Estimate Hong Kong domestic water and sewage charges from consumption and meter-reading days. See the WSD tier breakdown, bill variance and ±20% usage scenarios without account data.
How are Hong Kong domestic water and sewage charges estimated?
Domestic water charges use four consumption tiers adjusted to the meter-reading period. Sewage is estimated separately after a day-adjusted allowance; enter cubic metres and reading days to see both components and compare a stated bill.
How this calculator works
The calculator applies WSD's 121.64-day domestic tier basis to the actual reading period, then adds the published sewage charge. It also models consumption at −20%, selected use and +20%; the formal bill remains authoritative.
How this page was produced
Curatevia converted the listed official or first-party source rules into deterministic local calculations, then checked reference, boundary, invalid and bilingual-equivalence cases.
Limits and safe next step
This excludes deposits, arrears, adjustments, flushing water, non-domestic charges and account-specific decisions.
Sources accessed 6 August 2026. Review the official source links before relying on a regulated decision.
