Water bill calculator for apartments
Type in last month's and this month's meter readings for each unit. You get every tenant's water bill, the total to collect, and how much water went missing.
Optional, e.g. meter reading.
To check for leaks.
| Unit | Previous reading | Current reading | Units | Bill (KES) | Remove |
|---|---|---|---|---|---|
| 9 | 1,350 | ||||
| 6 | 900 | ||||
| 12 | 1,800 | ||||
| – | – |
Total to collect
KES 4,050
Units used by tenants
27
How water bills are worked out
Units used is this month's reading minus last month's. Each tenant's bill is their units times your rate per unit, plus any fixed charge you add for every tenant.
A unit on most Kenyan water meters is one cubic metre, which is 1,000 litres. Use the rate written in your tenancy agreements.
Checking for leaks
If you enter the main meter's units for the same period, the calculator shows how much water no tenant meter recorded. A small gap is normal; a large one usually means a leak, a faulty sub-meter or an unmetered tap. Read more in how to bill water fairly.
Nothing you type is sent anywhere: the calculator runs in your browser.
Questions
How do I calculate a tenant's water bill?
Subtract last month's meter reading from this month's to get units used, then multiply by your rate per unit. Add any fixed charge you apply to every tenant.
What if the current reading is lower than the previous one?
That usually means a replaced or faulty meter, or a typing mistake. Check the meter before billing; the calculator flags these rows.
How much water loss is normal?
Some difference between the main meter and the sum of tenant meters is normal. More than about 10% is worth investigating for leaks or unmetered connections.