Unit Converters Online Free
Every unit, converted instantly
Free unit converters: length, weight, temperature, area, volume, speed, data storage, time, energy, pressure, angle and frequency — all instant and in your browser.
12 free tools · 100% browser-based · no sign-up
Length Converter
Value and units
Meters, feet, miles, kilometers — convert any length unit instantly
Open toolWeight Converter
Value and units
Kilograms, pounds, ounces, grams — convert weight and mass units
Open toolTemperature Converter
Value and units
Celsius, Fahrenheit, Kelvin — convert temperatures exactly
Open toolArea Converter
Value and units
Square meters, acres, hectares, square feet — convert area units
Open toolVolume Converter
Value and units
Liters, gallons, cups, milliliters — convert volume and capacity
Open toolSpeed Converter
Value and units
km/h, mph, knots, m/s — convert speed units instantly
Open toolData Storage Converter
Value and units
Bytes, KB, MB, GB, TB — convert file sizes and storage units
Open toolTime Converter
Value and units
Seconds, minutes, hours, days — convert time units instantly
Open toolEnergy Converter
Value and units
Joules, calories, kWh, BTU — convert energy units exactly
Open toolPressure Converter
Value and units
PSI, bar, atm, kPa — convert pressure units instantly
Open toolAngle Converter
Value and units
Degrees, radians, gradians — convert angle units instantly
Open toolFrequency Converter
Value and units
Hz, kHz, MHz, GHz — convert frequency units instantly
Open toolWhy use unit converters at Super Utility Hub?
Every unit converters on Super Utility Hub runs 100% in your browser. Nothing is uploaded, nothing is stored, and nothing is installed — the results are generated instantly on your own device. There is no account to create, no file size limit, and no watermark on your output.
All tools are free forever, work on desktop and mobile, and are updated continuously. If a tool isn't listed yet, it's likely on the roadmap — check back soon.
Frequently asked questions
Are the converters tools really free?
Yes. Every converters tool is free with no limits, no trials, and no premium paywall. The site is supported entirely by advertising.
Do I need to create an account?
No account, no email, and no sign-up is required. Open a tool, use it, and you're done — that's it.
Is my data sent to a server?
No. All tools run locally in your browser. Your files and input never leave your device.
Do the tools work on mobile?
Yes. Every tool is responsive and works in any modern browser on Android and iOS.