EV & Energy Calculators
Practical tools for electric vehicle owners and energy-conscious drivers. Estimate charge times, plan trip costs, and calculate electricity expenses — instant results, no account needed.
EV calculators
What each tool does
| Calculator | What you solve |
|---|---|
| EV Charging Cost | Battery capacity + start/target charge % + electricity rate → exact kWh added, total cost, and optional range gained. |
| EV vs Petrol | Monthly km + EV consumption + electricity rate + petrol price + fuel economy → monthly and annual running cost savings. |
| EV Trip Planner | Trip distance + battery + current charge % + consumption → energy needed, available range, and whether a charge stop is required. |
| EV Charging Time | Battery capacity + current charge level + charger power → time to full charge, with a visual charge progress bar. |
| EV Range & Cost | Battery capacity + efficiency + electricity rate → total range, range per kWh, and cost per 100 km or per mile. |
| kWh to Euro | Energy consumption (kWh) + electricity tariff → exact cost in euros or any currency. Works for EV charging, appliances, and solar payback. |
| Solar Panel Output | Panel wattage + number of panels + peak sun hours + efficiency → daily, monthly and yearly kWh output with estimated annual savings at your tariff. |
| Solar Hub | Panel-sizing reference, peak sun hours by region (EU + US), battery / inverter sizing cheat sheet, and the full sizing workflow for grid-tied, hybrid and off-grid setups. |
When to use these tools
- Before a road trip — estimate how long to charge and what the electricity will cost
- Comparing home charging vs public charging tariffs
- Calculating monthly charging cost based on your driving habits
- Checking whether your EV range covers a planned route
- Estimating charging time when using a slower home outlet vs fast charger
Frequently Asked Questions
How accurate is the EV charging time estimate?
The charging time calculator gives a reliable estimate for the core charging window — from your current state of charge to your target level. In practice, most EVs use CC/CV charging (constant current followed by constant voltage): they charge at full charger power up to around 80%, then taper off to protect the battery. The calculator models this taper, so estimates are realistic for real-world use. The exact speed also depends on battery temperature and the car's onboard charger limit, so treat the result as a solid estimate rather than a guarantee.
What is a good efficiency number to use in the range calculator?
Typical EV efficiency values vary by vehicle size and conditions. Compact EVs often achieve 5–7 km/kWh in mild weather. Family sedans and SUVs typically land at 4–6 km/kWh. Highway driving at high speed, cold weather, and heavy heating/AC use reduce efficiency. If you don't know your car's figure, start with the official WLTP value from the manufacturer — then reduce by 10–20% for a conservative real-world estimate.
Can I use the kWh calculator for things other than EV charging?
Yes. The kWh to Euro calculator works for any electricity consumption: charging an EV, running a heat pump, calculating appliance costs, or estimating solar panel payback. Enter the energy amount in kWh and your electricity tariff, and it returns the cost in your currency. The tool is not EV-specific — it is a general energy cost calculator.
Why does the range calculator give different results than my car's display?
Your car's range display is dynamic — it adapts in real time to recent driving patterns, HVAC load, speed, and temperature. The calculator uses a fixed efficiency figure you enter, so it represents average conditions. If you want a closer match, use the efficiency value your car currently shows (often in kWh/100 km or miles/kWh on the energy screen) rather than the manufacturer's WLTP figure.