Tool · Geographic PUE Calculator
Where you build is half the PUE story.
Cooling design + climate together determine your annual PUE. Pick a city, pick a cooling system, and see real free-cooling hours, water usage, and carbon math driven by ASHRAE envelopes and grid intensity data.
Hyperscaler hub (Google, Meta). Cold winters, hot summers.
Modern AI standard. Liquid to chip; evap cooling tower for heat rejection.
100 kW10 MW50 MW100 MW
Annual PUE
1.114
lower = more efficient
Free-cooling hours/yr
7,200
82% of year
WUE (L/kWh)
0.58
5.1 ML/yr
CUE (annual CO₂)
2,928 t
grid: 300 g/kWh
💰 Annual power cost
$537k
9.8 GWh @ $0.055/kWh
🆚 vs hyperscale (PUE 1.10)
+1.3%
About on par with hyperscale benchmark
📚 What's happening here
- • Free cooling: when outside air/water is cold enough that you don't need mechanical refrigeration. ASHRAE A1 uses outside air ≤27°C; W3 uses chilled water ≤32°C.
- • WUE: liters of water per kWh of IT load. Evap cooling trades water for power efficiency.
- • CUE: kg CO₂ per kWh, multiplied by your grid's intensity. France/Iceland win here; India/Singapore/Texas lose.
- • Real designs blend cooling modes — economize when free, mechanically cool when not. This calc weights them annually.