Drainage & Sewer Line
Trench excavation, bedding, pipe count and backfill for a pipeline.
Inputs
Results
Enter your values, then press Calculate Now to evaluate the output.
Guide — Drainage & Sewer Line
The drainage and sewer calculator below follows standard Indian construction practice and the relevant IS-code conventions. Enter the site dimensions exactly as measured, press Calculate Now, then refine the quantities line by line in the live sheet before you export.
Trench width is fixed by the pipe outside diameter plus a working space of about 300 mm on each side. Deeper trenches also need shoring or battered sides, which increases the excavated volume substantially.
Bedding is a 150 mm compacted granular layer under the barrel, with haunching brought up to the pipe springing line so the load is carried evenly rather than on the socket.
Backfill is the excavated volume less the bedding and the displaced pipe volume. Selected excavated material can usually be reused above the crown, but the first 300 mm surround should be imported granular fill.
Treat every output as an indicative pre-tender estimate. Site conditions, wastage allowances, specification changes and local market rates all move the final figure, so validate against your drawings and approved rate analysis before procurement.
Master Measurement Sheet
| Sr. No. | Description | Unit | NOS 1 | NOS 2 | L | B | D | QTY | Action |
|---|---|---|---|---|---|---|---|---|---|
| 1 | 1.000 |
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About the Drainage & Sewer Line
This tool is built for site engineers, quantity surveyors, contractors and property investors who need dependable numbers fast. Every input is reactive — changing a single field instantly recomputes the full output set, so you can run sensitivity checks on dimensions, grades and rates before committing to an estimate.
Keep unit consistency in mind: metric inputs (metres, square metres, cubic metres) produce metric outputs, with imperial and Indian trade units shown alongside where they are commonly used on site.