Data Center Calculators
Free calculators and field references for data center operators and facility engineers. PUE, rack power density, UPS runtime, PDU load balance, raised floor load — plus NEC ampacity and Uptime tier tables.
Calculators
5
References
2
Uptime tiers
I–IV
NEC edition
2023
Calculators
References
Tip
All calculators support imperial and metric and show worked examples.
NEC derating starts at the conductor's insulation column (90 °C for
THHN), not the terminal column — then compare back to the 75 °C
terminal limit per 110.14(C). Uptime tier availability percentages
are design targets, not SLA guarantees.
RF-shielded whitespace kills your bars at the rack
The web page won't load in the cold aisle
Data Center Toolkit runs PDU load, phase balance and NEC 80% de-rate on the phone, saves each rack, and exports the row for the audit. Offline. Pay once.
CalcSpec tools are estimators for qualified facility engineers, electricians, and data center operators. Results do not replace the current NEC edition adopted by your AHJ, Uptime Institute certification, manufacturer UPS/PDU specifications, or the stamp of a licensed professional engineer.