- Enter Energy Value — Type any positive numeric value into the input field.
- Select Source & Target Units — Choose from 12 energy units: J, kJ, MJ, cal, kcal, Wh, kWh, eV, BTU, ft·lbf, erg, and therm.
- Instant Multi-Unit View — View the primary conversion result alongside a real-time table displaying all 11 other equivalent units simultaneously.
- Copy or Swap — Click 'Copy' to copy the formatted result to your clipboard or 'Swap' to reverse unit directions instantly.
1. Exact Mathematical Definition & The Fundamental Physics of Energy
In classical physics, relativistic dynamics, and thermodynamics, energy is defined rigorously as the quantitative scalar capacity of a physical system to perform mechanical work (\(W\)), transfer heat (\(Q\)), or undergo state transformations against external forces. In Newtonian mechanics, the fundamental relationship between mechanical work and spatial displacement under an acting force vector \(\mathbf{F}\) is formulated by the line integral:
$$W = \int_{C} \mathbf{F} \cdot d\mathbf{s}$$
According to the Work-Energy Theorem, the net work performed on a macroscopic rigid body of invariant mass \(m\) accelerates it from initial velocity \(v_i\) to final velocity \(v_f\), directly increasing its kinetic energy (\(E_k\)):
$$W_{\text{net}} = \Delta E_k = \frac{1}{2} m v_f^2 - \frac{1}{2} m v_i^2$$
Similarly, work performed against a conservative vector field—such as Earth's gravitational field or an electrostatic Coulomb potential—is conserved as potential energy (\(E_p\)):
$$E_p = -\int_{\mathbf{r}_0}^{\mathbf{r}} \mathbf{F}_{\text{conservative}} \cdot d\mathbf{r} = m g h$$
Within the International System of Units (SI), the coherent derived unit of energy and mechanical work is the Joule (\(\text{J}\)), named in honor of the English physicist James Prescott Joule for his experimental demonstration of the mechanical equivalent of heat. Dimensionally categorized in SI base units as \([M][L]^2[T]^{-2}\), one Joule represents the exact work done when an applied force of one Newton displaces an object through a distance of one meter in the direction of the force:
$$1\text{ J} = 1\text{ N}\cdot\text{m} = 1\text{ kg}\cdot\text{m}^2\cdot\text{s}^{-2} = 1\text{ W}\cdot\text{s} = 1\text{ V}\cdot\text{A}\cdot\text{s} = 1\text{ C}\cdot\text{V}$$
In relativistic four-dimensional spacetime, Albert Einstein established the mass-energy equivalence principle, demonstrating that invariant rest mass \(m_0\) itself constitutes a concentrated manifestation of latent energy:
$$E_0 = m_0 c^2$$
where \(c \equiv 299{,}792{,}458\text{ m/s}\) is the universal speed of light in vacuum. Under this equivalence, a single gram of matter encapsulates approximately \(8.987 \times 10^{13}\text{ Joules}\) (\(\approx 25\text{ million kilowatt-hours}\)) of rest energy.
The First Law of Thermodynamics establishes that within any isolated universe or closed system, energy can neither be created nor destroyed; it can only mutate across mechanical, chemical, thermal, electrical, radiant, and nuclear manifestations:
$$dU = \delta Q - \delta W$$
2. Core Conversion Mechanics & Base-Unit Normalization Architecture
Because energy spans phenomena from quantum subatomic interactions (\(10^{-19}\text{ J}\)) to planetary geothermal reserves and electric power utility grids (\(10^{18}\text{ J}\)), disparate technological sectors historically evolved localized units: electrical engineers quantify energy in kilowatt-hours (\(\text{kWh}\)), nutritionists and biochemists measure metabolic intake in kilocalories (\(\text{kcal}\)), heating and ventilation (HVAC) specialists rely on British Thermal Units (\(\text{BTU}\)), natural gas utilities invoice in therms, and particle physicists track collision cross-sections in electronvolts (\(\text{eV}\)).
To eliminate cascading rounding artifacts and floating-point errors inherent in pairwise conversion tables, our engine implements a centralized base-pivot normalization architecture using the coherent SI Joule (\(\text{J}\)) as the universal datum. Given an input quantity \(X\) in source unit \(U_{\text{src}}\) with normalization factor \(F_{\text{src}}\) relative to the Joule, the equivalent value \(Y\) in target unit \(U_{\text{dst}}\) with factor \(F_{\text{dst}}\) is computed deterministically by:
$$Y = \frac{X \times F_{\text{src}}}{F_{\text{dst}}}$$
The twelve supported energy units and their foundational derivations are established as follows:
- Joule (\(\text{J}\)): The SI baseline datum. Multiplicative factor: \(1.0\).
- Kilojoule (\(\text{kJ}\)): Decimal metric multiple (\(10^3\text{ J}\)). International standard for packaged food nutritional labeling (e.g., European Union and Australian mandates). Factor: \(1{,}000\).
- Megajoule (\(\text{MJ}\)): Decimal metric multiple (\(10^6\text{ J}\)). Standard for fuel heating value comparisons, vehicle fuel economy tests, and explosive energy ratings. Factor: \(1{,}000{,}000\).
- Thermochemical Calorie (\(\text{cal}\)): Historically defined as the heat required to raise the temperature of 1 gram of air-free water by \(1^\circ\text{C}\). Standardized internationally by ISO 31-4 and NIST as exactly: \(1\text{ cal} \equiv 4.184\text{ J}\). Factor: \(4.184\).
- Kilocalorie (\(\text{kcal}\)): Equal to \(1{,}000\text{ calories} = 4{,}184\text{ J}\). Known universally in dietary science and public health as the large "food Calorie" (often written with a capital C). Factor: \(4{,}184\).
- Watt-hour (\(\text{Wh}\)): The electrical energy delivered by a constant power of one Watt operating continuously for one hour (\(3{,}600\text{ seconds}\)). \(1\text{ Wh} = 1\text{ W} \times 3{,}600\text{ s} = 3{,}600\text{ J}\). Standard for portable electronics and smartphone battery capacities. Factor: \(3{,}600\).
- Kilowatt-hour (\(\text{kWh}\)): Commercial electricity utility standard, equivalent to \(1{,}000\text{ Wh} = 3.6 \times 10^6\text{ J} = 3.6\text{ MJ}\). Factor: \(3{,}600{,}000\).
- Electronvolt (\(\text{eV}\)): The kinetic energy acquired by an unbound electron accelerating across an electrostatic potential difference of one Volt in vacuum: \(1\text{ eV} = e \times 1\text{ V} = 1.602\,176\,634 \times 10^{-19}\text{ J}\). Standard in solid-state bandgap analysis, nuclear physics, and quantum optics. Factor: \(1.602\,176\,634 \times 10^{-19}\).
- British Thermal Unit (\(\text{BTU}\)): The heat required to raise the temperature of one avoirdupois pound of liquid water by \(1^\circ\text{F}\) at standard atmospheric pressure. The ISO/International Table standard fixes \(1\text{ BTU}_{\text{IT}} \approx 1{,}055.056\text{ J}\) (computationally indexed as \(1{,}055.06\text{ J}\)). Factor: \(1{,}055.06\).
- Foot-pound force (\(\text{ft}\cdot\text{lbf}\)): Mechanical work done when a force of one pound-force acts through a displacement of one foot. Derived as \(0.45359237\text{ kg} \times 9.80665\text{ m/s}^2 \times 0.3048\text{ m} \approx 1.3558179\text{ J}\) (computationally \(1.35582\text{ J}\)). Factor: \(1.35582\).
- Erg (\(\text{erg}\)): The coherent unit of work and energy in the CGS metric system: \(1\text{ erg} = 1\text{ dyne}\cdot\text{cm} = 10^{-5}\text{ N} \times 10^{-2}\text{ m} = 10^{-7}\text{ J}\). Retained in astrophysics and galactic magnetic field thermodynamics. Factor: \(10^{-7}\).
- Therm (\(\text{therm}\)): Commercial bulk energy unit for natural gas utility metering. Legally defined in the United States as exactly \(100{,}000\text{ BTU} \approx 1.055 \times 10^8\text{ J} = 105.5\text{ MJ} \approx 29.3\text{ kWh}\). Factor: \(1.055 \times 10^8\).
3. Comparative Analysis Matrix: Energy Units Across Global Metrology
The comparative matrix below documents the twelve international energy units supported by our real-time engine, detailing their standard abbreviations, originating measurement frameworks, exact multiplicative scale factors to the SI Joule, reciprocal conversion multipliers, and primary technical sectors.
| Unit Designation | Standard Symbol | Measurement System | Multiplicative Factor (Joules per Unit) | Reciprocal Factor (Units per Joule) | Primary Industrial & Scientific Domain |
|---|---|---|---|---|---|
| Joule | J |
International System of Units (SI Derived) | 1.000000 | 1.000000 | Fundamental physics, thermodynamics, mechanical engineering, scientific research |
| Kilojoule | kJ |
SI Metric Multiple (10³) | 1,000.000 | 0.001000 | Global food nutritional labeling, chemical reaction enthalpies, human physiology |
| Megajoule | MJ |
SI Metric Multiple (10⁶) | 1,000,000.0 | 1.000 × 10⁻⁶ | Vehicle fuel economy, propellant combustion, industrial energy audits, ballistic kinetic energy |
| Thermochemical Calorie | cal |
Metric Thermal Unit | 4.184000 | 0.239006 | Analytical chemistry, aqueous thermochemistry, calorimetry experiments |
| Kilocalorie (Food Calorie) | kcal or Cal |
Nutritional / Dietary Metric | 4,184.000 | 2.39006 × 10⁻⁴ | Dietetics, sports science, clinical nutrition, metabolic rate profiling (BMR/TDEE) |
| Watt-hour | Wh |
Electrical Energy Standard | 3,600.000 | 2.77778 × 10⁻⁴ | Rechargeable lithium battery ratings, smartphone power packs, drone flight packs |
| Kilowatt-hour | kWh |
Commercial Electricity Standard | 3,600,000.0 | 2.77778 × 10⁻⁷ | Electric utility grid metering, electric vehicle (EV) battery packs, solar generation arrays |
| Electronvolt | eV |
Quantum / Fundamental Constant | 1.60218 × 10⁻¹⁹ | 6.24151 × 10¹⁸ | Semiconductor bandgaps, atomic spectroscopy, nuclear decay, particle accelerator physics |
| British Thermal Unit | BTU |
Imperial / US Customary Thermal | 1,055.060 | 9.47817 × 10⁻⁴ | HVAC air conditioning capacity, furnace thermal ratings, residential heating loads |
| Foot-pound force | ft·lbf |
Imperial Mechanical Engineering | 1.355820 | 0.737562 | Mechanical torque work, ballistic muzzle energy, civil structural impact loading |
| Erg | erg |
CGS System (Centimeter-Gram-Second) | 1.000 × 10⁻⁷ | 10,000,000.0 | Theoretical astrophysics, stellar radiation pressure, cosmic ray energy spectra |
| Therm | therm |
US/UK Natural Gas Utility | 1.055 × 10⁸ | 9.47817 × 10⁻⁹ | Residential and industrial natural gas billing, pipeline custody transfer, bulk heating |
4. Physical Energy Scales & Real-World Phenomena Matrix
To contextualize physical magnitudes from subatomic quantum interactions to planetary industrial infrastructure, the matrix below compiles benchmark energy quantities across distinct physical scales.
| Physical Phenomenon / Technical System | Energy Regime | Magnitude in Joules (J) | Conventional Engineering Unit | Thermodynamic Significance & Real-World Context |
|---|---|---|---|---|
| Single Photon of Visible Green Light (\(\lambda = 550\text{ nm}\)) | Sub-femtojoule (Quantum) | 3.61 × 10⁻¹⁹ J | 2.25 eV | Sufficient energy to trigger retinal rhodopsin isomerization in human vision |
| Silicon Semiconductor Bandgap Energy (\(300\text{ K}\)) | Atomic / Solid State | 1.79 × 10⁻¹⁹ J | 1.12 eV | Threshold photon energy required to generate an electron-hole pair in silicon solar cells |
| Hydrolysis of Single ATP Molecule in Living Cells | Biochemical Cellular | 5.0 × 10⁻²⁰ to 8.0 × 10⁻²⁰ J | 0.31 to 0.50 eV (\(\approx 30.5\text{ kJ/mol}\)) | Universal chemical fuel powering muscle contraction, ion pumps, and protein synthesis |
| Kinetic Energy of a Flying Mosquito (\(2.5\text{ mg at }1\text{ m/s}\)) | Microjoule regime | 1.25 × 10⁻⁶ J | 12.5 ergs | Classic introductory physics benchmark for mechanical kinetic energy |
| Complete Combustion of One Wooden Matchstick | Joule regime | 1,000 to 1,500 J | 1.0 to 1.5 kJ (\(\approx 0.24\text{ to }0.36\text{ kcal}\)) | Thermal energy liberated by combustion of cellulose, sulfur, and potassium chlorate |
| Smartphone Battery Full Charge (iPhone / Galaxy \(\approx 4{,}000\text{ mAh at }3.85\text{V}\)) | Kilojoule / Watt-hour | 55,440 J | 15.4 Wh (\(0.0154\text{ kWh}\)) | Powers modern smartphone for approximately 24 hours of standard usage |
| Baseball Fastball Kinetic Energy (\(145\text{ g at }100\text{ mph / }44.7\text{ m/s}\)) | Mechanical kinetic | 145 J | 106.9 ft·lbf | Impact energy absorbed by catcher's mitt during high-velocity Major League pitch |
| Daily Human Nutritional Intake (Standard Adult Maintenance) | Megajoule / Kilocalorie | 8.37 × 10⁶ J | 2,000 kcal (\(8{,}368\text{ kJ}\) or \(2.32\text{ kWh}\)) | Chemical energy required for basal metabolic rate (BMR) and daily physical activity |
| Combustion of One US Gallon of Standard Automotive Gasoline | Megajoule bulk fuel | 1.20 × 10⁸ J | 120 MJ (\(33.3\text{ kWh}\) or \(113{,}700\text{ BTU}\)) | High chemical energy density explaining the historical dominance of hydrocarbon fuels |
| Residential Monthly Electrical Consumption (US Average) | Gigajoule utility | 3.24 × 10⁹ J | 900 kWh (\(3{,}240\text{ MJ}\) or \(30.7\text{ therms}\)) | Standard monthly residential billing quantity for lighting, HVAC, and appliances |
| Electric Vehicle Full Battery Charge (Tesla Model Y Long Range) | Megajoule automotive | 2.70 × 10⁸ J | 75 kWh (\(270\text{ MJ}\) or \(256{,}000\text{ BTU}\)) | Provides approximately 310 miles (500 km) of highway driving range at 85% motor efficiency |
| One Ton of TNT Explosive Energy Standard | Gigajoule military metric | 4.184 × 10⁹ J | 4.184 GJ (\(1{,}000\text{ kWh}\) or \(10^9\text{ thermochemical calories}\)) | International treaty benchmark for quantifying conventional ordnance and nuclear yields |
| Full Fuel Load of Boeing 777-300ER (181,280 Liters of Jet A-1) | Terajoule aviation | 6.34 × 10¹² J | 6.34 TJ (\(1.76\text{ million kWh}\) or \(60{,}000\text{ therms}\)) | Chemical potential energy enabling non-stop transoceanic flight exceeding 14,000 km |
5. Practical Real-World Transformation Scenarios & Worked Examples
Scenario A: Commercial Energy Audit & Industrial kWh to MJ Conversion
An industrial energy auditor is evaluating an aluminum casting manufacturing facility that consumed \(450{,}000\text{ kWh}\) of electricity and \(12{,}500\text{ therms}\) of natural gas over a quarterly production cycle. Corporate ESG decarbonization reporting requires all energy figures aggregated into Gigajoules (GJ):
- Convert Electricity from kWh to Joules: $$E_{\text{elec}} = 450{,}000\text{ kWh} \times 3{,}600{,}000\text{ J/kWh} = 1.62 \times 10^{12}\text{ J} = 1{,}620\text{ GJ}$$
- Convert Natural Gas from Therms to Joules: $$E_{\text{gas}} = 12{,}500\text{ therms} \times 1.055 \times 10^8\text{ J/therm} = 1.318\,75 \times 10^{12}\text{ J} \approx 1{,}318.75\text{ GJ}$$
- Aggregate Total Primary Energy Consumption: $$E_{\text{total}} = 1{,}620\text{ GJ} + 1{,}318.75\text{ GJ} = 2{,}938.75\text{ GJ}$$
- Audit Conclusion: Converting both disparate billing units into the unified SI metric reveals that natural gas accounts for \(44.88\%\) of facility primary energy intake, highlighting prime targets for heat recovery systems.
Scenario B: Nutritional Food Labeling & International Compliance (kcal to kJ)
A food processing company in the United States exports a packaged protein snack bar to the European Union and Australia. The US nutrition label certifies \(260\text{ Calories}\) (kilocalories). European Regulation (EU) No 1169/2011 mandates displaying energy content in both kilojoules (\(\text{kJ}\)) and kilocalories (\(\text{kcal}\)):
- Identify Source Value & Factor: \(260\text{ kcal}\) where \(1\text{ kcal} \equiv 4.184\text{ kJ}\).
- Perform Multiplication: $$E_{\text{kJ}} = 260 \times 4.184 = 1{,}087.84\text{ kJ}$$
- Compliance Rounding: According to EU labeling guidelines, values over \(100\text{ kJ}\) are rounded to the nearest integer, resulting in \(1{,}088\text{ kJ}\) (declared as: Energy: 1088 kJ / 260 kcal).
Scenario C: HVAC Heat Pump Sizing & BTU/hr to Electrical Power
An HVAC mechanical engineer is retrofitting a residential heating system currently served by an aged oil furnace outputting \(72{,}000\text{ BTU/hr}\). The homeowner plans to install a modern variable-speed inverter air-source heat pump possessing a seasonal Coefficient of Performance (\(\text{COP}\)) of \(3.2\). The engineer needs to determine the equivalent continuous electrical power input in kilowatts (\(\text{kW}\)):
- Convert Thermal Energy to Joules per Hour: $$72{,}000\text{ BTU} \times 1{,}055.06\text{ J/BTU} = 75{,}964{,}320\text{ J/hr}$$
- Calculate Thermal Power in Watts (\(\text{J/s}\)): $$P_{\text{thermal}} = \frac{75{,}964{,}320\text{ J}}{3{,}600\text{ seconds}} \approx 21{,}101.2\text{ W} \approx 21.10\text{ kW}_{\text{thermal}}$$
- Apply Heat Pump COP to Calculate Electrical Input Power: $$P_{\text{electrical}} = \frac{P_{\text{thermal}}}{\text{COP}} = \frac{21.10\text{ kW}}{3.2} \approx 6.59\text{ kW}_{\text{electrical}}$$
- Engineering Decision: The home electrical panel must support a continuous \(6.6\text{ kW}\) electrical load, requiring a dedicated \(40\text{A}\) circuit breaker at \(240\text{V}\).
6. Power vs. Energy, Conservation Laws & Exergy
A persistent source of engineering confusion is the conceptual conflation of Power and Energy. Power is a dynamic, instantaneous rate of energy transit, whereas energy is the cumulative accumulated quantity of work accomplished over time:
$$P(t) = \frac{dE}{dt} \iff E = \int_{t_1}^{t_2} P(t) \, dt$$
A high-power device operating for a microsecond may transfer minuscule total energy (e.g., a camera strobe flash dissipating \(100{,}000\text{ W}\) for \(1\text{ ms}\) discharges merely \(100\text{ Joules}\)), whereas a tiny power device running perpetually accumulates massive energy (e.g., a \(10\text{ W}\) LED bulb left illuminated for an entire year consumes \(10\text{ W} \times 8{,}760\text{ h} = 87.6\text{ kWh} = 315.36\text{ Megajoules}\)).
Furthermore, while total energy is strictly conserved by the First Law of Thermodynamics, the Second Law of Thermodynamics introduces the concept of exergy—the maximum theoretically useful work extractable from a system as it reaches thermodynamic equilibrium with its environment. In every real irreversibility, entropy increases (\(\Delta S_{\text{universe}} > 0\)), degrading high-grade mechanical or electrical work into diffuse, low-temperature thermal dissipation. For any thermal heat engine operating between hot reservoir \(T_H\) and cold sink \(T_C\), maximum possible thermal-to-mechanical conversion efficiency is bounded by the Carnot limit:
$$\eta_{\text{max}} = 1 - \frac{T_C}{T_H}$$
7. Laboratory & Industrial Calorimetry Metrology
Measuring energy content across chemical, biological, and nuclear domains relies on precision calorimetric instrumentation:
- Constant-Volume Oxygen Bomb Calorimetry (ASTM D240 / ISO 1928): Solid or liquid fuel samples are sealed inside a heavy-walled stainless steel vessel pressurized with pure oxygen (\(25\text{--}30\text{ atm}\)) and submerged in a water bath. Electrical ignition incinerates the sample, and precision thermistors measure the micro-kelvin water temperature rise to establish the gross calorific value (Higher Heating Value, HHV).
- Differential Scanning Calorimetry (DSC): Measures the difference in heat flow required to maintain sample and inert reference pans at identical ramped temperatures. Crucial in polymer science and materials engineering to pinpoint glass transition temperatures (\(T_g\)), crystallization enthalpies, and melting endotherms.
- Digital Revenue Energy Meters (ANSI C12.20 / IEC 62053): Smart utility meters sample instantaneous voltage and current waveforms at kilohertz frequencies using analog-to-digital converters (ADCs), computing active energy (\(\text{kWh}\)), reactive energy (\(\text{kVARh}\)), and apparent energy (\(\text{kVAh}\)) with Class 0.2 metrological accuracy.
- Optical Laser Calorimeters & Pyroelectric Sensors: Detect pulse energy in pulsed industrial lasers (from microjoules in ophthalmic surgery to tens of joules in metal cutting) via calibrated surface absorption and thermoelectric voltage generation.
8. Common Pitfalls, Unit Confusion & Metrological Traps
Preventing measurement and financial errors during energy conversions requires vigilance regarding historical unit nuances:
- The "calorie" vs "Calorie" / "kcal" Trap: In colloquial speech, people say "a 500-calorie burger." In physical reality, nutritionists denote kilocalories (\(500\text{ kcal} = 500{,}000\text{ calories} = 2{,}092{,}000\text{ Joules}\)). Mixing up small calories (\(\text{cal}\)) with food Calories (\(\text{Cal}\) or \(\text{kcal}\)) introduces an immediate 1,000-fold order-of-magnitude error.
- Confusing Kilowatts (\(\text{kW}\)) with Kilowatt-hours (\(\text{kWh}\)): You cannot "consume 5 kilowatts per hour." Kilowatts represent instantaneous power capacity; kilowatt-hours quantify energy consumed. A \(100\text{ kW}\) solar farm operating for \(4\text{ peak sun hours}\) generates \(400\text{ kWh}\) of electrical energy.
- Higher Heating Value (HHV) vs Lower Heating Value (LHV): In combustion fuels, HHV (Gross Calorific Value) includes the latent heat of vaporization of water produced during combustion, while LHV (Net Calorific Value) assumes water remains vapor. In natural gas, HHV is approximately \(10\%\) higher than LHV. Quoting efficiency without stating the basis distorts boiler and turbine comparisons.
- US Therm vs UK / Historical Therm: A US therm is legally \(100{,}000\text{ BTU}_{\text{IT}} \approx 105.4804\text{ MJ}\), whereas older European definitions utilized slightly differing reference temperatures. Always verify the precise legal definition in commercial utility contracts.
9. Privacy-First, Zero-Server Client-Side Architectural Paradigm
The Serverless Tools Energy Converter is developed under a strict privacy-first architecture, ensuring that your confidential calculations remain secure:
- Zero Network Communication: Every calculation, unit scale transformation, and intermediate arithmetic operation occurs entirely within your local browser's JavaScript sandbox. No figures or engineering specs are transmitted across the web.
- No Third-Party Cookies or Telemetry: We do not track user input values, session durations, or calculation histories. Your sensitive commercial energy audits and proprietary manufacturing numbers remain completely private.
- Full Offline Capability: Once loaded, the tool functions flawlessly without an internet connection, making it suitable for remote power plants, offshore platforms, secure test labs, or underground utility tunnels.
- Sub-Millisecond Reactive Performance: Local execution guarantees instant, latency-free updates across all eleven alternative unit equivalents as you type.
10. Recommended Complementary Physical & Electrical Engineering Utilities
Comprehensive thermodynamic analysis and electrical design require cross-dimensional physical conversions. Explore our suite of complementary precision tools:
- Power Converter — Convert instantaneous work rates across watts, kilowatts, megawatts, metric horsepower (PS), mechanical horsepower (hp), and dBm.
- Electric Current Converter — Convert electric charge transit rates between amperes, milliamperes, microamperes, kiloamperes, and CGS abamperes.
- Voltage Converter — Convert electric potential differences across volts, millivolts, microvolts, kilovolts, and statvolts.
- Frequency Converter — Convert cyclic rates and periodic oscillations between hertz, kilohertz, megahertz, gigahertz, and radians per second.