EV Charging Time, Added Range & Speed Calculator
Calculate electric vehicle charging duration (hours & minutes), added driving range (miles / km), charging speed (mph), and charging session electricity cost across Level 1, Level 2, and DC Fast Chargers with battery taper modeling.
Vehicle Battery & Charger Specs
Usable capacity (e.g. 77 kWh Model Y / Ioniq 5)
Typical: 3.2–4.0 mi/kWh (286 Wh/mi)
80% recommended for battery longevity & DC speed
Home avg: $0.16/kWh; DC Fast: $0.35–$0.55/kWh
Estimated Charging Duration
Level 2 AC Charging
4 hrs 27 mins
Adding 46.2 kWh net energy (20% → 80% SoC)
Added Driving Range
+161.7 Miles
+260.2 km added range
Charging Speed (Range Rate)
36.3 mph (58.4 km/h)
At 10.35 kW effective into battery
Session Economics & Efficiency Breakdown
Total Electricity Consumed (Grid):
51.3 kWh (90% AC efficiency)
Total Charging Session Cost:
$8.21 ($0.051 / mile)
Battery Taper Profile:
Steady rate (Level 2 AC is untapered)
Frequently Asked Questions
Why does charging from 80% to 100% take as long as 10% to 80% on DC fast chargers?
As battery cells reach maximum cell voltage (~4.2V), the charger transitions from Constant Current (CC) to Constant Voltage (CV). Power drops from 150+ kW down to 10–25 kW to protect cell internal chemistry.
Does my car charge faster if I plug into a 350 kW charger instead of a 150 kW charger?
Only if your EV features an 800-volt architecture (such as the Hyundai Ioniq 5, Porsche Taycan, or Kia EV6). Most 400-volt vehicles (such as Chevy Bolt or older Teslas) cap at 150–250 kW regardless of charger size.