Rainwater Harvesting Calculator Bangalore | Cost + Tank Size

Roof / terrace area sq ft

Measure the flat roof area that drains rainwater. For apartments, this is the total terrace area of the building.

Property type

System type

BWSSB accepts all three. Combined system is ideal — stores water for use and recharges groundwater.

Existing infrastructure

💰 Cost estimate for your property

Estimated cost

₹0

installed, inclusive

Annual water savings

₹0

vs BWSSB tanker cost

Rainwater captured

0 L

per monsoon season

Payback period

—

excludes penalty savings

Cost breakdown

Estimates are indicative based on Bangalore 2026 market rates. Actual cost depends on site conditions, materials chosen, and civil work required. Final quote issued after free site assessment.

Get an exact quote for your property — free site assessment, no obligation.

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Roof / terrace area sq ft

Number of people in household / building

Include all residents. For apartments enter total residents across all floors.

Days of autonomy (storage target)

How many days of non-drinking water supply you want stored. 15 days covers most dry spells between rain events in Bangalore.

Intended water use

🪣 Tank capacity recommendation

Recommended tank size

0 L

—

Daily demand

0 L

non-drinking water

Monsoon season capture

0 L

Jun–Nov, Bangalore avg

% needs met by rain

during monsoon season

What fits in your terrace

💡 Tank type for your size: —

For BWSSB compliance, your system also needs a first-flush diverter and a filter chamber — both included in every LoklFix installation.

Water demand estimates use standard Bangalore household consumption benchmarks. Actual usage varies. A site assessment confirms roof drainage layout and tank placement before installation.

Get an exact tank size and layout recommendation — free site assessment, same-day quote.

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→ How rooftop RWH works for apartments → How to register with BWSSB → Why penalty still appears

Rainwater Harvesting Calculator

Free Site Assessment — Bangalore-Wide