Length,Mass & Time
1. Length
Quantity | Unit | Conversion |
---|
1 kilometer (km) | = 1000 meters (m) | |
1 meter (m) | = 100 centimeters (cm) | |
1 centimeter (cm) | = 10 millimeters (mm) | |
1 millimeter (mm) | = 1 × 10⁻³ meters (m) | |
1 micrometer (μm) | = 1 × 10⁻⁶ meters (m) | |
1 nanometer (nm) | = 1 × 10⁻⁹ meters (m) | |
1 megameter (Mm) | = 1 × 10⁶ meters (m) | |
2. Mass
Quantity | Unit | Conversion |
---|
1 tonne (t) | = 1000 kilograms (kg) | |
1 kilogram (kg) | = 1000 grams (g) | |
1 gram (g) | = 1000 milligrams (mg) | |
1 milligram (mg) | = 1 × 10⁻³ grams (g) | |
1 microgram (μg) | = 1 × 10⁻⁶ grams (g) | |
1 megagram (Mg) | = 1 × 10⁶ grams (g) = 1 tonne (t) | |
3. Time
Quantity | Unit | Conversion |
---|
1 hour (h) | = 60 minutes (min) | |
1 minute (min) | = 60 seconds (s) | |
1 second (s) | = base unit | |
1 millisecond (ms) | = 1 × 10⁻³ seconds (s) | |
1 microsecond (μs) | = 1 × 10⁻⁶ seconds (s) | |
1 nanosecond (ns) | = 1 × 10⁻⁹ seconds (s) | |
1 megasecond (Ms) | = 1 × 10⁶ seconds (s) | |
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 | |