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Calculate charging time, cost & compare charger types.
EV Charging Calculator is a free browser-based tool that helps you calculate charging time, cost & compare charger types. It is part of ToolsMonk's automobile tools collection, so you can finish the job without downloading software, creating an account, or jumping between multiple websites.
This tool is especially useful for workflows such as estimating how long an ev will take to charge at home or a public point, working out the cost to charge from one level to another, and comparing charging costs at different electricity rates or charger speeds. Because it runs directly in your browser, you can use it on desktop, tablet, or mobile while keeping the process fast and easy for one-off tasks as well as repeat work.
EV Charging Calculator is designed for people who want a practical, privacy-friendly workflow with instant results inside the larger ToolsMonk library.
Enter the battery capacity and the charge range you want (e.g. 20% to 80%)
Enter the charger power and your electricity price
See the estimated charging time and cost
Adjust to compare chargers or tariffs
Estimates EV charging time and cost from battery size and charger power
Takes battery capacity (kWh), charge level, charger power (kW), and electricity price
Shows estimated time to charge and the cost to do so
Helps compare home vs public charging and plan trips
Runs in your browser — your figures stay on your device
Free, with no signup
Estimating how long an EV will take to charge at home or a public point
Working out the cost to charge from one level to another
Comparing charging costs at different electricity rates or charger speeds
Planning charging stops on a longer journey
EV Charging Calculator is a powerful free online tool available on ToolsMonk that helps you calculate charging time, cost & compare charger types. Whether you're a professional, student, or casual user, our ev charging calculator provides instant, accurate results right in your browser without requiring any software installation or account creation.
As part of our Automobile Tools collection, this tool is designed with simplicity and power in mind. All processing happens client-side, ensuring your data remains completely private and secure. The tool works seamlessly across all modern browsers on desktop, tablet, and mobile devices.
EV Charging Calculator estimates how long it takes — and how much it costs — to charge an electric vehicle, from the battery capacity, the charge range you want, the charger's power, and your electricity price.
The time estimate is essentially the energy you need divided by the charger's power: adding 40 kWh on a 7 kW charger takes roughly six hours. Reality runs a little longer because of charging losses and because the rate tapers as the battery fills — which is also why fast charging is quoted as 10–80%, since the final stretch slows dramatically to protect the battery.
Cost is the energy added times your price per kWh, plus a small allowance for losses. Here the tariff dominates: home charging, especially off-peak, is typically far cheaper per kWh than public rapid chargers, which carry a convenience premium. Plugging in different prices shows the gap clearly for your case.
For daily use, charging to around 80% is the sweet spot for both speed and long-term battery health. Everything runs in your browser, so your figures stay private. Pair it with the other ToolsMonk automobile tools to model the full running cost of an EV.
Plan around 10–80% charging — it's where charging is fastest and kindest to battery health
Charge at home on an off-peak tariff where possible; it's usually far cheaper than public rapid charging
Add a margin to the estimate for charging losses and the slowdown as the battery fills
Common questions about this tool, its workflow, and what to expect before you use it.
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