I know battery size, current %, target %, and charger kW
Use the EV Charging Time Calculator to estimate how long a session may take.
Estimate charging timeCharging Calculators
Use these calculators for everyday EV charging and battery charging estimates. Enter your own battery size, charger power, electricity price, and efficiency values.
Last reviewed: 2026-07-17
Which calculator should I use?
Start with the values you already have. The calculators do not need a vehicle database or account login; they work best when you copy numbers from your vehicle screen, charger app, utility bill, charging receipt, product label, or owner manual.
I know kWh added and price per kWh
Use the EV Charging Cost Calculator to estimate wall energy and session cost.
Estimate charging costI want to compare home and public charging
Use the Home vs Public Charging Cost Calculator to compare repeated sessions.
Compare charging costsI know voltage and amps from a charger label
Use the Charger Power Calculator to translate label values into approximate kW.
Calculate charger powerI know available kWh and recent driving efficiency
Use the kWh to EV Range Calculator to estimate miles or kilometers with a reserve.
Estimate EV rangeI have a power bank or portable power station
Use the Battery Charging Time Calculator for Wh, Ah, mAh, and charger output ratings.
Estimate battery charging timeEV Charging Time Calculator - 20% to 80%
Estimate EV charge time from battery kWh, current %, target %, charger kW, and efficiency, with charger examples, formula notes, and taper warnings.
EV Charging Cost Calculator - Cost per Mile, km & Month
Calculate EV charging cost from kWh added, electricity price, efficiency, fees, monthly miles or km, cost per mile, cost per km, cost per 100 km, and annual charging.
EV Charging Cost at Home vs Charging Station
Compare the cost of charging an EV at home vs charging station prices using your own rates, efficiency, session fees, monthly miles, and home charging share.
kWh to EV Range Calculator - Trip Buffer, km & Reserve
Estimate EV range from available kWh, battery capacity, current charge, efficiency, reserve, weather buffer, and planned trip distance in miles or km.
EV Charger Power Calculator - Volts, Amps & kW
Calculate EV charger power in watts and kilowatts from volts, amps, phase, and power factor, then use the kW result in a charging time estimate.
Battery Charging Time Calculator
Estimate charging time for general batteries, power banks, portable power stations, and small devices from Wh, Ah, or mAh.