Free Online Unit Converters & Calculators

Fast, accurate, and mobile-friendly conversion tools for everyday use, engineering, cooking, fitness, technology, construction, and more.

psi kg to lbs cups to ml fahrenheit mph to kmh meters to feet

Popular Conversions

PSI to kPa kPa to PSI PSI to Bar Bar to PSI Bar to kPa kPa to Bar PSI to MPa MPa to PSI kPa to MPa MPa to kPa Bar to MPa MPa to Bar

Popular Categories

Browse conversion tools by category including engineering, cooking, fitness, construction, temperature, pressure, and more.

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Length

Distance, height, and measurement conversions.

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Mass

Mass, weight, and measurement conversions.

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Volume

Volume, liquid capacity, cooking, and storage conversions.

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Pressure

Pressure, force, hydraulic, and engineering conversions.

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Speed

Speed, velocity, transportation, and motion conversions.

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Power

Power, electricity, energy, and engineering conversions.

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Automotive

Vehicle, automotive, engine, and transportation conversions.

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Technology

Computers, software, storage, and technology conversions.

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Construction & Engineering

Force, load, torque, pressure, area, volume, geotechnical, engineering, civil, structural, and construction conversions.

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Travel

Travel, distance, transportation, and navigation conversions.

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Fitness

Weight, calories, and exercise-related conversions.

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School

School, math, science, and educational conversions.

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Everyday Conversions

Quick everyday converters for common daily measurements, time, cooking, travel, and household use.

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Data Transfer

Bandwidth, internet speed, file transfer, and digital data conversions.

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Cooking

Kitchen measurements, baking conversions, recipe scaling, and liquid volume tools.

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Area

Area, land, room, and surface measurement conversions.

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Time

Time, scheduling, duration, and clock conversions.

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Energy

Energy, electricity, heat, and power conversions.

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Fuel Economy

Fuel economy, mileage, consumption, and vehicle efficiency conversions.

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Torque

Torque, rotational force, automotive, and mechanical conversions.

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Temperature

Temperature, weather, cooking, and scientific conversions.

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Flow Rate

Flow rate and pumping conversions.

Popular Converters

Quickly access commonly used converters for pressure, speed, mass, power, length, and cooking measurements.

PSI to kPa kPa to PSI PSI to Bar Bar to PSI Bar to kPa kPa to Bar PSI to MPa MPa to PSI kPa to MPa MPa to kPa Bar to MPa MPa to Bar kPa to psf psf to kPa kPa to tsf tsf to kPa psf to kN/m² kN/m² to psf tsf to kN/m² kN/m² to tsf psf to tsf tsf to psf kN/m to lb/ft lb/ft to kN/m kg/m to lb/ft lb/ft to kg/m MPa to tsf tsf to MPa kN to N N to kN kN to LBS LBS to kN Kips to LBS LBS to Kips US Tons to Kips Kips to US Tons kN to Kips Kips to kN MPa to ksi ksi to MPa PCF to kN/m³ kN/m³ to PCF kg/m³ to PCF PCF to kg/m³ kN·m to ft-lb ft-lb to kN·m kN·m to kip-ft kip-ft to kN·m ft-lb to in-lb in-lb to ft-lb kN to Metric Tons Metric Tons to kN kN to US Tons US Tons to kN kPa to kN/m² kN/m² to kPa MPH to KMH KMH to MPH Knots to MPH MPH to Knots Knots to KMH KMH to Knots Kilograms to Pounds Pounds to Kilograms Kilograms to Grams Grams to Kilograms Grams to Ounces Ounces to Grams US Tons to KG KG to US Tons Imperial Tons to KG KG to Imperial Tons Metric Tons to KG KG to Metric Tons LBS to Ounces Ounces to LBS Stones to LBS LBS to Stones Watts to Horsepower Horsepower to Watts kW to Watts Watts to kW kWh to Joules Joules to kWh kW to HP HP to kW Amps to Watts Watts to Amps Volts to Watts Watts to Volts Amps to kW kW to Amps Volts to kW kW to Volts kVA to kW kW to kVA Inches to Centimeters Centimeters to Inches Feet to Meters Meters to Feet Yards to Meters Meters to Yards Miles to Kilometers Kilometers to Miles Inches to mm mm to Inches Inches to Feet Feet to Inches Yards to Feet Feet to Yards Centimeters to MM MM to Centimeters Nautical Miles to Kilometers Kilometers to Nautical Miles Celsius to Fahrenheit Fahrenheit to Celsius Milliliters to Ounces Ounces to Milliliters Cups to Milliliters Milliliters to Cups Tablespoons to Milliliters Milliliters to Tablespoons Teaspoons to Milliliters Milliliters to Teaspoons Tablespoons to Teaspoons Teaspoons to Tablespoons Pounds to Grams Grams to Pounds Kilograms to Walking Calories Imperial Gallons to Liters Liters to Imperial Gallons Liters to US Gallons US Gallons to Liters Gallons to ML ML to Gallons Liters to Quarts Quarts to Liters Pints to Cups Cups to Pints Liters to Milliliters Milliliters to Liters Cubic Meters to Cubic Yards Cubic Yards to Cubic Meters Cubic Feet to Cubic Meters Cubic Meters to Cubic Feet Cubic Meters to Liters Liters to Cubic Meters Acres to Hectares Hectares to Acres Square Meters to Square Feet Square Feet to Square Meters Acres to Square Feet Square Feet to Acres Square Miles to Square Kilometers Square Kilometers to Square Miles Hectares to Square Meters Square Meters to Hectares Minutes to Hours Hours to Minutes Days to Hours Hours to Days Weeks to Days Days to Weeks Joules to Calories Calories to Joules KB to MB MB to KB MB to GB GB to MB GB to TB TB to GB Bits to Bytes Bytes to Bits L/100km to MPG MPG to L/100km MPG to KM/L KM/L to MPG MPG to Liters per 100km Liters per 100km to MPG Newton Meters to Foot-Pounds Foot-Pounds to Newton Meters Mbps to MBps MBps to Mbps Bytes to KB KB to Bytes Bytes to MB MB to Bytes TB to PB PB to TB Kelvin to Celsius Celsius to Kelvin Fahrenheit to Kelvin Kelvin to Fahrenheit Liters per Minute to GPM GPM to Liters per Minute m³/hr to L/s L/s to m³/hr CFM to L/s L/s to CFM CFM to m³/hr m³/hr to CFM

Fast Calculations

Instantly convert units with accurate formulas and real-time calculations.

Mobile Friendly

Designed for phones, tablets, laptops, and desktop devices with responsive layouts.

Engineering & Everyday Use

Built for engineering, construction, cooking, fitness, science, travel, and daily conversions.