The Farads to Amp Hours Calculator helps users convert electrical capacitance values into battery-style capacity ratings. This conversion is useful for engineers, electricians, and DIY enthusiasts who work with supercapacitors and need to compare their energy storage capacity with that of traditional batteries. By entering the capacitance in farads and voltage in volts, the tool quickly provides the equivalent in ampere-hours (Ah), making energy planning and storage design more intuitive.
This tool belongs to the Electrical and Energy Storage Calculators category and is widely applied in energy storage systems, capacitor bank sizing, and supercapacitor battery comparison.
formula of Farads To Amp Hours Calculator
Amp-Hours (Ah) = (C × V) / 3600
Where:
Ah = ampere-hours (electric charge capacity)
C = capacitance in farads (F)
V = voltage across the capacitor (in volts)
3600 = seconds in one hour (to convert coulombs to amp-hours)
Supporting Explanation:
Charge stored in a capacitor is Q = C × V (in coulombs).
Since 1 Ah = 3600 coulombs, we get:
Ah = (C × V) / 3600
This formula is useful when assessing the usefulness of capacitors in place of batteries or to understand how much charge a capacitor can hold over time.
Reference Table for Common Capacitance and Voltage Combinations
| Capacitance (F) | Voltage (V) | Stored Charge (C) | Equivalent Capacity (Ah) |
|---|---|---|---|
| 1 F | 5 V | 5 C | 0.00139 Ah |
| 10 F | 12 V | 120 C | 0.03333 Ah |
| 100 F | 2.7 V | 270 C | 0.075 Ah |
| 500 F | 2.5 V | 1250 C | 0.347 Ah |
| 3000 F | 2.7 V | 8100 C | 2.25 Ah |
This table helps users estimate amp-hour capacity for commonly used supercapacitor sizes and voltages without manual calculations.
Example of Farads To Amp Hours Calculator
Suppose you have a capacitor rated at 1500 F and 2.5 V. You want to know its equivalent in amp-hours.
Step 1: Use the formula
Ah = (C × V) / 3600
Ah = (1500 × 2.5) / 3600 = 3750 / 3600 = 1.0416 Ah
So, a 1500 F capacitor at 2.5 V stores approximately 1.04 amp-hours of energy.
Most Common FAQs
People convert farads to amp-hours to compare supercapacitors with batteries. It helps to estimate how long a capacitor can supply current similar to a battery.
Yes, this calculator is especially useful in low-voltage systems where supercapacitors are used as power backups or energy buffers.
Absolutely. Since charge is the product of capacitance and voltage, a higher voltage significantly increases the calculated amp-hours.