Rack Capacity
Build your rack equipment by equipment and instantly get the used U, the power, the thermal dissipation (BTU/h), the weight and the current you will need. All the calculation happens in your browser.
Space occupancy
Summary by equipment
| Equipment | U each | Qty | Total U | Total W | Total kg |
|---|---|---|---|---|---|
| Total | — | — | — | — | — |
Current estimated at 220 V (standard in Chile: 220 V / 50 Hz). Dissipation uses 1 W = 3.412 BTU/h. Consider a safety margin and the actual cooling of your room.
Runs locally in your browser · no sign-up · nothing leaves your browser
How it works
The calculator builds a rack inventory device by device (height in U, quantity, power in W and weight in kg per unit) and totals four dimensions at once: space (used U = Σ U × quantity, against 24, 42, 45, 48 or any size you define, up to 60U), total power in W and kW, total weight and estimated current at 220 V (A = W / 220, the 220 V / 50 Hz standard used in Chile).
It also converts electrical consumption into heat load with the factor 1 W = 3.412 BTU/h: practically all the energy the equipment draws ends up as heat the air conditioning must remove. The occupancy meter warns when the rack passes 85 % and turns red when the equipment does not fit (used U greater than the total).
Example: 42U rack with a switch, patch panels, servers and a UPS
- Space: 1 switch (1U) + 2 patch panels (1U each) + 2 servers (2U each) + 1 UPS (2U) = 9U used, leaving 33U free (21 %).
- Power:
65 + 0 + 2×450 + 300 = 1265 W≈ 1.27 kW. - Heat:
1265 × 3.412 ≈ 4316 BTU/hto be removed. - Current:
1265 / 220 ≈ 5.8 A, and total weight adds up to 67 kg.