Unit Converter - Offline

Convert any unit instantly with this fast, easy-to-use unit converter and currency converter. Works fully offline, so you can convert length, weight, volume, currency and more anywhere, anytime.

With 43 categories and over 900 units and currencies, this all-in-one converter covers everyday conversions and specialized ones alike. Missing a unit? Email us and we'll look at adding it — or build your own custom conversion right in the app.

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Key Features

- 43 built-in categories covering hundreds of units

- Offline mode — internet is only needed to refresh currency rates

- Currency converter with exchange rates from the European Central Bank and other sources

- Custom conversion builder — create and save your own conversions

- Instant results while typing — no "Calculate" button; on larger screens see every unit's value at once

- Built-in calculator keypad with percentage calculations

- Search to quickly find any unit

- Unlimited favorite conversions for one-tap access

- Conversion history to revisit past calculations

- Copy, paste, and share results by email

- Light, dark, and black themes

- Landscape support on phones and tablets

- Available in English, German, Spanish, Portuguese, Romanian, Russian, and Ukrainian

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Conversion Categories

All categories support metric, US, and UK unit conversions.

- Length, area, and volume

- Currency exchange rates (European Central Bank and others)

- Clothing and shoe sizes for men, women, and children

- Cooking weights, fuel consumption, and time

- Weight, pressure, force, and torque

- Speed, acceleration, angular speed, and flow rate

- Density, dynamic and kinematic viscosity, and mineralization

- Data storage and data transfer

- Power, energy, and temperature (Celsius, Fahrenheit)

- Electric charge, current, capacitance, potential, and resistance

- Luminance and illuminance

- Radiation and radioactivity

- Magnetic field

- Numbers, roman numerals, fractions, SI prefixes, and astronomy distances

- Typography and sound

Perfect for students, engineers, cooks, travelers, and anyone who needs quick, reliable unit conversions on the go.

Have a question, a suggestion, or a unit request? Email uucmobile@gmail.com or leave a review — we read every one.

Unit Converter Calculator Plus

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