---
title: "Drainage Calculators | XTRAW Tools"
description: "Drainage calculators for pipe slope, drainage drop, grade percentage, run length, grading, stormwater planning, and site drainage estimates."
url: "https://xtraw.com/tools/calculators/construction-home-calculators/construction-calculators/drainage-calculators/by,ordering/dirDesc"
date: "2026-05-22T02:56:59+00:00"
language: "en-GB"
---

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 # Drainage Calculators

#### Latest Products

 [ ![Drainage Slope Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-drainage-slope-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/construction-home-calculators/construction-calculators/drainage-calculators/drainage-slope-calculator "Drainage Slope Calculator")  new

## [Drainage Slope Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2446&virtuemart_category_id=261&Itemid=173)

 Calculate drainage slope, drop, and grade percentage. Use ...

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