What it costs to run
Pick a product and we will do the arithmetic.
What it costs to run
Two appliances, the same number of hours, the same electricity rate. Change the hours, change the rate, and watch both sides move together.
Maison Alcôve Rowan Heated Throw 160 W
$0.00 0.64 kWh
A week of evenings: $0.00 3.20 kWh
Fan heater 2000 W
$0.00 8.00 kWh
A week of evenings: $0.00 40.00 kWh
Difference over the same hours $0.00
Change this to your own rate and the figures follow.
We have no dated electricity rate for this country yet, so we are showing kilowatt-hours only. Enter your own rate above and the amounts appear.
This compares two appliances running for the same length of time. It is not a comparison of your heating bill.
How this is worked out
The formula
energy_wh = power_w × (duty_cycle_pct ÷ 100) × hours cost_minor = round_half_up( energy_wh × rate_centiminor_per_kwh ÷ 100 000 ) kwh = energy_wh ÷ 1 000 rate_centiminor_per_kwh = hundredths of a minor unit per kWh 26.1 p/kWh → 2610 17.91 ¢/kWh → 1791
The same duty cycle on both sides
A thermostatically controlled appliance cycles: it does not draw its rated power continuously. Whatever cycle we apply to the throw, we apply to the comparison. When we have no measured figure from the supplier we use 100 % on both sides, which over-states our own consumption. Applying a reduced cycle to our product and 100 % to a radiator would produce a flattering gap that nobody could check.
Rounding
Every amount is calculated in whole minor units of the currency (pence, cents) and rounded half up once, at the end. A week is priced from the energy used across the week, not by multiplying a rounded evening.
Where the rates come from
| Product | Your electricity rate |
|---|---|
| United Kingdom - Ofgem price cap, Q3 2026 |
0.261 GBP/kWh Ofgem energy price cap - electricity unit rate, direct debit, national average — See the source Opens in a new window 3 August 2026 Tax included. Excludes the standing charge, which you pay whether the throw is on or not. |
| United States - EIA average residential rate, May 2026 |
0.1844 USD/kWh U.S. Energy Information Administration - Electric Power Monthly, Table 5.6.A, average residential retail price — See the source Opens in a new window 3 August 2026 Tax not included. Excludes the standing charge, which you pay whether the throw is on or not. |
What happens when a rate goes out of date
If the rate on file is more than 90 days old, this page removes every amount and shows kilowatt-hours only. A kilowatt-hour is a physical fact and does not expire. A price does.
This compares two appliances running for the same length of time. It is not a comparison of your heating bill.