Meter is the SI base unit of length.
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Universal Converter is a free, all-in-one conversion platform covering 27 measurement categories and over 6,400 units, including length, weight, temperature, volume, currency, digital storage, pressure, agriculture, astronomy, cooking, and engineering. Search or browse by category, get instant accurate results with source definitions and formulas, and use the same converter for everyday tasks, scientific work, and business calculations, online or offline.
Converter
Length Converter
Convert metric, imperial, and nautical distance units.
Context values
Some unit families need one extra value for a physically accurate result.
Foot equals exactly 0.3048 meters.
Multiply by the source factor, then divide by the target factor.
Results update instantly as you type.
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Universal Converter by the numbers
A converter built at real scale
Every figure below reflects what is actually running behind the calculator: real unit definitions and real generated conversion pages, not placeholder content.
27
Measurement categories, spanning everyday length and weight through agriculture, astronomy, and engineering.
6,413
Individual unit definitions supported across every category, including metric prefixes and regional variants.
394,700+
SEO conversion pages generated site-wide, each with a formula, FAQ, and related conversions.
Popular Conversions
Launch status
Accurate, transparent, and ready for daily use
Last updated: June 25, 2026. Core SI, metric, imperial, and US customary factors are documented in the converter definitions. Currency rates use offline sample values unless a live API endpoint is connected.
Accuracy information
Exact constants are used where definitions are fixed, including inch, foot, mile, pound, acre, liter, and US gallon relationships.
Source references
SI definitions are aligned with BIPM and NIST references. Non-SI common units include definition notes in the result panel.
View referencesOffline and private
Converters run in the browser. Favorites, history, newsletter signups, and custom units stay on this device for privacy.
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Business, finance, health, date, and agriculture calculators
Currency API ready
Agriculture suite
Client-side results
Currency converter
API-ready exchange calculator with offline fallback rates.
Percentage calculator
% of
30
BMI calculator
Age calculator
Choose a dateDate calculator
Mortgage calculator
Fuel cost calculator
Agriculture calculators
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Why Universal Converter
Thousands of units
Search SI, imperial, US customary, scientific, engineering, cooking, agriculture, astronomy, and digital units from one place.
Accurate formulas
Exact constants are used where definitions are fixed, and formula notes explain how each result is calculated.
Free forever
The core converter is built as a free public utility with no account required for everyday conversions.
Works on mobile
The calculator, category grid, search, guides, and SEO pages are responsive for phones, tablets, and desktops.
Offline support
PWA caching keeps the main app shell available after installation on a hosted HTTP or HTTPS deployment.
SEO-ready utility pages
Helpful guides for common calculations
Explore focused pages for unit converter searches, calculator tasks, high-value measurement searches, formulas, FAQs, and related conversion clusters.
Built like a real conversion business
Privacy-friendly analytics
Usage is measured anonymously to guide improvements, without selling or sharing personal conversion data.
Ad-supported and free
Display ads are placed to stay out of the way of the calculator so every tool stays free to use.
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Subscribe to hear about new calculators, unit coverage, and conversion guides as they launch.
Custom units
Save unit definitions that matter to your team or industry, right in your browser.
More on the way
Saved workspaces, an ad-free mode, team calculators, CSV export, and API access are on the roadmap.
Common questions
What is a unit converter?
A unit converter changes a number from one measurement unit to another, such as kilograms to pounds, meters to feet, Celsius to Fahrenheit, or GB to MB.
How accurate are conversions?
Many relationships are exact by definition, including inch, foot, pound, liter, and US gallon relationships. Approximate units are described in their definitions.
Which units are supported?
Universal Converter supports metric, imperial, US customary, scientific, engineering, digital, cooking, agriculture, astronomy, electricity, pressure, energy, and more.
Is Universal Converter free to use?
Yes. The core converter, calculators, category browser, and guides are free to use with no account or sign-up required.
Does it work without an internet connection?
Once installed as a PWA, the main app shell is cached and stays available offline. Favorites, history, and custom units are also stored on your device.
Learn the conversions behind the numbers
How Digital Storage Units Work
Bits, bytes, decimal prefixes, binary prefixes, and the difference between GB to MB and GiB to MiB.
Read guideCelsius vs Fahrenheit
The difference between Celsius and Fahrenheit, conversion formulas, and worked examples.
Read guideMetric vs Imperial System
Common units, exact relationships, and practical tips for converting between metric and imperial.
Read guideHow Pressure Units Work
Pascal, bar, PSI, atmosphere, and mmHg compared, with practical conversion formulas.
Read guideMore conversion guides and tips
Our mission
Making every measurement easy to trust
Universal Converter exists to make unit conversion fast, accurate, and free for everyone, from students and cooks to engineers and business teams. We publish exact definitions and formulas alongside every result, keep the core tool free with no account required, and build for offline use so a converter is available wherever you're working.