Enter the capacity of the backup system and the power consumed by the devices into the calculator to determine the backup time. This calculator can also evaluate any of the variables given the others are known.

## Backup Time Formula

The following formula is used to calculate the backup time.

BT = C / P

Variables:

- BT is the backup time (hours)
- C is the capacity of the backup system (Watt-hours)
- P is the power consumed by the devices (Watts)

To calculate the backup time, divide the capacity of the backup system by the power consumed by the devices. The result will be the duration for which the backup system can provide power in the event of a primary power source failure.

## What is a Backup Time?

Backup time refers to the duration for which a backup power source, such as an Uninterruptible Power Supply (UPS) or a generator, can provide power in the event of a primary power source failure. This time depends on the capacity of the backup system and the amount of power being consumed by the devices connected to it. It is crucial in scenarios where continuous power supply is necessary, such as in data centers, hospitals, and other critical infrastructures.

## How to Calculate Backup Time?

The following steps outline how to calculate the Backup Time using the formula BT = C / P.

- First, determine the capacity of the backup system (C) in Watt-hours.
- Next, determine the power consumed by the devices (P) in Watts.
- Next, gather the formula from above = BT = C / P.
- Finally, calculate the Backup Time (BT) in hours.
- After inserting the variables and calculating the result, check your answer with the calculator above.

**Example Problem:**

Use the following variables as an example problem to test your knowledge.

Capacity of the backup system (C) = 500 Watt-hours

Power consumed by the devices (P) = 50 Watts