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Capacitor kVAR Required

The following graphic tool can be used to estimate the capacitor kVAR required to improve power factor of a single load or entire power system. Actual power factor, peak kilowatt demand and desired power factor are required. The best source for this information is the monthly utility bill or other local monitoring equipment.

Power Factor Table Calculator - Square D
Power Factor Table Calculator – Square D

A calculation of each months data for a 12 month period is recommended to determine the maximum kVAR, and optimal stages required.

Automatic Capacitor Bank Sizing


How much kVAR is required to correct an entire 480V system to a 90% power factor when the peak kilowatt demand month was 620kW at a 65% power factor?

Use the formula: kVAR = kW x kW FACTOR

From the kW FACTOR calculator below, the FACTOR is 0.685
Therefore: kVAR = 620 x 0.685 = 425kVAR

Software:Power Factor Table Calculator – Square D
Developer:SQUARE D // Schneider Electric
Size:32.5 KB
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Power Factor Table Calculator โ€“ Square D
Power Factor Table Calculator โ€“ Square D

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More Information


  1. Energy Control Systems
    Jan 27, 2021

    Whenever complex electrical calculations are involved, it is always wise to seek the assistance of a certified electrician. The calculators on this page are offered to assist in generating general estimations only.

  2. sinnadurai sripadmanabn
    Apr 02, 2015

    For PFC and for capacitor type starting of induction motors how can we calculate size of capacitor required depending on Kw & speed of motor.Are there any tables/Charts?.

  3. Shaukat Ali Khan
    Oct 22, 2014

    Nice calculations! I yet to try your sheet but I do my own calculations. Two questions arises; (1) The K VAR (capacitive) must be equal to K VAR (inductive) in power factor improvement, so shall we not to consider the total demand or connected load of the Inductive equipment in calculating K VAR out of the total demand or connected load of the entire 3-phase system??? For example the total inductive equipment’s demand load = 180 KW out of the entire demand 620 KW system must be rather taken into account? In order to have proper calculations and cost to keep to minimum and get the desire work accomplished etc. (2) Should we not consider the connected load? Or should consider only demand load…I think it should be demand load since…Please explain in length if you can?

  4. sufiyan vohra
    Aug 19, 2014

    I am creating the one excel file it have all things about the electronic and electrical engineering solutions but I need eep help some things is missing

  5. faryalrao
    Apr 11, 2013

    I really appreciate your volunteer struggle admin… thanks

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21  +    =  twenty six

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