Convert units across physics, chemistry, engineering, medicine & more. Features grouped interface, smart search, real-time conversion for scientific precision.
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Unit conversion is the process of changing a measurement from one unit to another while maintaining the same quantity. This is essential in science, engineering, cooking, and everyday life when working with different measurement systems or comparing values across different scales.
Most common type where units are related by a simple multiplication factor (e.g., 1 meter = 100 centimeters).
More complex conversions like temperature (Celsius to Fahrenheit) that require specific formulas.
Meters, feet, inches, miles, kilometers, and more
Kilograms, pounds, ounces, grams, and more
Celsius, Fahrenheit, Kelvin
Liters, gallons, cups, tablespoons, and more
Square meters, acres, square feet, hectares
Miles per hour, kilometers per hour, knots
Seconds, minutes, hours, days, years
Bytes, kilobytes, megabytes, gigabytes
Pascals, PSI, atmospheres, bar
Joules, calories, kilowatt-hours, BTU
Watts, kilowatts, horsepower, BTU/hour
Degrees, radians, gradians, arcminutes
Hertz, kilohertz, megahertz, RPM
PPI, DPI, pixels per centimeter
Cups, tablespoons, grams, ounces
kg/m³, g/cm³, lb/ft³, slugs/ft³
Newton meters, foot pounds, inch pounds
Lux, foot candles, phot, lambert
Tesla, gauss, microtesla, oersted
Bits per second, bytes per second, Mbps
USD, EUR, GBP, JPY, and 10+ more
Amperes, milliamperes, kiloamperes
Volts, millivolts, kilovolts, megavolts
Ohms, kiloohms, megaohms
m³/s, L/s, GPM, CFM
Moles/L, mg/L, ppm, ppb
Sieverts, becquerels, gray, rad
Points, picas, inches, pixels
A4, A3, Letter, Legal, Tabloid
AWG, SWG, mm², circular mils
Pa·s, cP, poise, stokes
W/m·K, BTU/h·ft·°F, cal/s·cm·°C
Decibels, pascals, bars
Metric, UNC/UNF, British Standard
Blood pressure, glucose, temperature
Light years, parsecs, AU, km
Molarity, molality, ppm, normality
pH, pOH, pKa, pKb, hydrogen ion concentration
Micromoles, nanomoles, IU/L, katal
Farads, henrys, microfarads, millihenrys
IU, RAE, DFE, vitamin measurements
RGB, HSL, dB, bit rates, color spaces
Decibels, bels, nepers, octaves
Solar masses, luminosities, magnitudes
All conversion factors are based on internationally recognized standards and precise mathematical formulas.
Covering 66 categories with 611 units, from everyday measurements to specialized scientific units.
Instant conversions as you type, with no need to refresh or wait for results.
Track your conversion history and export results for future reference.
Precise measurements for experiments, calculations, and technical specifications using metric and imperial units.
Convert between different measurement systems for recipes, from cups and tablespoons to grams and ounces.
Convert distances, speeds, and temperatures when traveling between countries with different measurement systems.
Convert data storage units, transfer rates, and digital resolution for computer and device specifications.
Choose the type of units you want to convert: length, weight, temperature, volume, area, speed, time, or data.
Select the unit you're converting FROM (the unit of your current measurement).
Select the unit you're converting TO (the unit you need the result in).
Input the numerical value you want to convert.
See the converted value with high precision and additional unit equivalents.
Conversions between metric units or within the same system are mathematically exact with no approximation.
These conversions use internationally accepted conversion factors and are highly accurate for practical purposes.
Temperature conversions use exact formulas: °F = (°C × 9/5) + 32, K = °C + 273.15, etc.
Results may be displayed in scientific notation (e.g., 1.23e+6) for very large or very small values.
Convert between 36 categories and 300+ units with precise, standards‑based factors. Live conversion, favorites, and export features.
Professional unit converter with intelligent grouping, smart search, and real-time conversion. Convert between scientific, engineering, medical, and practical units with enterprise-grade precision.
66 categories and 611 units covering physics, chemistry, engineering, medicine, astronomy, digital media, and more.
Grouped interface reduces 90% of choices with 10 logical groups and advanced search filtering.
NIST-standard accuracy with logarithmic scales, complex conversions, and domain-specific units.
Professional-grade calculators for scientific and engineering workflows.
Important: This unit converter is designed for educational, engineering, and general conversion purposes using internationally recognized conversion factors and standardized measurement relationships. While calculations are mathematically accurate and based on official conversion standards, minor variations may exist for historical, specialized, or regional units. For scientific research, engineering applications, medical dosing, legal documentation, or commercial transactions, always verify conversions with authoritative sources and consult qualified professionals. The calculator handles standard SI units, imperial measurements, and common international units but may not account for specific industry standards, historical variations, or specialized measurement contexts that could affect precision requirements.
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