Enter the Surface Tension, Tube Diameter, Contact Angle, and Fluid Properties into the Surface Tension Calculator to find the Capillary Rise, Surface Energy, Pressure Difference, and Meniscus Shape.
Estimated Runtime
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Runtime (Hours)
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Load Percentage
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Available Battery Energy
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This calculator provides estimates based on standard battery performance and UPS efficiency ratings. Actual runtime may vary by ±15% depending on battery condition, temperature, and actual load characteristics.
Several factors can reduce runtime: aging batteries lose capacity over time, high temperatures reduce battery performance, and some devices have power spikes during startup that weren't accounted for in the calculation.
VA (Volt-Amperes) is the apparent power capacity, while Watts is the real power. Most UPS systems can deliver about 60-70% of their VA rating in watts. Always check both ratings when sizing your UPS.
Most UPS batteries should be replaced every 3-5 years for optimal performance. In hot environments or with frequent power outages, replacement may be needed sooner. Battery age significantly impacts runtime.
Yes, but stay within both the VA and watt limits of your UPS. Adding more devices reduces runtime proportionally. It's recommended to keep total load under 80% of UPS capacity for best performance.
Overloading a UPS can cause it to shut down immediately, transfer to bypass mode, or in severe cases, damage the unit. Always ensure your total load stays within the UPS ratings.
Yes, UPS efficiency is crucial for runtime calculations. A more efficient UPS wastes less energy as heat, leaving more battery power available for your connected devices, thus extending runtime.
Check device labels, power adapters, or specifications for wattage. For computers, use manufacturer specs or power meters. Add up all connected devices, including monitors, routers, and other equipment.