this calculation through the project

Record planned and measured stations without automatic pass/fail.

v9 workflow

1 · Measure / recordDrainage Grade Station Field Log

2 · CalculateUse this calculator with the field facts you verified.

3 · Save to projectKeep the result with the rest of the browser-local Project Workspace evidence. 4 · Execute / reconcileRecord field checks and actual usage without rewriting the original plan.

Home Measure Lab keeps measurement evidence, calculated plans and field actuals distinguishable. Project links are browser-local unless you explicitly export them.

Drainage grade profile

Turn slope into a station-by-station elevation sheet

The profile generator converts a start elevation, target fall and station interval into cumulative field elevations that can be printed, downloaded or copied as CSV.

Grade station table

Field plan updates with the calculator inputs.

Field check

Compare planned values with what you measure

Measured values are stored separately in this browser. They never overwrite calculator inputs or the original field plan.

Check	Planned	Measured	Delta

Field note (optional)

Enter measured values only where a comparison is useful.

A delta is descriptive only. Home Measure Lab does not apply a universal tolerance or automatic engineering/code acceptance decision.

Illustration and station tables are planning aids. Numeric calculator inputs/results remain authoritative; verify field dimensions, product instructions, project documents and applicable requirements before cutting, drilling, fastening or excavating.

Methodology

Grade-line formula & field-layout assumptions

Total fall

run length × target fall %

Converts the entered percentage grade into a vertical change over the full run.

Target elevation at station

start elevation − station distance × target fall %

Uses one fixed benchmark so cumulative errors are easier to catch.

Target end elevation

start elevation − total fall

The planned endpoint for the entered grade.

Station count

ceiling(run ÷ interval) + endpoint

Always includes the final run endpoint even when the interval does not divide evenly.

How to measure this project

Choose a benchmark that will not move during the work. Measure the developed drainage run along the intended alignment, enter the target fall you have selected from project requirements, and choose a station interval that is practical to mark in the field. Transfer elevations from the same datum rather than chaining one station from the previous station.

How to use this result

Use the result as a field-layout aid. Verify the governing detail, product instruction and jobsite reference before marking or cutting.

Reference

What the station table does

Item	Solved here	Verify separately
Grade line	Target elevation at each station	Required slope/grade for the actual drainage system
Datum	Arithmetic from one entered benchmark	Benchmark stability and instrument setup
Field transfer	Cumulative station distances	Actual trench/pipe invert elevations and site obstructions
Materials	Not estimated	Pipe, gravel, fabric, excavation and outlet design

Start from a drawing

Landscape & Drainage Takeoff Studio

Upload a plan or screenshot, calibrate one known dimension, trace the relevant geometry, and save the measured evidence before returning to this calculator for product-specific planning.

Open takeoff studio

Questions

Frequently asked questions

Why use station elevations instead of only a slope percentage?

A percentage describes the overall grade, but field work is easier to check when each marked station has a target elevation from one fixed datum.

Does the calculator decide the correct drainage slope?

No. You enter the target fall. Verify the required grade, outlet, pipe/system requirements and site conditions separately.

What if my station interval does not divide evenly into the run?

The schedule keeps the regular interval stations and adds the exact endpoint as the final station.

Next step

Keep this project moving

Follow the measurement into the most useful related reference, calculator or project view.

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