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ConverterKey

A modern converter toolkit built for speed, precision, and mobile use.

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  • Length Converter
  • CM to Inches Converter
  • Feet to Meters Converter
  • Miles to Kilometers Converter
  • Area Converter

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Browse all converters and tools in one place.

Search for a converter, open a popular tool, or browse by category to get where you need quickly.

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TimerStopwatchLive ClockJPG to PNGPDF to JPGCurrencyTemperatureLengthWord Counter

Popular tools

Start with the converters people use most often.

Internet Speed Test

Measure ping, download speed, and upload speed from your browser.

JPG to PNG Converter

Convert JPG or JPEG images to PNG directly in your browser.

JPG to PDF Converter

Convert JPG or JPEG images to PDF directly in your browser.

PDF to JPG Converter

Convert PDF pages to JPG images directly in your browser.

Currency Converter

Convert currencies with live reference exchange rates.

How Much House Can I Afford? Calculator

Estimate home affordability from income, debts, down payment, rates, taxes, and budget.

Word Counter

Count words, characters, sentences, paragraphs, and reading time.

Length Converter

Convert meters, feet, inches, miles, and more length units.

CM to Inches Converter

Convert centimeters and inches instantly.

Weight Converter

Convert metric, imperial, troy, and astronomical mass units instantly.

KG to LBS Converter

Convert kilograms and pounds instantly.

Density Converter

Convert density units instantly for science, engineering, materials, and fluid calculations.

Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin instantly.

Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius and Kelvin quickly.

Volume Converter

Convert liters, gallons, cubic meters, cups, and fluid ounces.

Pressure Converter

Convert pascal, bar, psi, atm, torr, and kilopascal.

MB to GB Converter

Convert megabytes and gigabytes in decimal format.

Browse by category

Browse converter categories by task, file type, or unit type.

Length

Distance and length measurements for metric and imperial units.

Browse length conversions

Area

Convert surfaces like square meters, acres, and square feet.

Browse area conversions

Volume

Convert liquid and cubic volume measurements quickly.

Browse volume conversions

Weight

Mass and weight converters for metric and imperial systems.

Browse weight conversions

Density

Convert density units for science, engineering, materials, and fluids.

Browse density conversions

Temperature

Switch between Celsius, Fahrenheit, and Kelvin.

Browse temperature conversions

Speed

Convert travel and motion units like mph, kph, and knots.

Browse speed conversions

Time

Convert seconds, minutes, hours, days, and weeks.

Browse time conversions

Data

Digital storage converter for bits, bytes, and binary units.

Browse data conversions

Pressure

Pressure conversions for engineering, weather, and HVAC.

Browse pressure conversions

Energy

Convert joules, calories, kilowatt-hours, and BTU.

Browse energy conversions

Power

Convert watts, horsepower, and larger power units.

Browse power conversions

Frequency

Frequency units from Hz to GHz and rotational speed.

Browse frequency conversions

Angle

Convert between degrees, radians, arcminutes, and arcseconds.

Browse angle conversions

Force

Convert force units including newton, kilonewton, and lbf.

Browse force conversions

Fuel Economy

Fuel efficiency conversions for mpg, km/l, and L/100 km.

Browse fuel economy conversions

Internet Tools

Check connection speed, latency, and upload performance.

Open speed test

File Tools

Convert images, PDFs, and HTML files.

Browse file tools

Image Tools

Convert and export common image formats in the browser.

Browse image tools

Text Tools

Count, clean, and format text for everyday tasks.

Browse text tools

Finance Tools

Convert currencies for planning, pricing, and comparison.

Browse finance tools

All tools

Browse the full ConverterKey catalog in one place.

Internet Tools

Internet Speed Test

Measure ping, download speed, and upload speed from your browser.

Image Tools

JPG to PNG Converter

Convert JPG or JPEG images to PNG directly in your browser.

Image Tools

PNG to JPG Converter

Convert PNG images to JPG directly in your browser.

Image Tools

WebP to PNG Converter

Convert WebP images to PNG directly in your browser.

Image Tools

WebP to JPG Converter

Convert WebP images to JPG directly in your browser.

Image Tools

SVG to PNG Converter

Convert SVG files to PNG directly in your browser.

File Tools

JPG to PDF Converter

Convert JPG or JPEG images to PDF directly in your browser.

File Tools

HTML to PDF Converter

Convert an uploaded HTML file to PDF directly in your browser.

File Tools

PNG to PDF Converter

Convert PNG images to PDF directly in your browser.

File Tools

Image to PDF Converter

Convert JPG, PNG, or WebP images to PDF directly in your browser.

File Tools

PDF to JPG Converter

Convert PDF pages to JPG images directly in your browser.

File Tools

PDF to PNG Converter

Convert PDF pages to PNG images directly in your browser.

File Tools

HTML to JPG Converter

Convert an uploaded HTML file to a JPG image directly in your browser.

Text Tools

Word Counter

Count words, characters, sentences, paragraphs, and reading time.

Text Tools

Case Converter

Convert text to uppercase, lowercase, sentence case, and title case.

Text Tools

HTML to Text Converter

Convert HTML markup to plain text directly in your browser.

Text Tools

CSV to JSON Converter

Convert CSV text to formatted JSON directly in your browser.

Text Tools

JSON to CSV Converter

Convert JSON objects to CSV directly in your browser.

Time Tools

Live Clock

Watch the current time live and switch between time zones.

Time Tools

Online Timer

Run preset or custom countdown timers with pause, reset, and a completion chime.

Time Tools

Online Stopwatch

Measure elapsed time with start, pause, reset, and lap tracking.

Finance Tools

Currency Converter

Convert currencies with live reference exchange rates.

Finance Tools

How Much House Can I Afford? Calculator

Estimate home affordability from income, debts, down payment, rates, taxes, and budget.

Length

Length Converter

Convert meters, feet, inches, miles, and more length units.

Length

CM to Inches Converter

Convert centimeters and inches instantly.

Length

Feet to Meters Converter

Convert feet and meters with one click.

Length

Miles to Kilometers Converter

Convert miles and kilometers for trips and routes.

Area

Area Converter

Convert area units such as square meters, acres, and square feet.

Area

Square Meters to Square Feet Converter

Convert m² and ft² for floor plans and property listings.

Area

Acres to Square Feet Converter

Convert acres to square feet and back.

Volume

Volume Converter

Convert liters, gallons, cubic meters, cups, and fluid ounces.

Volume

Volume - Dry Converter

Convert dry volume units for grains, produce, and historical measures.

Volume

Liters to Gallons Converter

Convert liters and US gallons quickly.

Volume

Cups to ML Converter

Convert US cups and milliliters for cooking.

Weight

Weight Converter

Convert metric, imperial, troy, and astronomical mass units instantly.

Weight

KG to LBS Converter

Convert kilograms and pounds instantly.

Weight

Ounces to Grams Converter

Convert ounces and grams for recipes and packaging.

Density

Density Converter

Convert density units instantly for science, engineering, materials, and fluid calculations.

Temperature

Temperature Converter

Convert Celsius, Fahrenheit, and Kelvin instantly.

Temperature

Fahrenheit to Celsius Converter

Convert Fahrenheit to Celsius and Kelvin quickly.

Temperature

Celsius to Kelvin Converter

Convert Celsius to Kelvin and Fahrenheit for science calculations.

Speed

Speed Converter

Convert kph, mph, m/s, knots, and feet per second.

Speed

MPH to M/S Converter

Convert miles per hour and meters per second.

Time

Time Converter

Convert milliseconds, seconds, minutes, hours, days, and weeks.

Time

Minutes to Hours Converter

Convert minutes and hours quickly.

Time

Days to Hours Converter

Convert days and hours with one click.

Data

Data Storage Converter

Convert bytes, decimal storage units, bits, media capacities, and legacy disk sizes.

Data

MB to GB Converter

Convert megabytes and gigabytes in decimal format.

Data

GB to MB Converter

Convert gigabytes and megabytes in decimal format.

Pressure

Pressure Converter

Convert pascal, bar, psi, atm, torr, and kilopascal.

Pressure

Bar to PSI Converter

Convert bar and psi pressure values instantly.

Pressure

KPA to PSI Converter

Convert kilopascal and psi quickly.

Energy

Energy Converter

Convert joules, calories, watt-hours, and BTU values.

Energy

KJ to KCAL Converter

Convert kilojoules and kilocalories for nutrition labels.

Power

Power Converter

Convert watts, kilowatts, megawatts, and horsepower.

Power

Watts to Horsepower Converter

Convert watts and mechanical horsepower.

Frequency

Frequency Converter

Convert Hz, kHz, MHz, GHz, and RPM in one place.

Frequency

HZ to RPM Converter

Convert hertz and revolutions per minute.

Angle

Angle Converter

Convert degrees, radians, grads, arcminutes, and arcseconds.

Angle

Radians to Degrees Converter

Convert radians and degrees for trigonometry.

Force

Force Converter

Convert newtons, kilonewtons, pound-force, and dynes.

Fuel Economy

Fuel Economy Converter

Convert mpg, km/L, and L/100 km with reciprocal formulas handled.

Fuel Economy

L/100km to MPG Converter

Convert liters per 100 km to US/UK mpg and km/L.