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Calcimator

Battery C-Rate Calculator

Calculate charge and discharge time from battery C-rate.

Inputs

Ah
V
C
C

Results

Discharge Current

50 A

Discharge Time

2 hrs

Discharge Power2,400 W
Charge Current30 A
Charge Time3.33 hrs
Total Energy4,800 Wh
Charge Power1,440
How to Use This Calculator
  1. Enter Battery Capacity, Nominal Voltage, and Discharge C-Rate.
  2. Set Charge C-Rate.
  3. Review Discharge Current (A) and Discharge Time (hrs).
  4. Use Discharge Power (W) and Charge Current (A) to inform your decision.

How the result changes with Battery Capacity

Battery CapacityDischarge CurrentDischarge Time
1,001500.5 A2 hrs
3,5011,750.5 A2 hrs
6,5003,250 A2 hrs
9,0004,500 A2 hrs

What each input means

Battery Capacity
Battery capacity in amp-hours.
Nominal Voltage
Nominal battery pack voltage.
Discharge C-Rate
Discharge C-rate (1C = discharge in 1 hour).
Charge C-Rate
Charge C-rate (0.5C = charge in 2 hours).

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Battery Capacity = 100, Nominal Voltage = 48, Discharge C-Rate = 0.5, Charge C-Rate = 0.3 = 4 input(s) provided
  2. Calculate Discharge Current
    Discharge Current
    50 = 50
  3. Calculate Discharge Time
    Discharge Time
    2 = 2
  4. Calculate Discharge Power
    Discharge Power
    2400 = 2400
  5. Calculate Charge Current
    30 = 30

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