Unit Conversion Formulas

Length Conversions

• 1 meter (m) = 100 centimeters (cm)
• 1 meter (m) = 1000 millimeters (mm)
• 1 kilometer (km) = 1000 meters (m)
• 1 inch (in) = 2.54 centimeters (cm)
• 1 foot (ft) = 12 inches (in) = 0.3048 meters (m)
• 1 yard (yd) = 3 feet (ft) = 0.9144 meters (m)
• 1 mile (mi) = 5280 feet (ft) = 1.60934 kilometers (km)

Weight/Mass Conversions

• 1 kilogram (kg) = 1000 grams (g)
• 1 gram (g) = 1000 milligrams (mg)
• 1 pound (lb) = 16 ounces (oz) = 0.453592 kilograms (kg)
• 1 ounce (oz) = 28.3495 grams (g)
• 1 stone (st) = 14 pounds (lb) = 6.35029 kilograms (kg)
• 1 ton (US) = 2000 pounds (lb) = 907.185 kilograms (kg)
• 1 tonne (metric ton) = 1000 kilograms (kg)

Volume Conversions

• 1 liter (L) = 1000 milliliters (mL)
• 1 cubic meter (m³) = 1000 liters (L)
• 1 gallon (US) = 3.78541 liters (L)
• 1 gallon (UK) = 4.54609 liters (L)
• 1 quart (US) = 0.946353 liters (L)
• 1 pint (US) = 0.473176 liters (L)
• 1 cup (US) = 0.236588 liters (L)
• 1 fluid ounce (US) = 29.5735 milliliters (mL)
• 1 tablespoon (US) = 14.7868 milliliters (mL)
• 1 teaspoon (US) = 4.92892 milliliters (mL)

Temperature Conversions

• Celsius to Fahrenheit: °F = (°C × 9/5) + 32
• Fahrenheit to Celsius: °C = (°F - 32) × 5/9
• Celsius to Kelvin: K = °C + 273.15
• Kelvin to Celsius: °C = K - 273.15
• Fahrenheit to Kelvin: K = (°F - 32) × 5/9 + 273.15
• Kelvin to Fahrenheit: °F = (K - 273.15) × 9/5 + 32

Area Conversions

• 1 square meter (m²) = 10.7639 square feet (ft²)
• 1 square kilometer (km²) = 0.386102 square miles (mi²)
• 1 square foot (ft²) = 0.092903 square meters (m²)
• 1 square inch (in²) = 6.4516 square centimeters (cm²)
• 1 acre = 43,560 square feet (ft²) = 4046.86 square meters (m²)
• 1 hectare = 10,000 square meters (m²) = 2.47105 acres

Time Conversions

• 1 minute = 60 seconds
• 1 hour = 60 minutes = 3600 seconds
• 1 day = 24 hours = 1440 minutes = 86,400 seconds
• 1 week = 7 days = 168 hours = 10,080 minutes = 604,800 seconds
• 1 month (average) = 30.44 days = 730.5 hours = 43,830 minutes = 2,629,800 seconds
• 1 year = 365.25 days = 8,766 hours = 525,960 minutes = 31,557,600 seconds

Speed Conversions

• 1 meter per second (m/s) = 3.6 kilometers per hour (km/h)
• 1 kilometer per hour (km/h) = 0.277778 meters per second (m/s)
• 1 mile per hour (mph) = 1.60934 kilometers per hour (km/h)
• 1 mile per hour (mph) = 0.44704 meters per second (m/s)
• 1 knot = 1.852 kilometers per hour (km/h) = 0.514444 meters per second (m/s)

Pressure Conversions

• 1 pascal (Pa) = 0.000145038 pounds per square inch (psi)
• 1 kilopascal (kPa) = 0.145038 pounds per square inch (psi)
• 1 bar = 100,000 pascals (Pa) = 14.5038 pounds per square inch (psi)
• 1 atmosphere (atm) = 101,325 pascals (Pa) = 14.6959 pounds per square inch (psi)
• 1 pound per square inch (psi) = 6894.76 pascals (Pa)
• 1 millimeter of mercury (mmHg) = 133.322 pascals (Pa)

Energy Conversions

• 1 joule (J) = 0.000239006 kilocalories (kcal)
• 1 kilojoule (kJ) = 0.239006 kilocalories (kcal)
• 1 kilocalorie (kcal) = 4.184 kilojoules (kJ)
• 1 watt-hour (Wh) = 3.6 kilojoules (kJ)
• 1 kilowatt-hour (kWh) = 3600 kilojoules (kJ) = 860.421 kilocalories (kcal)
• 1 British thermal unit (BTU) = 1.05506 kilojoules (kJ)
• 1 electronvolt (eV) = 1.602176634 × 10^-19 joules (J)

Digital Storage Conversions

• 1 byte (B) = 8 bits (b)
• 1 kilobyte (KB) = 1024 bytes (B)
• 1 megabyte (MB) = 1024 kilobytes (KB) = 1,048,576 bytes (B)
• 1 gigabyte (GB) = 1024 megabytes (MB) = 1,073,741,824 bytes (B)
• 1 terabyte (TB) = 1024 gigabytes (GB) = 1,099,511,627,776 bytes (B)
• 1 petabyte (PB) = 1024 terabytes (TB) = 1,125,899,906,842,624 bytes (B)