Oman Electricity and Water Bill Calculator — Dhofar
Estimate your monthly bill in OMR from the kWh and water you use, with the tariffs published by Nama Dhofar Services. Advanced adds meter readings with dates, AC estimates, your own rate, other charges and a second month to compare.
The month's kWh from your bill or the Nama app.
Only changes the cost per day. The tiers are per month.
Check your bill for any other charges.
For commercial, industrial, hotel and tourism, or agriculture and fisheries accounts: their rates are not on the tariff page used here, so type the baisa per kWh from your bill. It replaces the residential tiers for every kWh.
Tier-by-tier breakdown
| Tier | Used | Price | Cost (OMR) |
|---|
How your bill is worked out
Each tier of kWh × its price in baisa, plus water × the price per m³.
- 1
Electricity tiers
5,000 kWh, 2 tiers
= OMR 74.000 - 2
Water
30 m³ × 0.660
= OMR 19.800 - 3
Add them up
74.000 + 19.800
= OMR 93.800 - 4
Cost per day
93.800 ÷ 30 days
= OMR 3.127
Read more: the Nama Dhofar tariffs, the formula and a worked example
Nama Dhofar Services bills electricity in kilowatt-hours (kWh) and water in cubic metres (m³). Prices are in baisa: 1 Omani rial (OMR) is 1,000 baisa. Home electricity is charged in monthly tiers: the first 4,000 kWh are cheapest and each later tier costs more. Water is one flat price per m³ that depends on the type of water account.
These are the tariffs published by Nama Dhofar Services for customers in Dhofar. If you are supplied by another company, check your supplier's tariff.
The formula
tier cost = kWh used in that tier × that tier's price in baisa ÷ 1,000
electricity = sum of the tier costs
water = m³ used × the price per m³
bill = electricity + water (+ any other charges on your bill)
cost per day = bill ÷ days in the bill
Worked example
A household on a primary account (two accounts or less) uses 5,000 kWh of electricity and 30 m³ of water, on a water account with 2 accounts or less, in a 30-day bill.
- Electricity: the first 4,000 kWh × 14 baisa = 56,000 baisa = OMR 56.000, and the next 1,000 kWh × 18 baisa = 18,000 baisa = OMR 18.000, so electricity is OMR 74.000 (an average of 14.8 baisa per kWh).
- Water: 30 m³ × OMR 0.660 = OMR 19.800.
- Bill: 74.000 + 19.800 = OMR 93.800, which is 93.800 ÷ 30 = OMR 3.127 a day (rounded).
- 1,000 more kWh would still cost 18 baisa each; above 6,000 kWh the price goes up to 32 baisa.
- The same 5,000 kWh would cost OMR 53.000 on an Oman citizen (NSS) account (4,000 × 10 + 1,000 × 13 baisa) and OMR 114.000 on an additional account (4,000 × 22 + 1,000 × 26 baisa).
Meter readings and reading dates
kWh used = current reading − previous reading. Bills are read over a period of about 28 to 32 days: Nama's own bill calculator expects a reading period in that range. If you enter both reading dates, the days between them are used for the cost per day, and you'll see a note if the period is outside 28 to 32 days.
Estimating kWh from your AC
AC kWh = AC units × tons × kW per ton × hours a day × days
1 ton = 12,000 BTU/h = 3.517 kW of cooling
Three 1.5 ton standard split units (1.3 kW per ton) running 14 hours a day use 3 × 1.5 × 1.3 × 14 = 81.9 kWh a day, or 2,457 kWh in 30 days. Add 10 kWh a day for everything else (300 kWh) and the month is 2,757 kWh.
Electricity tariffs (residential)
From Nama Dhofar Services' tariff guide, checked on 13 October 2026. Prices are in baisa per kWh per month.
| Use in the month | Baisa/kWh |
|---|---|
| 0 – 4,000 kWh | 14 |
| 4,001 – 6,000 kWh | 18 |
| Above 6,000 kWh | 32 |
| Use in the month | Baisa/kWh |
|---|---|
| 0 – 4,000 kWh | 22 |
| 4,001 – 6,000 kWh | 26 |
| Above 6,000 kWh | 32 |
| Use in the month | Baisa/kWh |
|---|---|
| 0 – 4,000 kWh | 10 |
| 4,001 – 6,000 kWh | 13 |
| Above 6,000 kWh | 20 |
Non-residential electricity rates (commercial, industrial, hotels and tourism, agriculture and fisheries) are not on that page, so this calculator does not include them. Use "Use my own rate" in Advanced with the rate from your bill.
Water tariff
Nama Dhofar's published 2025 water tariff, from its water tariff page, checked on 13 October 2026.
| Water account | OMR/m³ | OMR/gallon (page) |
|---|---|---|
| Residential, 2 accounts or less | 0.660 | 0.003 |
| Residential, more than 2 accounts | 0.770 | 0.0035 |
| Non-residential | 1.320 | 0.006 |
This calculator uses the per-m³ prices. Gallons are converted with 1 m³ = 219.969 imperial gallons; the page's per-gallon prices are rounded (for example 0.660 ÷ 219.969 = 0.0030004). 1,000 litres = 1 m³.
Good to know
- Summer bills are often much higher because of air conditioning, and the extra kWh also move into dearer tiers, so the bill rises faster than the use.
- Check your bill for any other charges. This calculator adds them only if you type them in Advanced.
An estimate for general information. Tariffs checked on 13 October 2026 against https://dhofarservices.nama.om/en-us/Pages/TariffGuide.aspx and https://dhofarservices.nama.om/en-us/Pages/Water-Tariff.aspx. Your actual bill comes from your supplier.
Common questions
How is an electricity bill worked out in Dhofar?
Nama Dhofar Services charges home electricity per kWh each month in tiers: on a primary account the first 4,000 kWh cost 14 baisa each, the next 2,000 kWh cost 18 baisa and anything above 6,000 kWh costs 32 baisa. Each tier is worked out on its own and the tiers are added up. So 5,000 kWh costs OMR 56.000 + OMR 18.000 = OMR 74.000.
What is a primary or an additional account?
On Nama Dhofar Services' tariff guide, the primary account rate is for customers with two accounts or less, and the additional account rate is for more than two accounts. Oman citizen accounts with the National Subsidy System (NSS) have their own, lower rates.
How much is water in Dhofar?
Nama Dhofar's published 2025 water tariff is one flat price per cubic metre: OMR 0.660 for homes with 2 accounts or less, OMR 0.770 for homes with more than 2 accounts and OMR 1.320 for non-residential. So 30 m³ on a home with 2 accounts or less costs OMR 19.800.
What about shops, hotels and farms?
The tariff guide used here lists residential electricity rates only. For commercial, industrial, hotel and tourism, or agriculture and fisheries accounts, type the baisa per kWh from your own bill in "Use my own rate" (Advanced).
I am not in Dhofar. Does this work for me?
These are the tariffs published by Nama Dhofar Services for customers in Dhofar. If you are supplied by another company, check your supplier's tariff. You can still type your own rate in Advanced.
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