yCalculator

EV Range Calculator

Last updated: April 2026

Vehicle details

Petrol or diesel costs

EV costs

From April 2025, EVs pay standard VED for most cars. Adjust the road tax field if your vehicle differs.

Charging mix

Annual cost comparison

MetricPetrolDieselEV
Annual fuel£1,219£1,029£710
Annual total£2,609£2,419£1,950
vs EV saving£659£469--
CO2/year1,262kg1,246kg493kg
CostpetrolEV
Fuel cost£1,219£710
Servicing£400£150
Insurance£800£900
Road tax£190£190
Annual total£2,609£1,950

Annual saving: £659

Payback

EV purchase premium
£10,000
Annual saving
£659
Payback period
15.2 years

5-year total cost

Petrol/diesel total
£38,047
EV total
£44,752
You save
-£6,705

CO2 saving

765 kg CO2/year

Equivalent to about 36 trees absorbing carbon for a year.

Cumulative cost chart

Petrol/dieselEVNo crossover in this period

Charging sensitivity

Charging mixAnnual EV fuel cost
Home only£518/year
Mostly home£710/year
Mix 50/50£999/year
Mostly public£1,191/year
Public only£1,480/year

Is an electric car cheaper to run than petrol in the UK?

For most UK drivers who can charge at home, an electric car is significantly cheaper to run than an equivalent petrol car. The gap narrows for drivers who rely heavily on public rapid charging.

What is the total cost of ownership for an EV?

EVs typically cost more to purchase than equivalent petrol cars, but have lower running costs: cheaper fuel, lower servicing costs and, from April 2025, broadly the same road tax as petrol cars.

How much does it cost to charge an EV at home?

Charging at home on a standard tariff costs around 24.5p per kWh. A typical EV travels around 3.5 miles per kWh, giving a home charging cost of roughly 7p per mile. EV-specific overnight tariffs can reduce this further.

About this calculator

The EV Range Calculator estimates practical driving range after allowing for usable battery, efficiency, weather, heating or air-conditioning, motorway driving, and recommended reserve. It is useful for trip planning, comparing EV models, deciding charging stops, or checking whether an advertised range fits real driving. Use this expanded guide when you need more than a quick result. It explains the assumptions behind the EV Range Calculator, the records to gather, and the decisions the estimate can support. It is especially useful for EV drivers, used car buyers, fleet planners, and road-trip planners checking practical range under real conditions. The strongest use of the page is scenario comparison: change one input at a time, compare the output, and keep a note of which assumption changed.

EV Range Calculator calculation method

The calculator estimates usable battery from battery capacity and charging window, multiplies by miles per kWh, then adjusts for temperature, climate control, and motorway share. It can also estimate a recommended usable range and charging stops for a reference journey. The calculator result depends on the quality of the inputs and on the rule set or formula selected in the calculator above. For practical use, treat the output as a structured estimate: start with the core inputs, review the main outputs, then test the decision points that matter most to your situation. Key decisions include whether a trip needs a charging stop, which EV has enough usable range, how weather changes the plan.

  • usable kWh = battery capacity x usable charge window
  • base range = usable kWh x miles per kWh
  • adjusted range = base range x temperature multiplier x driving multiplier
  • better estimate = accurate inputs + correct rule set + realistic assumptions
  • scenario difference = revised result - original result

How to use the EV Range Calculator

  1. Enter battery size and usable charge window.
  2. Enter efficiency in miles per kWh.
  3. Add expected temperature and climate control use.
  4. Enter motorway driving percentage if available.
  5. Review estimated range and recommended reserve range.
  6. Run a winter motorway scenario before a long trip.
  7. Compare with charging network availability and real vehicle data.
  8. Gather the main inputs first: battery capacity, usable charge window, miles per kWh.
  9. Check supporting records such as vehicle efficiency history and battery health before relying on a final number.
  10. Enter one realistic scenario first, using conservative assumptions where the future is uncertain.
  11. Review the main outputs: base range, adjusted range, recommended range.
  12. Run at least one alternative scenario so you can see which input changes the answer most.
  13. Compare the result with vehicle manual, in-car route planner, charger network information, and manufacturer range guidance or the relevant contract, bill, statement, or professional document.
  14. Keep the calculation date and assumptions with your notes so you can revisit the estimate when rates, rules, or circumstances change.

Worked example

Winter motorway journey

Input: 60 kWh battery, 3.5 miles/kWh, cold weather, 70% motorway driving.

Calculation: Base range is adjusted down for temperature and motorway use.

Result: The practical range may be materially lower than the simple battery x efficiency estimate.

Summer commute scenario

Input: Mild weather, low motorway share, home charging each night.

Calculation: Temperature and driving multipliers are favourable.

Result: The practical range may be close to the base efficiency estimate.

Holiday load scenario

Input: Family trip with roof box, luggage, and high motorway share.

Calculation: The calculator captures motorway share but not every load detail.

Result: The driver should add extra buffer and plan charging stops conservatively.

Advertised range is not trip range

Official range figures use standard test cycles. Real trips include weather, speed, elevation, tyres, cabin heating, battery temperature, and charging reserve.

For long journeys, plan using a conservative range and leave a buffer. A charger arriving with 5% battery is very different from a daily commute ending at home.

What to check before relying on the result

A useful EV Range Calculator result starts with the same evidence you would use if you were checking the answer manually. The calculator can organise the arithmetic, but it cannot know whether a payslip is final, a bill is estimated, a quote excludes fees, or a personal circumstance has changed since the last statement.

Before making a decision, compare the calculator result with the source document that controls the real outcome. For this topic, that usually means checking vehicle manual, in-car route planner, charger network information, and manufacturer range guidance. If there is a difference between the calculator and an official statement, contract, assessment, or professional advice, treat the official document as the stronger source.

vehicle efficiency history
Use this as supporting evidence for the calculation. If it is out of date, estimated, or based on a different period, the calculator output may look precise while still being wrong for the decision.
battery health
Use this as supporting evidence for the calculation. If it is out of date, estimated, or based on a different period, the calculator output may look precise while still being wrong for the decision.
route distance
Use this as supporting evidence for the calculation. If it is out of date, estimated, or based on a different period, the calculator output may look precise while still being wrong for the decision.
weather forecast
Use this as supporting evidence for the calculation. If it is out of date, estimated, or based on a different period, the calculator output may look precise while still being wrong for the decision.
charger plan
Use this as supporting evidence for the calculation. If it is out of date, estimated, or based on a different period, the calculator output may look precise while still being wrong for the decision.

Inputs that usually change the answer

The most important input is not always the largest number on the form. Sometimes a date, threshold, percentage, eligibility flag, or timing assumption changes the result more than the headline amount. This is why scenario testing is more useful than a single calculation.

InputWhy it mattersWhat to double-check
battery capacityIt feeds directly into the estimate or changes which rule is applied.Check the period, units, eligibility, and whether the figure is final or estimated.
usable charge windowIt feeds directly into the estimate or changes which rule is applied.Check the period, units, eligibility, and whether the figure is final or estimated.
miles per kWhIt feeds directly into the estimate or changes which rule is applied.Check the period, units, eligibility, and whether the figure is final or estimated.
temperatureIt feeds directly into the estimate or changes which rule is applied.Check the period, units, eligibility, and whether the figure is final or estimated.
motorway percentageIt feeds directly into the estimate or changes which rule is applied.Check the period, units, eligibility, and whether the figure is final or estimated.

How to interpret the output

The output should be read as a decision aid, not just a number. For EV Range Calculator, the useful question is often what the result means for timing, affordability, eligibility, comparison, or next steps.

base range
Use this output alongside the other results rather than in isolation. A monthly amount, percentage, date, or payback figure can look acceptable until fees, timing, evidence, or eligibility conditions are added.
adjusted range
Use this output alongside the other results rather than in isolation. A monthly amount, percentage, date, or payback figure can look acceptable until fees, timing, evidence, or eligibility conditions are added.
recommended range
Use this output alongside the other results rather than in isolation. A monthly amount, percentage, date, or payback figure can look acceptable until fees, timing, evidence, or eligibility conditions are added.
charging stop estimate
Use this output alongside the other results rather than in isolation. A monthly amount, percentage, date, or payback figure can look acceptable until fees, timing, evidence, or eligibility conditions are added.

Scenarios worth comparing

A single estimate is a snapshot. A better approach is to save a base case, then adjust one assumption at a time. This shows whether the result is stable or whether a small change in timing, rate, usage, income, or cost creates a very different answer.

ScenarioChange one assumptionWhat the comparison shows
Base caseUse the best current evidence.Shows the result you would expect if nothing important changes.
Conservative caseUse lower income, higher cost, slower growth, or less favourable timing.Shows whether the decision still works with less optimistic assumptions.
Improved caseUse the realistic upside, such as lower cost, better rate, higher usage, or stronger evidence.Shows the potential benefit without treating it as guaranteed.

Common mistakes and edge cases

Most errors come from using the right formula with the wrong assumption. Dates can be counted differently, rates can change, official thresholds can move, and real bills or contracts often include conditions that a simple calculator cannot infer automatically.

Temperature changes range.
Check this point before using the estimate for a payment, claim, purchase, application, employment decision, or health-related decision.
Motorway speed matters.
Check this point before using the estimate for a payment, claim, purchase, application, employment decision, or health-related decision.
Reserve is important.
Check this point before using the estimate for a payment, claim, purchase, application, employment decision, or health-related decision.
Charger availability can change.
Check this point before using the estimate for a payment, claim, purchase, application, employment decision, or health-related decision.

Next steps after calculating

Once you have a result, write down the key assumptions and compare them with vehicle manual, in-car route planner, charger network information, and manufacturer range guidance. If the number affects a deadline, tax return, benefit claim, employment issue, medical question, finance agreement, or major purchase, use the calculator as preparation for a more formal check.

For lower-stakes use, the next step may simply be comparing two or three scenarios. For higher-stakes use, the next step should be checking the official guidance, speaking to the relevant organisation, or getting qualified advice before acting.

Common mistakes and edge cases

  • Cold weather can reduce efficiency and charging speed.
  • Motorway driving usually reduces miles per kWh.
  • Roof boxes, towing, and full loads can reduce range.
  • Charging from 10% to 80% is often faster than waiting for 100%.
  • Temperature changes range.
  • Motorway speed matters.
  • Reserve is important.
  • Charger availability can change.

Limitations and advice boundary

This calculator is general information only and is not safety-critical route planning advice. Use in-car navigation and live charger data for real trips. This is general information only and is not safety-critical route planning advice. The calculator is designed to support understanding and planning, but it cannot verify documents, predict future rule changes, or account for every exception. Use it as an estimate and check the official source before acting where the result matters.

  • Use the result as an estimate and keep the source documents used for the inputs.
  • Check current official guidance, contracts, bills, statements, or professional advice where the result affects a real decision.
  • Run a conservative scenario as well as the main scenario where costs, dates, rates, eligibility, or behaviour may change.
  • Check vehicle manual, in-car route planner, charger network information, and manufacturer range guidance for current rules, rates, definitions, and eligibility where relevant.
  • Do not rely on a single scenario where income, costs, dates, rates, usage, or health circumstances may change.
  • Keep records of the inputs used so that the estimate can be reviewed later.

Frequently asked questions

Why is my real range lower than advertised?

Speed, weather, heating, route, tyres, and battery condition all affect range.

Should I plan to use the full battery?

No. Keep a reserve, especially on unfamiliar routes or in cold weather.

Does driving slower help?

Often yes, especially at motorway speeds where aerodynamic drag rises.

What is miles per kWh?

It is the EV equivalent of fuel economy: how many miles the car travels per unit of electricity.

Can battery degradation reduce range?

Yes. Lower usable capacity reduces range even if efficiency stays the same.

Should I use 100% charge for long trips?

Sometimes, but follow manufacturer guidance and avoid leaving the battery full for long periods if advised.

Related calculators

  • EV Charging Cost Calculator
  • EV Battery Degradation Calculator
  • EV vs Petrol Cost Calculator
  • Electricity Cost Calculator

What does this mean?

This calculator is designed to help you understand the likely number before you make a decision or start an application.

Your result should be checked against official UK guidance, especially if your circumstances include dependants, exemptions, prior leave, or a complex immigration history.

Treat the figure as a planning tool rather than legal advice. Where the answer affects an application deadline or major payment, speak to an authorised adviser.

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