TSN practical tools

Give your fuel
budget some clarity.

Turn a change at the pump into a monthly cost in your currency. Compare today’s cost with your own price scenario before changing your budget.

Calculate your costs Free to use · No sign-in needed

01 / Your assumptions

What do you spend on fuel?

Enter the price on your receipt or your supplier’s quote. No live prices or official forecasts are loaded.

CurrencyLabels amounts only. No exchange-rate conversion; enter prices in this currency.Measurement systemSwitching systems converts your existing quantities and per-unit prices.

Fuel typeA label for your calculation; changing the grade does not change your entered price.

How would you like to estimate usage? Monthly litres Distance & efficiency

Monthly fuel use (litres)Use your total monthly fuel volume, not your tank capacity.Current price (ZAR/litre)Use the price you actually pay, including applicable taxes. Diesel retail prices vary.

Price-change scenario (ZAR/litre)Use -0.38 for a decrease of 0.38, or 1 for an increase of 1 per fuel unit.Stress increase (ZAR/litre)An increase above your current price, separate from the change scenario.

02 / Your monthly picture

See what changes.

Petrol 95 · Add your assumptions to calculate

Start with your current price.

Complete all active fields with valid numbers. Price must be above zero, usage and stress cannot be negative, and your scenario price cannot be below zero.

Know your numbers

A scenario is a planning tool.

Monthly fuel volume × price per unit = monthly cost. Metric usage = kilometres × L/100 km ÷ 100. Imperial usage = miles ÷ miles per gallon. US and UK gallons differ: 1 US gallon = 3.785411784 litres; 1 UK gallon = 4.54609 litres. Currency formatting follows its standard decimal precision. Unit conversions retain up to 12 significant digits.

Use the result carefully

Illustrative starting usage and a one-unit currency stress increase are editable assumptions, not forecasts.
Enter a net price change. Do not deduct levy relief again if it is already included.
The estimate holds usage constant and excludes tolls, maintenance, finance and other vehicle costs.
Only the calculation runs in your browser. Your entered figures are not submitted or saved by this tool.

Put the numbers in context

Relief. Risks. Your budget.

Read our dated South African analysis of the November 2026 outlook and temporary levy relief. Check the official adjustment before making commitments.

Read the fuel outlook

Need clearer records for business decisions? Explore TSN’s Excel special.