Calculators
Engineering-grade UPS calculators.
Three free tools that follow the same methodology our engineers use on paid site assessments. Results are conservative ballparks: a real specification always involves a site visit, but these get you to a fundable budget number in under five minutes.
Pre-spec
UPS Sizing Calculator
Add your connected loads and get a recommended UPS rating, headroom, and topology in seconds. Output respects 25% growth allowance and conservative power factor.
Open calculator →Sizing
Battery Runtime Calculator
Estimate runtime under partial-load and full-load conditions for VRLA and lithium batteries. Includes Peukert / discharge-curve derating.
Open calculator →Lifecycle
Battery Replacement Cost Calculator
Indicative replacement cost for VRLA generic, OEM cartridge, and lithium upgrades. Includes labour and recycling fees per AS Battery Stewardship.
Open calculator →Engineer review
Want a validated specification?
Calculator outputs are a pre-spec ballpark. For a real fundable proposal we run a site assessment that factors inrush, harmonics, redundancy class and the compliance pathway. Free for accredited customers.