Power factor calculator for kW, kVA, PF and cos phi

Use this power factor calculator to calculate PF from kW and kVA, kW from kVA and PF, or kVA from kW and PF. The page also explains cos phi, real power, apparent power and related electrical tools.

P232 TELETEXT-TOOLS 232 Wed 01 Jan
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TELETEXT-TOOLS
POWER FACTOR
POWER FACTOR CALCULATOR • kW • kVA • PF • cos φ
REAL POWER • APPARENT POWER • MOTORS • GENERATORS • UPS • ELECTRICAL LOADS
232
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POWER FACTOR CALCULATOR

Calculate PF, kW or kVA from two known values.

RESULT
—
Power factor = real power ÷ apparent power, so PF = kW ÷ kVA.
NEXT shows examples, formulas, help and related electrical pages.
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QUICK PRESETS

Tap a common electrical load example.

80 kW / 100 kVA001 45 kW / 50 kVA002 125 kVA × PF .8003 60 kVA × PF .95004 90 kW at PF .9005 30 kW at PF .75006 18 kW / 24 kVA007 200 kVA × PF .85008
USES
motors • UPS • generators • inverters
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WHAT THIS TOOL IS FOR

A simple PF, kW and kVA calculator.

PAGE 232 PURPOSE

Use this power factor calculator to work with real power, apparent power and power factor values in common electrical examples.

WHO USES IT

Useful for electricians, students, engineers, generator sizing, UPS checks, motor loads, inverters, pumps, compressors and HVAC equipment.

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KEY FORMULAS

PF, kW and kVA relationships.

PF
PF = kW ÷ kVA
kW
kW = kVA × PF
kVA
kVA = kW ÷ PF
cos φ
PF is often written as cos phi

QUICK MEMORY AID

Power factor compares useful real power with total apparent power. A value closer to 1 usually means better use of current.

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REAL • REACTIVE • APPARENT

Electrical power basics in plain words.

REAL POWER kW

Real power does useful work: turning motors, heating elements and powering the load.

APPARENT POWER kVA

Apparent power is the overall demand seen by the source, including useful and reactive effects.

REACTIVE POWER kVAr

Reactive power is linked to magnetic or electric fields in inductive and capacitive loads.

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COMMON SEARCHES

Search-intent examples covered by this page.

SEARCH
power factor calculator
SEARCH
kW to kVA calculator
SEARCH
kVA to kW calculator
SEARCH
cos phi calculator

EXAMPLES

80 kW on 100 kVA gives PF 0.8. 125 kVA at PF 0.8 gives 100 kW. 90 kW at PF 0.9 needs 100 kVA.

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RELATED TOOLS

Parent hub, sibling converters and nearby tools.

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SUMMARY + RETURN

Power factor calculator page 232: kW, kVA, PF and cos φ.

KEYWORDS COVERED

power factor calculator, kW to kVA, kVA to kW, PF formula, cos phi calculator.

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