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COMMON UNIT EQUIVALENTS
Length,Mass & Time
Force,Energy, Work & Power
Pressure & Temperature
Electricity & Magnetism
Waves
Length,Mass & Time
Force,Energy, Work & Power
4. Force
| Quantity | Unit | Conversion |
|---|---|---|
| 1 newton (N) | = 1 kg·m/s² | |
| 1 meganewton (MN) | = 1 × 10⁶ newtons (N) | |
| 1 micronewton (μN) | = 1 × 10⁻⁶ newtons (N) |
5. Energy / Work / Heat
| Quantity | Unit | Conversion |
|---|---|---|
| 1 joule (J) | = 1 N·m | |
| 1 kilojoule (kJ) | = 1000 joules (J) | |
| 1 megajoule (MJ) | = 1 × 10⁶ joules (J) | |
| 1 microjoule (μJ) | = 1 × 10⁻⁶ joules (J) | |
| 1 calorie (cal) | = 4.184 joules (J) | |
| 1 electronvolt (eV) | = 1.6 × 10⁻¹⁹ joules (J) |
6. Power
| Quantity | Unit | Conversion |
|---|---|---|
| 1 watt (W) | = 1 joule/second (J/s) | |
| 1 kilowatt (kW) | = 1000 watts (W) | |
| 1 megawatt (MW) | = 1 × 10⁶ watts (W) | |
| 1 microwatt (μW) | = 1 × 10⁻⁶ watts (W) | |
| 1 horsepower (hp) | ≈ 746 watts (W) |
Pressure & Temperature
7. Pressure
| Quantity | Unit | Conversion |
|---|---|---|
| 1 pascal (Pa) | = 1 N/m² | |
| 1 kilopascal (kPa) | = 1000 pascals (Pa) | |
| 1 megapascal (MPa) | = 1 × 10⁶ pascals (Pa) | |
| 1 micropascal (μPa) | = 1 × 10⁻⁶ pascals (Pa) | |
| 1 atmosphere (atm) | ≈ 101,325 pascals (Pa) | |
| 1 bar | = 100,000 pascals (Pa) |
8. Temperature
| Conversion | Formula |
|---|---|
| Celsius to Kelvin | K = °C + 273.15 |
| Kelvin to Celsius | °C = K – 273.15 |
Electricity & Magnetism
9. Charge / Current
| Quantity | Unit | Conversion |
|---|---|---|
| 1 coulomb (C) | = 1 ampere·second (A·s) | |
| 1 microcoulomb (μC) | = 1 × 10⁻⁶ coulombs (C) | |
| 1 millicoulomb (mC) | = 1 × 10⁻³ coulombs (C) | |
| 1 megacoulomb (MC) | = 1 × 10⁶ coulombs (C) | |
| 1 ampere (A) | = base unit | |
| 1 milliampere (mA) | = 1 × 10⁻³ amperes (A) | |
| 1 microampere (μA) | = 1 × 10⁻⁶ amperes (A) | |
| 1 megaampere (MA) | = 1 × 10⁶ amperes (A) |
10. Voltage / Potential Difference
| Quantity | Unit | Conversion |
|---|---|---|
| 1 volt (V) | = 1 joule/coulomb (J/C) | |
| 1 millivolt (mV) | = 1 × 10⁻³ volts (V) | |
| 1 microvolt (μV) | = 1 × 10⁻⁶ volts (V) | |
| 1 kilovolt (kV) | = 1000 volts (V) | |
| 1 megavolt (MV) | = 1 × 10⁶ volts (V) |
11. Resistance
| Quantity | Unit | Conversion |
|---|---|---|
| 1 ohm (Ω) | = 1 V/A | |
| 1 kiloohm (kΩ) | = 1000 ohms (Ω) | |
| 1 megaohm (MΩ) | = 1 × 10⁶ ohms (Ω) | |
| 1 microohm (μΩ) | = 1 × 10⁻⁶ ohms (Ω) |
Waves
12. Frequency / Wavelength
| Quantity | Unit | Conversion |
|---|---|---|
| 1 hertz (Hz) | = 1 cycle/second | |
| 1 kilohertz (kHz) | = 1000 hertz (Hz) | |
| 1 megahertz (MHz) | = 1 × 10⁶ hertz (Hz) | |
| 1 gigahertz (GHz) | = 1 × 10⁹ hertz (Hz) | |
| 1 microhertz (μHz) | = 1 × 10⁻⁶ hertz (Hz) |
13. Density
| Quantity | Unit | Conversion |
|---|---|---|
| Density (ρ) | = mass/volume | |
| kg/m³ to g/cm³ | 1 kg/m³ = 0.001 g/cm³ | |
| Megagrams per cubic meter (Mg/m³) | = 1 × 10³ kg/m³ | |
| Micrograms per cubic centimeter (μg/cm³) | = 1 × 10⁻⁶ g/cm³ |
14. Speed / Velocity
| Quantity | Unit | Conversion |
|---|---|---|
| 1 m/s | = 3.6 km/h | |
| 1 km/h | ≈ 0.2778 m/s | |
| 1 micrometer per second (μm/s) | = 1 × 10⁻⁶ m/s | |
| 1 megameter per second (Mm/s) | = 1 × 10⁶ m/s |