How do you convert MW to MVA?
Divide real power in MW by the power-factor magnitude. A 100 MW electrical load at 0.95 power factor is approximately 105.26 MVA before any planning allowance.
- Load MVA = MW ÷ power factor.
- Planning MVA = load MVA × (1 + allowance percent ÷ 100).
- Balanced three-phase current in amps = MVA × 1,000 ÷ (√3 × line-to-line kV).
- At 105.26 MVA and 34.5 kV, line current is approximately 1,761.56 A.
MW to MVA examples for project planning
At 0.95 power factor, 40 MW equals about 42.11 MVA and 100 MW equals about 105.26 MVA. At 0.90 power factor, 40 MW equals about 44.44 MVA. These values describe load; the project engineer selects the transformer rating and operating arrangement.
Is data-center IT load the same as transformer load?
No. IT load alone can leave out cooling and other facility loads. Use the electrical demand that the transformer will actually carry, based on the project load schedule. Do not add facility overhead a second time if it is already included.
Does this result select a transformer?
No. It establishes a load estimate. The project engineer must determine the unit rating, cooling stage, loading limits and operating arrangement.
- Confirm normal and contingency loading. An allowance does not provide N+1 redundancy.
- Match high and low voltages, vector group, frequency, taps, impedance and grounding.
- Review harmonics, ambient temperature, altitude and load profile.
- Check each cooling-stage rating and any separate step-up or step-down duty limit.
- Confirm current availability, included accessories, testing and delivery dates in writing.
kVA versus MVA: convert the units before comparing capacity
1 MVA equals 1,000 kVA. Divide kVA by 1,000 to get MVA: 500 kVA is 0.5 MVA, 2500 kVA is 2.5 MVA and 10,000 kVA is 10 MVA. These are unit conversions, not final equipment selections; cooling stages and project operating requirements still apply.
Connect the technical check to a purchase request
Use the actual source/output voltages and duty-specific MVA to estimate nominal line current, then compare the candidate's records against the approved design. A calculation is a screening aid; cooling stages, operating direction, fault duty and equipment interfaces still require their own review.
Common questions
Written quotes and supporting records control unit-specific ratings, availability, condition, price, and delivery.
How do I convert kVA to MVA?
Divide kVA by 1,000. For example, 2500 kVA equals 2.5 MVA. Converting the unit does not establish the equipment's usable cooling-stage rating or suitability.
Does 100 MW mean a 100 MVA transformer?
Only the power conversion is 100 MVA at unity power factor. At 0.95 power factor, the same 100 MW is approximately 105.26 MVA. Final transformer sizing also considers operating and site requirements.
Does the calculator add a safety margin automatically?
No. The default allowance is zero. Your project team can enter an explicit planning allowance, which remains separate from the original load estimate.
Can I divide the result between parallel transformers?
Do not assume equal load sharing or compatibility. Your engineer must check parallel operation, individual loading and contingency arrangements.