Compare calculators
Both calculators run independently β change the inputs on either side to compare results.
Electrical
Battery Backup Time Calculator
Find out how long a battery bank will power your equipment during an outage, given voltage, capacity, and inverter efficiency. Ideal for sizing UPS systems, off-grid setups, and emergency power installations.
Fill in the required fields to see your result.
Electrical
LED Series Resistor Calculator
Finds the correct series resistor value and power rating to safely drive one or more LEDs in series from a given supply voltage. Use it whenever you connect LEDs to a voltage source without a dedicated driver.
Fill in the required fields to see your result.
Key differences
| Battery Backup Time Calculator | LED Series Resistor Calculator | |
|---|---|---|
| Category | Electrical | Electrical |
| Inputs required | 4 | 4 |
| Result | Backup Time (hours) | Series Resistance (Ξ©) |
| What it does | Find out how long a battery bank will power your equipment during an outage, given voltage, capacity, and inverter efficiency. Ideal for sizing UPS systems, off-grid setups, and emergency power installations. | Finds the correct series resistor value and power rating to safely drive one or more LEDs in series from a given supply voltage. Use it whenever you connect LEDs to a voltage source without a dedicated driver. |