Rack Book
Preview Rack Book Plus is $1.95 a month or $19.50 a year and is free during preview. Nothing is charged. Pricing

Server closets · network racks · homelabs

Plan the rack before you lift the server.

Server City lays out your rack unit by unit, heaviest gear low, and adds up what it means: amps on the circuit, heat for the room, weight on the rails and minutes on the UPS. Then it tells you plainly what will not work.

Rack Book Plus $1.95 a month or $19.50 a year · Free during preview · what it buys

No account, no email. Every tool is free; Rack Book Plus saves up to 25 racks.

Example: 12U office closet12U · 120 V · 20 A breaker
1 2 3 4 5 6 7 8 9 10 11 12 UPS 1500VA/1000W (2U) Server 2U (2U) NAS 4-bay (2U) Firewall PoE switch Patch panel
Load
740W
Current on 120 V
6.2A
Heat
2,525BTU/h
Weight
141lb
Free space
3U
Breaker share
31%

740 W on a 20 A circuit at 120 V, under the 80% line. Placed by the planner: the patch panel and switch pinned at the top, the rest heaviest first from U1 up.

Open the planner

The tools

Three tools, one rack

Rack plannerRack height, devices with their U, watts and weight. Pin the ones that must sit at a certain U; the rest are placed heaviest first, lowest free space first. You get a drawn front view, totals and flags: overlaps, no room, heavy gear above light, a breaker past 80%. Power and coolingWatts to amps at 120, 208 or 230 V, measured against the 80% continuous-load line of a 15, 20 or 30 A breaker, and to BTU per hour and tons of cooling for the room. UPS runtimeAn estimate of minutes on battery from the battery bank's volts and amp-hours, and the VA and watt ratings a UPS should have for the load, with headroom.

Pricing

Prices

Free

$0

  • Rack planner, power and cooling, UPS runtime: every tool, no limit
  • A private Rack Book holding 1 saved rack
  • Printable rack sheet

Rack Book Plus

$1.95 a month

or $19.50 a year (two months free)

  • Up to 25 saved racks in one book (closets, sites, the lab at home)
  • Site totals: watts, amps, heat and weight across every rack
  • CSV export of every device and its position
  • Duplicate a rack to try another layout

Free during preview: every Rack Book Plus feature is on for everyone and nothing is charged.

Pricing in full

What this is not

Server City sells nothing but its own Rack Book Plus: no servers, no hosting, no installation. Its numbers come from what you type and from standard conversions; they are estimates, not an electrician's or engineer's sign-off. Check the labels on your equipment and the ratings from your rack and UPS makers.