Free Online Unit Converter for Everyday Measurements
Convert length, weight, temperature, volume, area, speed, pressure, energy, time, currency, and math values in seconds. Use the quick converter for common units, or open a dedicated converter page for formulas, tables, examples, and practical context.
Explore by Category
Time
Convert seconds, minutes, hours, dates, periods, and frequency-related time values.
ExploreLength
Convert metric, imperial, nautical, and screen-related length units.
ExploreWeight
Convert mass and weight values for everyday, shipping, fitness, and technical use.
ExploreVolume
Convert liquid, cooking, capacity, and container volume units.
ExploreTemperature
Convert Celsius, Fahrenheit, Kelvin, Rankine, and common temperature references.
ExploreCurrency
Convert major currencies for quick estimates, travel planning, and reference calculations.
ExploreArea
Convert land, room, map, and property area units.
ExplorePressure
Convert bar, kPa, atm, psi, pascal, and other pressure units.
ExploreSpeed
Convert km/h, mph, m/s, knots, Mach, and other speed units.
ExploreEnergy
Convert joules, calories, kWh, BTU, and related energy values.
ExplorePower
Convert watts, kilowatts, horsepower, and other power units.
ExploreFrequency
Convert Hz, MHz, period, RPM, and wave-related frequency values.
ExploreMathematics
Convert decimals, fractions, percentages, roots, and everyday number formats.
ExplorePopular Converters
Start with the conversions people use most often. Each dedicated converter includes the calculator, formula, quick values, and helpful examples when available.
Time
Length
Weight
Volume
Temperature
Area
Currency
Energy
Frequency
Mathematics
Power
Pressure
Speed
Why use ConvertX?
Fast, free, and no sign-up required
Use ConvertX without creating an account or going through extra steps. Enter a value, choose your units, and get the result right away — whether you need one quick answer or several conversions in a row.
Built for real everyday tasks
ConvertX covers common conversions for homework, recipes, travel, shopping, fitness, construction, finance estimates, technical notes, and quick measurement checks. Our converters are easy to bookmark, revisit, and share.
Reliable results based on standard formulas
ConvertX uses established conversion formulas for measurement units such as length, weight, temperature, area, speed, pressure, energy, power, and frequency. Results are calculated instantly and displayed clearly, with rounding kept readable for everyday use.
Clear explanations, not just numbers
Our converters include formulas, step-by-step examples, quick reference tables, and practical context. You can copy the answer quickly, or understand how the conversion works when accuracy matters.
How It Works
Enter & Select
Enter a value and choose the units you want to convert from and to.
Click Convert
Our engine instantly processes your request with high accuracy.
Get Results
View accurate results immediately and use them with confidence.
New Converters
- Sq Yd to ft² | Square Yards to Square Feet
- √1 to √100 Examples | Square Root Chart
- Square Mile to Acre | mi² → acres Chart
- m² to yd² | Square Meters to Square Yards
- Square Meter to Square Mile | m² to mi²
- ft² to mi² | Square Feet to Square Miles
- km² to mi² | Square Kilometers to Sq Miles
- Convert sq ft to sq yds | ft² → sq yd
- Convert s to Hz | Seconds to Hertz
- Convert RPM to RPS (rev/min → rev/sec)
- RPM to MPH by Tire Size | rev/min to mph
- Convert RPM to Angular Velocity (rev/min)
- Rankine to Kelvin Converter | °R → K
- °R to °F | Rankine to Fahrenheit Converter
- rev/min to rad/s | Convert RPM to rad/sec
- Convert rad to rev | Radians → Revolutions
- Convert rad/s to RPM (rad/sec → rev/min)
- QT to kg by Density | Quarts to Kilograms
- PT to oz Converter | Pints to Ounces
- Convert pt to ml | Pints → mL Converter