Plan fuel, cost, stops, and range with realistic inputs. Tune detours, terrain, load, and idling. Export clean results quickly.
| Scenario | Distance (km) | Efficiency | Price/L | Detours % | Terrain % | Idling (h) | Tank (L) |
|---|---|---|---|---|---|---|---|
| City-to-coast weekend | 360 | 13.0 km/L | 285 | 6 | 4 | 0.6 | 45 |
| Mountain loop | 420 | 8.3 L/100 km | 300 | 5 | 12 | 0.8 | 55 |
| Long highway run | 820 | 15.2 km/L | 275 | 3 | 2 | 0.4 | 60 |
Step 1: Convert efficiency to km/L (if needed): km_per_l = 100 / (L_per_100km).
Step 2: Combine adjustments: mult = 1 + (detours + terrain + AC + load + style) / 100.
Step 3: Driving fuel: base_fuel_L = (distance_km / km_per_l) × mult.
Step 4: Idling fuel: idle_fuel_L = idle_hours × idle_L_per_hour.
Step 5: Reserve and cost: total_L = (base + idle) × (1 + reserve/100), cost = total_L × price_per_L.
Trip distance is the primary driver of fuel. A 500 km plan at 12.5 km/L consumes 40.0 L before adjustments. If detours add 6%, effective distance becomes 530 km, pushing baseline to 42.4 L. Keeping routing accurate reduces error more than any other single field. For multi-day trips, total each leg separately
The estimator accepts both km/L and L/100 km to match dashboards. For example, 8.0 L/100 km converts to 12.50 km/L using 100 ÷ 8.0. This standardization allows consistent comparisons across vehicles and regions, and it prevents mixed-unit mistakes when sharing trip sheets. If your reading is mixed city/highway, use the blended value from the trip computer.
Five levers model real-world penalties: detours, terrain, air conditioning, load, and driving style. A combined 17% uplift applies a multiplier of 1.17 to driving fuel. On a 350 km trip at 12.5 km/L, fuel rises from 28.0 L to 32.8 L, a 4.8 L increase. Apply conservative numbers when weather or road quality is uncertain, then compare results after the trip.
Idling is often ignored, yet it can be measurable on long journeys. At 0.8 hours and 1.2 L/h, idling adds 0.96 L. With a 50 L tank starting at 60% (30 L), a 45 L total requirement implies one refill; starting at 30% can raise that to two. Reserve buffer adds another safety layer, which is valuable in remote areas and night driving.
Cost is computed from total liters and price per liter. If total fuel is 45 L, a 15-unit increase in price per liter raises budget by 675. For tight planning, update prices for the corridor you will actually buy fuel in, not only the departure city. Split the budget into planned and reserve portions to keep expectations realistic.
CO₂ is estimated using typical per‑liter factors: about 2.31 kg/L for gasoline and 2.68 kg/L for diesel. A 45 L gasoline trip reports roughly 104.0 kg CO₂. Use this metric for personal benchmarking and to compare route choices, not as an audited inventory. Pair it with liters per passenger to evaluate carpooling benefits on similar routes.
The calculator converts both formats to a single km/L basis. If you enter different values after switching, you are comparing different efficiencies, not a conversion issue.
Use small, defensible numbers. Start with detours 3–8%, terrain 0–15%, AC 0–8%, load 0–6%, style 0–6%. Review your actual trip and refine for future estimates.
Reserve is extra fuel added as a safety margin. It helps cover unplanned reroutes, long gaps between stations, or slow traffic without changing your primary efficiency assumptions.
Fill-ups are estimated from total liters required minus starting fuel in the tank, divided by tank capacity, rounded up. It is a planning indicator, not a station-by-station schedule.
No. It uses typical kilograms of CO₂ per liter for gasoline or diesel. Fuel blends, engine condition, and driving patterns affect real emissions, so treat it as a comparative metric.
Yes. CSV downloads directly from your browser. The PDF button captures the results panel and saves it as a document, suitable for trip notes and reimbursement records.
Important Note: All the Calculators listed in this site are for educational purpose only and we do not guarentee the accuracy of results. Please do consult with other sources as well.