---
title: "Rainwater Harvesting Calculators | XTRAW Tools"
description: "Rainwater harvesting calculators for roof runoff, rainwater collection, catchment area, annual rainfall, runoff coefficient, and rain barrel planning."
url: "https://xtraw.com/tools/calculators/science-calculators/environmental-calculators/rainwater-harvesting-calculators/dirDesc"
date: "2026-08-20T19:46:46+00:00"
language: "en-GB"
---

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 # Rainwater Harvesting Calculators

#### Latest Tools

 [ ![Rainwater Harvesting Calculator from XTRAW Tools](https://xtraw.com/images/virtuemart/product/resized/xtraw-rainwater-harvesting-calculator-360x360_230x230.jpg) ](https://xtraw.com/tools/calculators/science-calculators/environmental-calculators/rainwater-harvesting-calculators/rainwater-harvesting-calculator "Rainwater Harvesting Calculator")  new

## [Rainwater Harvesting Calculator](https://xtraw.com/index.php?option=com_virtuemart&view=productdetails&virtuemart_product_id=2536&virtuemart_category_id=313&Itemid=173)

 Estimate how much rainwater you can collect from a rooftop ...

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