Estimate a household water bill with the same simple flow used by local Sri Lankan water-bill tools.
Water Board Style Estimate
Domestic
For domestic households outside the Samurdhi and tenement-garden categories.
The comparison rows below use the same three-tariff layout exposed by the public Sri Lankan calculators and show the current row as the main total.
Current billLKR 2,117
SSCL (2.5%)LKR 44
VAT (18%)LKR 323
Change since 2023 tariff-9%
Change since Sep 2022 tariff133%
Current tariff block
Units
Rate
Amount
0.00-5.00 units
5
LKR 50
LKR 250
5.00-10.00 units
5
LKR 70
LKR 350
10.00-15.00 units
5
LKR 90
LKR 450
15.00-20.00 units
3
LKR 100
LKR 300
Service charge
-
-
LKR 400
SSCL
-
3%
LKR 44
VAT (18%)
-
18%
LKR 323
Total bill
-
-
LKR 2,117
Sources: Numbers.lk Water Bill Calculator layout and comparison flow, plus NWSDB gazette tariff tables effective on September 1, 2022, August 1, 2023, and August 21, 2024. This implementation recreates the visible public behavior; it does not claim to reproduce any private site code. The split between SSCL and VAT follows the public calculator display and standard Sri Lankan tax ordering.
FAQ
Are these calculators free?
Yes. lankacalculator tools are free to use and designed to be quick to access without sign-up.
How accurate are the results?
The calculators use clear assumptions and formulas, but results are estimates and should be checked against official documents or provider terms.
Can I use this on mobile?
Yes. The layout is built to work cleanly on phones, tablets, and desktops.
Do you store my inputs?
No account is required for these tools, and calculator inputs are not stored as user profiles in this v1 setup.
