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The number most households have never worked out

Fuel is usually paid for in small, forgettable amounts — which is exactly why the annual figure surprises people. The calculator above turns a habit into a number, and that number is often larger than several bills the household worries about far more.

Once you have it, it becomes useful in three specific ways.

1. It prices the generator habit — which decides the solar question

If you run a generator through power cuts, that fuel is the single biggest input into whether a solar system pays for itself.

The payback equation is simple: upfront cost ÷ the money it saves each month. Generator fuel you would stop buying is a genuine offset; usage you never had is not. Run your real generator consumption through this calculator, then take that monthly figure to the solar and borehole payback framework before you accept any installer's estimate.

Households routinely buy solar on frustration after a bad week, and just as routinely underestimate the fuel they were already burning — which means the honest payback is often better than they assume. Either way, the arithmetic should decide it.

2. It changes what a vehicle actually costs

Fuel consumption over several years can exceed the price difference between two vehicles. So when comparing cars, compare total cost of ownership rather than purchase price:

• Model your genuine weekly distance here — not an optimistic one;
• Add insurance, licensing, servicing and tyres;
• Add finance costs if you are borrowing — see the vehicle finance calculator, and note that a depreciating asset funded at monthly-rate credit is a compounding loss;
• Then judge the two vehicles.

The practical Zimbabwean caution: parts availability usually matters more than the badge. A model widely driven here has cheap, available parts and mechanics who know it. See buying a car in Zimbabwe.

3. It makes a real budget line visible

Transport is one of the largest and least examined household costs. With the annual figure in front of you, the levers become obvious — and unlike most budget cuts, several are painless:

• Combining trips — the single easiest saving;
• Sharing transport for a regular journey, including the school run;
• Choosing where you live with transport counted. Cheaper rent an hour further out is frequently more expensive once fuel and time are included — test the whole housing cost, not just the rent. See renting in Zimbabwe;
• Keeping the vehicle serviced, since consumption worsens as maintenance slips.

Whatever you free up, move it deliberately — into an emergency fund or against expensive debt — rather than letting it be absorbed. And move it in one transfer a month, since IMTT at 2% applies per electronic movement.

Frequently asked questions

What pump price should I use?

The price you actually paid most recently. We deliberately do not publish a fuel price — it moves, and a stale figure would mislead your whole budget.

How do I find my vehicle's consumption?

Fill the tank, note the odometer, drive normally, then refill and record the litres used against the distance. Two or three cycles give a realistic average — manufacturer figures are usually optimistic against real conditions.

Should I include the generator?

Yes, if you are working out household energy costs — and that figure is exactly what the solar payback calculation needs.

Does this help with a business?

Very much. If you deliver or travel to customers, fuel is a direct cost that belongs in your pricing — one of the overheads most commonly left out. See the side-business money guide.

Fuel prices change and are deliberately not published here — use your own most recent pump price. General information, not financial advice.