How the Wi-Fi router estimate works
The calculator converts watts to kilowatts, multiplies by effective runtime, and then applies the electricity price. With the starting inputs, this Wi-Fi router uses about 8.6 kWh per month.
Mesh nodes, modem hardware, USB devices, radio power, and network activity affect the complete network draw.
How runtime changes the estimate
These scenarios assume the device draws the full starting wattage for the entire runtime. Cycling and variable-speed equipment should use effective runtime or measured kWh.
How much does a Wi-Fi router add to the electric bill?
A 12-watt Wi-Fi router running 24 hours per day uses about 8.64 kWh in a 30-day month. The monthly cost is small, but the load repeats every month because home networking equipment is normally left on around the clock.
Include the modem, mesh nodes, network switches, and any storage connected to the router when estimating the complete network. A label shows maximum input; a plug-in meter gives the better whole-system figure.
Router and home-network cost scenarios
Each scenario runs continuously for 30 days. Equipment count and measured wall power matter more than the router name alone. Costs use the latest 2026-05 U.S. residential average of 18.44¢/kWh.
Measure the whole network before changing it
Turning off essential networking can interrupt security systems, smart-home controls, backups, and communications. Start by measuring the combined load and removing only equipment that no longer serves a purpose.
When upgrading for coverage or speed, compare idle power and the number of required nodes. Replacing working equipment solely for a tiny electricity saving may not recover its purchase cost.
Estimated monthly cost in high-price states
Practical ways to reduce cost
- Remove unused mesh nodes only if coverage remains reliable.
- Use efficient replacement hardware when upgrading for other reasons.
- Do not interrupt security or essential connectivity casually.
Compare related equipment
Frequently asked questions
How much electricity does a Wi-Fi router use?
Using a 12-watt starting input for 24 hours per day and 30 days per month produces an estimate of 8.6 kWh per month. Actual use can differ because equipment may cycle or change power.
How much does it cost to run a Wi-Fi router each month?
At the latest 2026-05 U.S. residential average price of 18.44 cents per kWh, the starting estimate is $1.59 per month. Replace the inputs with your own numbers for a personal estimate.
What number should I use for the electricity price?
Divide the total electric charges on your latest bill by the total kWh used for an all-in price. State averages are useful for comparison but are not utility-specific rates.
U.S. Energy Information Administration, Electricity Retail Sales, residential average price. Latest monthly data: 2026-05; comparison baseline: 2025 annual. Verified 2026-08-05. Monthly prices can vary seasonally and are not utility-specific rates.