Unit & Number Converters
Accurate, instantaneous conversions for metric, imperial, engineering, binary, hexadecimal, and everyday physical units.
Available Converters
Number System
Convert between binary, hex, octal & decimal.
Length Converter
Convert mm, cm, m, km, inch, foot, mile.
Weight Converter
Convert mg, g, kg, ton, pound, ounce.
Temperature
Convert Celsius, Fahrenheit & Kelvin.
Area Converter
Convert sq m, sq ft, acre, hectare & more.
Volume Converter
Convert liter, ml, gallon, cup & more.
Speed Converter
Convert km/h, mph, m/s & knots.
Epoch Converter
Convert Unix timestamp to human date & back.
Roman Numerals
Convert numbers to Roman numerals & back.
File Size Converter
Convert bytes, KB, MB, GB, TB & more.
Pressure Converter
Convert Bar, PSI, kPa, MPa, atm & Torr.
Power Converter
Convert Watts, kW, Horsepower & BTU/hr.
Energy Converter
Convert Joules, kJ, Calories, kcal & kWh.
Angle Converter
Convert degrees, radians, grad & arcmin.
Data Transfer Rate
Convert Mbps, MB/s, Gbps & download times.
Time Converter
Convert ms, seconds, hours, days & years.
Cooking Converter
Convert cups, grams, tbsp, tsp & ml.
Torque Converter
Convert N·m, ft-lb, in-lb & kgf·m.
Fraction to Decimal
Convert fractions to decimals & back.
Scientific Notation
Convert standard numbers to e-notation.
Fuel Economy
Convert MPG to L/100km, km/L & UK MPG.
Frequency Converter
Convert Hz, kHz, MHz, GHz & RPM.
Force Converter
Convert Newtons, kN, lbf, kgf & Dynes.
Density Converter
Convert kg/m³, g/cm³, lb/ft³ & lb/gal.
Precision calculations for engineers, students & everyday tasks
Whether you are converting engineering units for a technical project, translating cooking measurements in the kitchen, calculating fuel economy for a road trip, or converting binary to hexadecimal for software debugging, Convert369 provides instant, high-precision calculations. Every converter computes results as you type with zero page reloads and standard conversion formulas.
Instant Two-Way Conversion with Live Updates
Type a number into any field and watch both metric and imperial units calculate simultaneously in real time. Switch directions with the one-click Swap button or click any popular preset to jump straight to standard reference values.
Comprehensive Engineering & Scientific Coverage
Beyond basic length and weight, our suite includes advanced converters for Pressure (Bar, PSI, kPa), Power (Watts, Horsepower, BTU), Energy (Joules, Calories, kWh), Torque (N·m, ft-lb), Scientific Notation, Density, and Data Transfer Rates.
Computer Science & Base Conversion Utilities
Convert effortlessly between Binary, Decimal, Hexadecimal, and Octal with formatted bit grouping and ASCII representations, or calculate Unix epoch timestamps to human-readable dates across international time zones.