Free Electrical Calculators
Use our free electrical tools to estimate costs, check your panel capacity, and find the right service — no registration needed.
Electrical Load Calculator
Calculate if your DB box can safely handle new appliances like EV chargers, air-conditioning units, or hot tubs.
Electrical Service Finder
Answer 5 quick questions to identify the right electrical service for your situation — from emergency repairs to new installations.
LED Savings Calculator
See how much you can save on your TNB electricity bill by switching from incandescent or CFL bulbs to LED lighting.
Why Use Our Free Tools?
No Sign-Up Required
Use all tools instantly. No email, no account, no waiting.
Malaysia-Specific
Calculations use Malaysian voltage standards (240V), TNB electricity rates, and local pricing.
Built by Electricians
Our tools are built using real-world knowledge from our team of Suruhanjaya Tenaga certified electricians.
Have Questions After Using Our Tools?
Our licensed electricians are available for site visits and free consultations across the Klang Valley.