What is a Unit Converter?

A unit converter is a free online tool that converts measurements between different units. Convert length, weight, temperature, volume, area, speed, time, and more. Supports metric, imperial, and other unit systems with precise calculations.

Is this Unit Converter free to use?

Yes, completely free with no signup or registration required. Convert unlimited measurements across all unit categories. Works offline after loading - all calculations happen in your browser.

What unit categories are supported?

We support 15+ categories: Length (meters, feet, miles), Weight/Mass (kg, pounds, ounces), Temperature (Celsius, Fahrenheit, Kelvin), Volume (liters, gallons, cups), Area (sq meters, acres), Speed, Time, Data Storage, Pressure, Energy, and more.

How accurate are the conversions?

Conversions use precise mathematical formulas with up to 15 decimal places of precision. Common conversions like 1 inch = 2.54 cm or 1 kg = 2.20462 lbs are exactly accurate. Temperature conversions use standard formulas (F = C x 9/5 + 32).

How do I convert Celsius to Fahrenheit?

Select Temperature category, enter the value in Celsius, and the Fahrenheit equivalent shows instantly. Formula: deg F = (deg C x 9/5) + 32. Example: 20 deg C = 68 deg F. Our tool does the math for you with perfect accuracy.

What's the difference between metric and imperial units?

Metric (SI) uses meters, kilograms, liters - based on powers of 10. Imperial uses feet, pounds, gallons - common in US/UK. Our converter handles both systems and converts between them instantly.

Can I convert between different systems?

Yes! Convert metric to imperial and vice versa. Examples: kilometers to miles, kilograms to pounds, liters to gallons, Celsius to Fahrenheit. All cross-system conversions are supported.

Does the Unit Converter work offline?

Yes! Once the page loads, all calculations happen in your browser with no internet required. Bookmark it for offline access. Your conversion history stays private on your device.

Unit Converter

Free online unit converters for length, weight, temperature, digital storage, and more. All calculations happen in your browser - fast, private, and no signup required.

Choose a Converter

Angle Converter

Convert angle measurements like degrees, radians, gradians, and more.

'"circle°+12 more

Area Converter

Convert area measurements like square meters, square feet, acres, hectares, and more.

acacirc inha+14 more

Digital Storage Converter

Convert between bits, bytes, kilobytes, megabytes, gigabytes, terabytes, and more.

bBKbKB+10 more

Density Converter

Convert density measurements like kg/m³, g/cm³, lb/ft³, and more.

gr/galgr/galg/cm³g/L+17 more

Electric Current Converter

Convert electric current measurements like amperes, milliamperes, and more.

abAABicA+19 more

Energy Converter

Convert energy measurements like joules, calories, kilowatt-hours, BTU, and more.

BTUBTUcalcal+31 more

Force Converter

Convert force measurements like newtons, pound-force, dynes, and more.

dynkgfkNkip+8 more

Fuel Consumption Converter

Convert fuel consumption measurements like mpg, L/100km, km/L, and more.

bikeF150KonaModel S+18 more

Length Converter

Convert length measurements like meters, feet, inches, kilometers, miles, and more.

ÅAUbccable+27 more

Mass & Weight Converter

Convert mass measurements like kilograms, pounds, ounces, grams, stones, and tons.

ctcentaldagM⊕+22 more

Power Converter

Convert power measurements like watts, horsepower, kilowatts, and more.

BTU/hBTU/minBTU/scal/h+22 more

Pressure Converter

Convert pressure measurements like Pascal, Bar, PSI, atmospheres, and more.

atmbarcmHgcmH₂O+31 more

Speed Converter

Convert speed measurements like km/h, mph, m/s, knots, and more.

cm/mincm/sft/hft/min+20 more

Temperature Converter

Convert temperature measurements like Celsius, Fahrenheit, Kelvin, and Rankine.

°C°FK°R+1 more

Time Converter

Convert time measurements like seconds, minutes, hours, days, weeks, and years.

cddecfs+19 more

Volume Converter

Convert volume measurements like liters, gallons, cubic meters, fluid ounces, and more.

ac·ftbblbubu+37 more

Why Use Our Unit Converter?

100% Free

All converters are completely free to use with no hidden fees or limitations.

Works Offline

Once loaded, conversions work without internet connection.

Privacy First

All calculations happen locally in your browser. Your data never leaves your device.

Accurate Results

Based on international standards and scientific constants for precise conversions.

Easy to Use

Clean interface with instant results. No complex settings to configure.

Mobile Friendly

Works perfectly on phones, tablets, and desktop computers.

Popular Conversions

Kilometers → Miles Celsius → Fahrenheit Kilograms → Pounds MB → GB Liters → Gallons Meters → Feet Hours → Minutes PSI → Bar

Tool Capabilities

Client-Side (Browser)

Files never leave your device

Convert between 100+ units
Categories: length, weight, temperature, volume, etc.
Real-time conversion as you type
Swap input/output units
Common conversion presets

Requires Server-Side

Not available — would need cloud processing

Live currency exchange rates
Real-time fuel price conversions
Custom unit definitions & formulas

Live currency and commodity price data require real-time API feeds from financial data providers.

TL;DR - Free Unit Converter

Convert between units of length, weight, temperature, digital storage, time, area, volume, speed, energy, and pressure. Supports 100+ units across 10 categories. 100% client-side - all calculations happen in your browser.

10 categories100+ unitsFast conversion100% private

JumpTools vs Google vs ConvertUnits vs UnitConverters

How does our unit converter compare to popular alternatives?

Feature	JumpTools	Google Unit Converter	ConvertUnits	UnitConverters
Price	Free	Free	Free	Free
Privacy	100% client-side	Data sent to Google	Server-side	Server-side
Platforms Supported	All browsers	Search / mobile	Web	Web
Mobile Friendly	Yes	Yes	Yes	Yes
Offline Support	Yes	No	No	No
No Signup	Yes	Yes	Yes	Yes

Comparison as of March 2026. JumpTools performs all conversions in your browser with no data sent to any server.

Frequently Asked Questions

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