FireSecure Tools
Engineering Tools for Life Safety Systems
Home
DIP
Volt drop
PoE
CCTV storage
Ohm’s law
Battery (BS5839)
Ohm’s law + power solver
Enter any
two
values and calculate the rest.
Voltage V (V)
Current I (A)
Resistance R (Ω)
Power P (W)
Calculate
Notes: These calculators are for engineering estimation / planning. Verify critical results with standards, manufacturer data, and site measurement.