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EV vs gasoline cost comparison

Two columns — petrol car and EV — then a trip or monthly distance. See which costs less per 100 km and how much you save (or spend extra).

Defaults to your region. Switch to compare any other scale.

Gasoline / petrol

Electric vehicle (EV)

Result

114.75

You save 114.75 with EV

per month · 64.286%

  • Gasoline cost178.50
  • EV cost63.75
  • Saving (gas − EV)114.75 (64.286%)
  • Gas cost / 100 km11.90
  • EV cost / 100 km4.25
  • Gas cost / 100 mi19.15
  • EV cost / 100 mi6.84
  • Gas arithmetic7 → 7 L/100 km; (7/100) × 1.7 × 1,500 = 178.50
  • EV arithmeticWh/km = 17 × 10 = 170; (170/1000) × 0.25 × 1,500 = 63.75
  • Distance used1,500 km (= 1,500 km)
  • Gasoline / year (×12)2,142.00
  • EV / year (×12)765.00
  • Saving / year (×12)1,377.00 (= 114.75 × 12)

EV is cheaper for this scenario

Gas 7 L/100 km @ 1.7/L · EV 17 kWh/100 km @ 0.25/kWh. (7/100) × 1.7 × 1,500 = 178.50 vs (170/1000) × 0.25 × 1,500 = 63.75.

About this tool

Running-cost comparison converts each vehicle to a common distance basis. Petrol uses L/100 km (from km/L or US/UK MPG via NIST gallon factors). The EV side uses Wh/km (from kWh/100 km, km/kWh, MPGe, and related units).

Cost for a distance = (consumption per km) × price × kilometres. Monthly mode multiplies by 12 for a simple yearly projection. Home overnight electricity is often cheaper than pump fuel; public DC fast charging can narrow or reverse the gap.

Figures are educational illustrations — not purchase advice. Pair with the dedicated EV efficiency and fuel cost calculators for unit conversion detail.

Formula

  • Gas: L/100 km → cost = (L/100 km ÷ 100) × price_per_L × km
  • EV: Wh/km → cost = (Wh/km ÷ 1000) × price_per_kWh × km
  • L/100 km = 235.214583 ÷ MPG(US) = 282.480936 ÷ MPG(UK)
  • kWh/100 km = Wh/km ÷ 10
  • Saving = gas_cost − EV_cost; % = saving ÷ gas_cost × 100
  • Yearly (monthly mode) = monthly × 12

How it is calculated

  1. Fill the gasoline column (consumption + price) and the EV column (consumption + kWh price).
  2. Convert gas to L/100 km and EV to Wh/km using the shared NIST/EPA helpers.
  3. Enter distance (km or mi) and choose one-time trip or monthly.
  4. Cost = consumption_per_km × price × kilometres; saving = gas − EV.
  5. In monthly mode multiply each cost and the saving by 12 for yearly totals.

Questions

How is the saving calculated?

Saving = gasoline cost − EV cost for the same distance. A negative value means the EV costs more; we label that as “EV costs more by …”. Percent saving = saving ÷ gasoline cost × 100.

Why monthly × 12 for yearly?

Monthly mode treats your distance as a typical month and multiplies costs and saving by 12 for a simple annual projection. It ignores seasonal swings (winter EV efficiency, holiday trips).

Home charging vs public DC?

Enter the electricity price you actually pay. Overnight home rates are often far below pump fuel per kilometre; highway DC fast charging can be several times the home rate and may erase the EV advantage.

Are the results official advice?

No. Calculate This is an educational tool. For important decisions, check primary sources or ask a qualified professional.

Sources

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