PowerCost LabCalculate now ↗

Countries · ZAR

Electricity-cost calculators for South Africa

Use South African rand, your own tariff, and device-specific operating models—without pretending one national average fits every household.

Billing context

Use the rate that changes with consumption.

Charges vary by municipality, distributor, connection type, tariff category, block, and season. NERSA approvals do not translate into one national household unit rate.

Verified reference · Confidence A 99/100ZAR 3.4361/kWh

Homelight 60A, Eskom direct supply. Effective 2026-04-01 to 2027-03-31. Your own marginal bill rate remains the better input when your plan differs.

Source: Eskom schedule of standard prices 2026/27 ↗

ZAR calculator

Start with any appliance.

A current official reference is prefilled. Edit it when your utility, plan, usage tier, tax treatment, or bill differs.

01

Your scenario

Change any value. Results update instantly.

Active runtime accounts for cycling. Use 100% for devices that draw the rated power continuously.

02

Your reading

Planning estimate · based on your inputs
Estimated monthly costZAR 50.03

Likely planning range ZAR 45.03–ZAR 55.03

Per dayZAR 1.64
Per active hourZAR 0.41
Per yearZAR 600.36
Energy / month14.6 kWh

FormulakW × runtime × tariff

Month52 weeks ÷ 12

Data qualitySelf-entered estimate

Local high-intent tools

Built for South Africa

These pages combine the device model with local billing structure, a current source, and market-specific checks.

Local calculator

Electric heater

Winter space-heating cost varies with Eskom or municipal supply, tariff category, prepaid structure, dwelling heat loss, and thermostat runtime.

Calculate local cost ↗Local calculator

Water heater

Electric geysers can be major household loads because tank losses, thermostat settings, hot-water demand, and tariff blocks accumulate every day.

Calculate local cost ↗

Need another market?

Browse all launch countries →

Calculation standards

Visible inputs. Reproducible results.

WhoPowerCost Lab's research desk maintains the formulas, market notes, and worked examples.

HowEnergy, tariff, and behavioural assumptions stay separate so readers can replace one input without hiding the others.

WhyThe page exists to answer an operating-cost decision. Advertising never changes a formula, default, or recommendation.