Power Calculator for Trade Shows and Events
List your equipment, balance the load across three phases and find the right connection – free and directly in your browser.
How it works
- Enter your devicesName, power in watts (from the type plate) and quantity – or pick a device from the list. Use “+ Row” to add more.
- Choose the plugStandard devices stay on “Schuko”. Only for devices with their own CEE plug (e.g. a dishwasher) do you select the matching plug here.
- Read the resultOn the right you see the connection to order, including the distribution across L1–L3. Use “Print / PDF” to create a PDF for your stand builder or electrician.
You can leave buffer and simultaneity as they are – the defaults are the safe assumption. Your entries stay in your browser only.
Devices
| Name | Watts | Qty | Plug | Total | |
|---|---|---|---|---|---|
| Total |
Add from device list
Settings
Result
Load per phase
Distribution board: outlets
How is it calculated?
Single-phase current: I = P / 230 V. Three-phase current per phase: I = P / (√3 × 400 V). Watt values are treated as active power with cos φ = 1.
Single-phase devices are grouped into circuits of max. 16 A (incl. buffer), and the circuits are distributed across L1–L3 so that the phases are loaded as evenly as possible. Three-phase devices each get their own CEE outlet.
If a device has a CEE plug specified (e.g. a dishwasher with a red CEE 16 A plug), it gets its own outlet of exactly that size. The main connection is at least as large as the largest outlet.
The main connection is based on the most heavily loaded phase × simultaneity × buffer. Schuko is recommended for continuous loads up to 10 A only. The generator size assumes cos φ 0.8 and the most heavily loaded phase.
Planning aid without guarantee, based on the European 230/400 V grid. It does not replace planning and inspection by a qualified electrician (IEC 60364-7-711 / DIN VDE 0100-711).
Frequently asked questions about power supply.
Orders with the trade fair organiser usually have a deadline. Knowing your requirements early saves late orders and surcharges.
Which power connection does my exhibition stand need?
It depends on the total of all devices and how they are distributed across the three phases. Small stands often manage with a Schuko or CEE 16 A connection; stands with a kitchen, bar or a lot of lighting quickly need 32 A or 63 A three-phase with a distribution board. The calculator above determines the right size.
What is the difference between Schuko and CEE?
Schuko is the standard household socket in Germany and much of Europe (230 V, max. 16 A, better only up to about 10 A for continuous loads). CEE plugs are made for event use: blue for 230 V, red for 400 V three-phase, in sizes 16, 32, 63 and 125 A.
Why include a safety buffer?
Late additions by exhibitors, inrush currents of refrigeration units and deviations from the type plate almost always occur in practice. A 20 % reserve is a proven rule of thumb.
Does the calculator replace an electrician?
No. The calculator is a planning aid for ordering and coordination. Installation, testing and acceptance of the electrical system belong in the hands of a qualified electrician. We are happy to coordinate with the trade fair organiser and the electrical contractor.