Understand your estimate
How to use this result
Price heated bedding from separately timed preheat, selected-setting and standby modes, or a complete measured routine. Choose seasonal use days without assuming that personal warming and space heating provide the same service.
Method reviewed · Calculation methods · Evidence and source policy
Find the right inputs
Mode or sample basis
Average W and separate hours, or complete-day kWh
A maximum rating is not necessarily the average at a lower setting.
Quantity and use days
Identical appliances and chosen period days
Check whether a reading covers one side, both controls or the complete device.
Tariff and context
Currency/kWh, setting and source
Keep the product’s permitted use and timer instructions with the routine.
The calculation
Modes: daily kWh = sum average W × separate hours ÷ 1,000. Measured: daily kWh = sample kWh ÷ complete sample days. Period energy = daily kWh × quantity × use days.
A worked arithmetic example
Illustrative arithmetic: 100 W for 0.5 hours, 40 W for four hours and 0.3 W for 19.5 hours total 0.21585 kWh/day. One device over 90 days costs $3.8853 at $0.20/kWh, displayed as $3.89.
What the estimate can tell you
Captured cycling is already in the measured sample. Do not add another duty-cycle reduction. The example is a cost fixture, not permission to operate a particular blanket for those hours.
Questions about this calculation
Should I multiply a two-person blanket reading by two?
Only if the source is for one separately measured unit and you really have two identical units. A complete-device reading may already include both sides.
Can I subtract this cost from a room-heater bill?
Only with evidence that the room-heating routine changes on a comparable comfort and usage basis. The two appliances provide different services.