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P3 International

P3 International Kill A Watt EZ P4460 Electricity Usage Monitor

A plug-in meter for 120 V appliances that adds the running cost at your utility rate, with projections by hour, day, week, month and year, to the Kill A Watt's electrical readings, and keeps its totals on a backup battery.

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P3 Kill A Watt EZ P4460, front view showing a cost reading on the LCD, the buttons and the outlet
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Photo: P3 International

Key facts

Operating voltage
115 V AC
Maximum voltage
125 V AC
Maximum current
15 A
Maximum power
1875 VA
Accuracy
P3's page says within 0.2%; the manual's table gives 0.2% typical for voltage, 0.3% for current and 0.5% for watts, VA and kWh (at 90 V to 125 V and 0.2 A to 15 A), with maximums of 1% to 2%
Readings
Volts, amps, watts, VA, frequency, power factor, kWh and elapsed time, plus cost at a rate you set
Cost
Projects the cost of continued use per hour, day, week, month and year from your utility rate

Which version should you buy?

This page covers: P4460 Kill A Watt EZ, single unit.

  • Kill A Watt EZ, single unit

    This page

    Model: P4460

    What differs
    Adds on-screen operating costs, cost forecasts and battery-backed totals.
    Best for
    Seeing appliance energy use and estimated costs directly on the meter.
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  • Standard Kill A Watt

    Model: P4400

    What differs
    Shows electrical readings and cumulative kWh; calculate costs yourself. Totals reset when unplugged.
    Best for
    Measuring energy use without needing an on-screen cost estimate.

Watch out

  • P4460 EZ calculates costs on screen; P4400 shows energy use rather than money.
  • EZ retains totals through power loss; the standard P4400 resets when unplugged.
  • Pack 1 means one meter; check the quantity to avoid a two- or three-pack.

Why people pick it

  • Shows the running cost directly, from the rate you enter
  • Backup battery keeps totals through a power cut
  • ETL listed, with true RMS voltage and current per the manual

Know before you buy

  • 120 V plug-in only: 240 V appliances need another tool
  • Rated 1875 VA, which equals watts only at a power factor of 1
  • Cost figures are only as good as the rate you enter; P3 suggests averaging tiered or time-of-use rates

Full specifications

Operating voltage115 V AC
Maximum voltage125 V AC
Maximum current15 A
Maximum power1875 VA
AccuracyP3's page says within 0.2%; the manual's table gives 0.2% typical for voltage, 0.3% for current and 0.5% for watts, VA and kWh (at 90 V to 125 V and 0.2 A to 15 A), with maximums of 1% to 2%
ReadingsVolts, amps, watts, VA, frequency, power factor, kWh and elapsed time, plus cost at a rate you set
CostProjects the cost of continued use per hour, day, week, month and year from your utility rate
MeasurementTrue RMS voltage and current (manual)
MemoryBuilt-in battery backup
ListingETL listed, with over-current protection (manual)
Size5 1/8 × 2 1/2 × 1 1/2 in
Weight5 oz

From manufacturer documentation, checked November 2, 2026. Spotted an error? Tell us.

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