Fuel Price Calculator for South Africa (Petrol & Diesel)

Fuel cost calculator and petrol cost estimator, explained

This tool is both a fuel cost calculator and a fuel cost estimator. It helps you plan day-to-day driving, road trips, and monthly budgets by combining:

• your fuel price (Inland or Coastal, or manual override),
• how many litres you want to buy (fill-up), and/or
• distance and fuel consumption (trip planning)

South Africa’s official fuel prices are adjusted monthly, and official updates are published by the Department of Mineral Resources and Energy (DMRE).

How to calculate cost of petrol per km (quick method)

If you want to calculate the cost of petrol per km, here’s the simplest way:

1. Take your vehicle consumption in L/100 km
2. Divide by 100 to get litres per km
3. Multiply by the petrol price per litre.That gives you R per km.

Example: 7.0 L/100 km ÷ 100 = 0.07 L/km0.07 × R23.50/L = R1.65 per km

“Calculate petrol price” vs “calculate petrol cost”

People often search “calculate petrol price” when what they really need is the cost of a fill-up or trip. The petrol price itself is the input (what you pay per litre). This page helps you turn that price into a practical answer:

• How much will this fill cost?
• How much will my trip cost?
• What’s my cost per kilometre?

Tips to get the most accurate estimate

• Use your car’s real-world consumption (often higher than brochure figures).
• For trips, include city driving, hills, wind, and traffic in your expectations.
• If you’re at the pump and the displayed price differs, use manual override.