Home › Calculators
Free calculators
Instant answers to the sizing questions that decide what you pay. No sign-up, no email, no waiting for someone to ring you back.
CCTV storage
The hard disk size you need, and how many days of recording any disk holds.
Open CCTVCCTV installation cost
A price range for your property before you ask anyone for a quote.
Open SolarSolar savings & subsidy
From your KSEB bill: the solar size you need, what it saves, your bill after solar and the PM Surya Ghar subsidy.
Open PowerInverter backup time
How long your battery runs the fans, lights, TV and fridge, and the inverter size you need.
OpenCommon questions
Do I have to give my email?
No. Nothing here asks for a name, a number or an email. Answer a few questions and the result is there.
How accurate is the answer?
Close enough to tell whether a quote you have been given is sensible, and to stop you buying a disk that runs out in nine days. Not a substitute for someone standing on your roof or walking your compound.
Can I change the assumptions?
Each calculator shows how it works out its answer. The CCTV storage calculator also takes your cameras' real bitrate if you know it.
Will you just do it for me?
Gladly. A free site visit gets you a written fixed-price quote with the retention in days, the system size in kW, or whichever number you were trying to work out.
Want the real number for your property?
A calculator cannot see your cable runs, your roof or how much moves in front of your cameras. We survey and put it in writing — free, no obligation.