Rainwater Harvesting Calculator
Rainwater Harvesting Calculator — quick estimate
Estimate how much rainwater your roof can capture each year, the storage you'd need and the tanker-water cost you'd save — RWH is mandatory in most Indian cities. Adjust the inputs, then get an engineered design.
Your catchment
Harvest = catchment area × rainfall × runoff coefficient (1 mm over 1 m² ≈ 1 litre). Recharge/storage sizing depends on a design storm and site geology.
Get an engineered rainwater harvesting design — free
Our team will design the collection, filtration, storage and recharge system for your site and handle approvals. We'll attach the estimate above automatically.
Have a BOQ, drawing or tender for this scope? Send it for an item-wise rate-analysis review →
Your request is in
Thanks! Our plumbing team will send your tailored rainwater harvesting design within one business day.
Indicative estimates only — not a binding design. Actual yield depends on rainfall pattern, first-flush losses, filter efficiency and your municipal RWH bye-laws.
Got your number — what next?
A calculator gives you a first figure. These take it further.
The work itself
Read before you specify
The terms behind it
Delivered work with this scope
- MEPF for Advantec Wheels Alloy Plant, Jammu— Advantec Wheels
- Warehouse MEPF Delivered in Just 37 Days— client withheld
Need an exact BOQ, rate analysis or measurement sheet?
This is a quick engineering estimate. For tendering, billing or audit, our QS & estimation team prepares an item-wise BOQ, rate analysis and a verified measurement sheet to IS / CPWD norms — backed by 15+ years and ISO 9001:2015 quality processes.