Energy calculators
Do the maths before you spend
Quick, honest estimates for the decisions that affect your electricity bill — from a new air-conditioner to a full solar setup.
ARMS bill checker
See how your units fall into Malta's tariff bands and why your bill jumped.
Open calculatorSolar savings
Estimate system size, generation, savings and payback for a PV system on your roof.
Open calculatorAppliance running cost
Work out what any appliance costs to run per hour, per month and per year.
PreviewAir-conditioning cost
Estimate the real cost of cooling or heating your home across a season.
PreviewEV savings
Compare home EV charging costs with petrol or diesel and see your yearly saving.
Open calculatorBattery size
Find out roughly what size home battery suits your electricity use and backup needs.
Open calculatorOur approach
How our calculators work
Transparent assumptions
Every calculator shows the tariff and usage assumptions behind its estimates, and lets you adjust them.
Built on Malta's tariffs
Calculations use current ARMS residential tariffs and local conditions, not generic international figures.
Indicative results
Estimates are a starting point for decisions — always confirm specifics with your bill or a professional.