December 3, 2025 - This convenient calculator gives you the estimated runtime for any of our UPS models, showing you the total load in watts and the runtime in minutes.

Manual/Generic Calculator: Calculate the estimated run time or battery backup time of any uninterruptible power supply (UPS) using the load in watts, the device load (in watts), number of batteries, battery voltage, and battery amp hours.

Use the calculator above to estimate runtime based on your specific load. For example, a 1000VA UPS typically provides 6-10 minutes at 50% load (500W).

Find the perfect UPS system in two easy steps! Calculate the total power consumption of connected devices then choose a runtime so get your recommendations.

March 14, 2025 - The UPS Runtime Calculator works out the runtime you will get for any UPS battery configuration. Just enter the load, the battery capacity and quantity.

Calculate how long your UPS will run during a power outage. Enter your UPS power supply capacity and load to get accurate runtime estimates.

Use this calculator to estimate how long a 1000VA UPS can power your devices during a power outage. Just input the wattage of your load below. Connected Load (Watts): Enter the total wattage of your connected devices Calculate Runtime

July 29, 2025 - If given in Ah, convert it using: Formula: Watt-Hours (Wh) = Amp-Hours (Ah) × Voltage (V) ... UPS systems are not 100% efficient. Multiply runtime by the efficiency rating (typically 0.8–0.95).

Divide usable watt-hours by load watts. Convert hours to minutes. Runtime hours = (Battery voltage x Battery Ah x Efficiency x Derating) ÷ Load watts ... A 1000VA UPS often supports a light router/NAS load ...

November 4, 2024 - 1000W (1000VA * 1). he load ratio is the percentage of the UPS’s capacity that your equipment will use. This is calculated by dividing the total power consumption of your equipment by the UPS’s real power capacity.

Runtime, sizing (kVA/kW), and battery capacity — all in one UPS calculator.

Calculate how long your APC UPS will run during a power outage. Enter your UPS capacity and load to get accurate runtime estimates for your battery backup system.

This calculator helps you find out the amount of time that the UPS will be able to keep the connected equipment running in the event of a power failure. ... Runtimes based on testing fully-charged, new batteries at normal operating conditions.

APC Smart-UPS Runtime Chart for SUA Models.

How Much Power Will Your UPS Use? Choose the right UPS, uninterruptible power supply, based on your total power consumption, Eaton UPS Selector

September 28, 2024 - This guide teaches you how to estimate the uninterruptible power supply hours your system can provide and how to maximize your UPS operation time.

July 3, 2024 - Start by calculating the total load from all the devices in watts. You can refer to the formula Wt = W1 + W2 + W3… · Consider the discharge curve of the manufacturer. Interpolate the runtime on the discharge curve from the load.

Server Room Environments offers UPS sizing guides and calculators in VA, kVA, Watts, and kW for server room and data centre power needs!

These interactive runtime graphs make it easy to see the amount of battery runtime available with or without optional battery packs. Click your UPS below for runtimes.

December 1, 2024 - Utilize Online Tools Many UPS manufacturers offer online calculators to estimate runtime based on device load and UPS specifications. These tools simplify the process and provide more accurate results. To get the most out of your 1000VA UPS, follow these best practices: