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Coulomb to Ampere-second (C to A·s) Charge Converter

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Live Conversion • ISO 80000-6:2022 Certified
1 Coulomb = 1 Ampere-second
1 C = 1 A·s • 1 A·s = 1 C
Coulomb to Ampere-second: One Coulomb is equal to 1 Ampere-second.
Certified Authority Value
1.00000000
A·s
Exact: 1 A·s ≡ 1 C
C
C
Swap to Ampere-second to Coulomb
Swap to Ampere-second to Coulomb
A·s
A·s 1
Quick Values:
Conversion Formula
To convert Coulomb to Ampere-second, multiply by 1
C × 1 = A·s

Calculation: 1 C × 1 = 1 A·s

Common Coulomb to Ampere-second Calculations

Quick-lookup reference table showing calculated equivalents for standard increments between Coulomb (C) and Ampere-second (A·s).

Tap any row to calculate
Coulomb to Ampere-second: Primary Direct Table (15 Steps)
Coulomb to Ampere-second Conversion Reference Table
Conversion & Equivalent Value Scientific Notation
0.001 C 0.001 A·s 1 × 10⁻³
0.01 C 0.01 A·s 1 × 10⁻²
0.1 C 0.1 A·s 1 × 10⁻¹
0.5 C 0.5 A·s 5 × 10⁻¹
1 C 1 A·s 1 × 10⁰
2 C 2 A·s 2 × 10⁰
5 C 5 A·s 5 × 10⁰
10 C 10 A·s 1 × 10¹
20 C 20 A·s 2 × 10¹
25 C 25 A·s 2.5 × 10¹
50 C 50 A·s 5 × 10¹
100 C 100 A·s 1 × 10²
250 C 250 A·s 2.5 × 10²
500 C 500 A·s 5 × 10²
1000 C 1000 A·s 1 × 10³
Ampere-second to Coulomb: Reciprocal Summary
Ampere-second to Coulomb Conversion Reference Table
Reciprocal & Equivalent Value Scientific Notation
1 A·s 1 C 1 × 10⁰
5 A·s 5 C 5 × 10⁰
10 A·s 10 C 1 × 10¹
50 A·s 50 C 5 × 10¹
100 A·s 100 C 1 × 10²
View Complete 15-Row Ampere-second to Coulomb Table

Real-World Context & Everyday Benchmarks

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To help contextualize these units in everyday life, science, and engineering, here are verified real-world reference points for Coulomb (C) and Ampere-second (A·s):

Coulomb References:

  • Typical electrostatic spark charge from touching metal doorknob 5.0E-6 C
  • Average cloud-to-ground lightning stroke electrical charge transfer 15 C
  • Electric charge passing through 100W bulb in one hour of operation 3000 C

Ampere-second References:

  • Electric charge passing through circuit at one ampere in one second (1 C) 1 A·s

Tap any benchmark above to automatically calculate its exact equivalent in Ampere-second.

ISQ Dimension: [I T] Coherent SI Unit: coulomb (C) Electromagnetism, Circuits & Field Theory

How to Convert Coulomb to Ampere-second

Converting Coulomb (C) to Ampere-second (A·s) is a core calculation in Electric Charge, which quantifies the fundamental electrostatic physical property of matter that causes it to experience electromagnetic forces. Both units share an identical 1:1 scale equivalence within this physical measurement domain. They represent the exact same physical magnitude under different metrological designations or derived SI formulations (1 C ≡ 1 A·s). Any quantity expressed in Coulomb translates directly to Ampere-second without mathematical scaling.

Direct Factor1 C = 1 A·s
Inverse Ratio1 A·s = 1 C
Conversion Scale1:1 Direct Dimensional Identity
First-Principles SI Derivation ProofNIST SP 811 / ISO 80000 Compliance

Mathematical Conversion Derivation via Coherent SI Base Unit

Under the International System of Quantities (ISQ), dimensional conversion between non-SI units is rigorously resolved by bridging through the coherent SI base unit (coulomb (C)) without arbitrary rounding:

Vtarget=Vsource×(ksource→SIktarget→SI)V_{\text{target}} = V_{\text{source}} \times \left( \frac{k_{\text{source} \to \text{SI}}}{k_{\text{target} \to \text{SI}}} \right)
Universal Dimensional Conversion Law (ISO 80000 / NIST SP 811)
1. Source SI Bridge (ksource):1 C = 1 coulomb (C)
2. Target SI Bridge (ktarget):1 A·s = 1 coulomb (C)
Step-by-step substitution for Coulomb → Ampere-second:V(A·s) = V(C) × ( 1 / 1 ) = V(C) × 1
Mathematical FormulaValue in Ampere-second = Value in Coulomb × 1Direct computational formula applied for standard conversion.
Worked Example

For an engineering input of 15 C, applying the conversion factor yields exactly 15 A·s. At larger operational scale, 1000 Coulomb corresponds to 1000 A·s.

Inverse check: 1 A·s = 1 C.

Understanding Coulomb and Ampere-second

Coulomb

C
SI Base Standard

A Coulomb (C) is the official base standard unit for electric charge.

Applications & Practical Context

In practical charge terms, a typical electrostatic spark charge from touching metal doorknob equals 5 × 10⁻⁶ C, a average cloud-to-ground lightning stroke electrical charge transfer equals 15 C, a electric charge passing through 100W bulb in one hour of operation equals 3000 C.

Physical Setup

An electric charge of 1 C represents the net electrostatic charge transported by a steady current of 1 ampere flowing for 1 second.

Conversion to SI Unit: coulomb (C)
1 C = 1 C (Base Standard)

Ampere-second

A·s
Standard Unit

An Ampere-second (A·s) is a recognized unit for electric charge.

Applications & Practical Context

In practical charge terms, a electric charge passing through circuit at one ampere in one second (1 C) equals 1 A·s.

Physical Setup

An electric charge of 1 A·s represents the net electrostatic charge transported by a steady current of 1 ampere flowing for 1 second.

Conversion to SI Unit: coulomb (C)
1 A·s = 1 C

Domain Metrology & Engineering Applications

Governing Law & Equation

Conservation of Electric Charge (Q = ∫ I dt)

Measurement Instrumentation

Rigorously quantified in laboratory and field settings using Faraday cup charge collectors, electronic coulombmeters, and precision charge-integrating electrometers.

Primary Industry Sectors

Applied across electrostatic discharge (ESD) semiconductor auditing, xerographic printing, particle accelerator beam measurement, and industrial electrostatic powder coating under international metrology standard ISO 80000-6:2022, CODATA 2022.

Physical Orders of Magnitude & Laboratory Reference Benchmarks

Physical Phenomenon / Engineering ReferenceReference ValueConverted to Ampere-second
Typical electrostatic spark charge from touching metal doorknob5 × 10⁻⁶ C5 × 10⁻⁶ A·s
Average cloud-to-ground lightning stroke electrical charge transfer15 C15 A·s
Electric charge passing through 100W bulb in one hour of operation3000 C3000 A·s
Institutional Metrology & Standard Authority:

Formulas, conversion coefficients, and base definitions on this page strictly adhere to the ISO 80000-6:2022, CODATA 2022 and the BIPM SI Brochure (9th Edition). Governed by Conservation of Electric Charge (Q = ∫ I dt) under ISO 80000 dimensional vector [I T].

Multi-Variable Engineering Bridge Coulomb Transfer & Current Discharge

Electric Charge to Discharge Current Bridge (Amperes • Milliamperes • Microamperes • Kiloamperes)

Calculate continuous electric current I = Q / t from accumulated charge across discharge durations, bridging electric charge [I T] and current [I] via elapsed time (t).

I = Q / t
Vector: [C] ÷ [s] → [A]
Live Calculated Bridge Equivalent:
1 C at Standard 1-Hour Battery C-Rate (3,600 s) = 0.0002778 A
Equals 0.2778 mA • 2.7778 × 10⁻⁷ kA • 277.78 μA
SI Current
0.0002778
A
Amperes
Electronics Scale
0.2778
mA
Milliamperes
Industrial Arc / Fault
2.7778 × 10⁻⁷
kA
Kiloamperes
Low-Power Sleep
277.78
μA
Microamperes
Semiconductor Leakage
2.78 × 10⁸
pA
Picoamperes
EMU Standard
2.7778 × 10⁻⁵
Bi
Biot (Abampere)
  1. 1. Normalize Input to SI Base Unit (C):
    Q = 1 C × 1 = 1 C
  2. 2. Apply Engineering Parameter (t):
    Selected condition: Standard 1-Hour Battery C-Rate (3,600 s) at t = 3600 s
  3. 3. Execute Governing Physical Law in SI Units:
    I = Q / t = (1 C) ÷ (3600 s) = 0.00027778 A
  4. 4. Convert to Standard Engineering Units:
    • A: 0.00027778 × 1 = 0.0002778 A (Amperes) • mA: 0.00027778 × 1000 = 0.2778 mA (Milliamperes) • kA: 0.00027778 × 0.001 = 2.7778 × 10⁻⁷ kA (Kiloamperes) • μA: 0.00027778 × 1000000 = 277.78 μA (Microamperes) • pA: 0.00027778 × 1 × 10¹² = 2.78 × 10⁸ pA (Picoamperes) • Bi: 0.00027778 × 0.1 = 2.7778 × 10⁻⁵ Bi (Biot (Abampere))
Explore Electric Current Converter →
Engineering Substance / Operating Standard Parameter Value (s) Reference State / Condition Typical Industrial & Engineering Application
Lightning Return Stroke (30 μs) 3 × 10⁻⁵ 30 microseconds Atmospheric electrostatic cloud-to-ground discharge
Electrostatic Discharge Pulse (100 ns) 1 × 10⁻⁷ 100 nanoseconds IEC 61000-4-2 human body model ESD pulse
Fast Battery Charge (60 s) 60 60 seconds (1 min) High-rate supercapacitor discharge window
Standard 1-Hour Battery C-Rate (3,600 s) 3600 3,600 seconds (1 hr) Nominal 1C battery cell discharge cycle
Slow Deep Discharge (36,000 s) 36000 36,000 s (10 hrs) Solar energy storage 10-hour reserve rate (0.1C)
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Frequently Asked Questions

The mathematical formula to convert coulombs to ampere-seconds is: [value] * 1 = ampere-seconds. Rather than doing the math manually, you can use our high-precision online calculator to process this exact equation instantly without rounding errors.

To perform the reverse calculation from ampere-seconds back to coulombs, you must divide your starting value by 1. Our bidirectional tool automatically computes this inverse equation the moment you type into the ampere-second input field.

1 Coulomb and 1 Ampere-second represent the exact same physical magnitude with an identical 1:1 conversion ratio.

A typical typical electrostatic spark charge from touching metal doorknob measures 5 × 10⁻⁶ C, which corresponds to 5 × 10⁻⁶ Ampere Second (Ampere-second).

There is exactly 1 A·s in 1 Coulomb (1 C = 1 A·s).

The conversion factor is 1: V(A·s) = V(C) × 1.

The reverse factor is 1: V(C) = V(A·s) × 1.

Under SI definition (ISO 80000), a Coulomb is defined directly as the electric charge transported by a constant current of one Ampere in one second (q = I · t).