Unit Converter

Contains adsIn-app purchases
190K reviews
Content rating
Everyone
10M+
Downloads
Enjoy this app for free, and many more free of ads and in-app purchases, with a Google Play Pass subscription. Learn more
Content rating
Everyone
In-app purchases
Learn more
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About this app

🔢 Unit Converter is the all-in-one measurement, currency and calculation toolkit — rebuilt from the ground up with a clean modern design, 18 color themes, and a huge 87 unit categories (one of the most complete collections on the Play Store).

🌍 Over 10 million downloads worldwide.

Students, engineers, tradespeople, cooks, travelers, DIYers — whatever you need to convert or calculate, it's here, and most of it works fully offline.

📐 87 UNIT CATEGORIES
Length, weight, area, volume, temperature, speed, pressure, energy, power, data, fuel, angle, force, torque, frequency and dozens more — from everyday units to advanced engineering scales.

💱 LIVE CURRENCY & PRECIOUS METALS
• 145 world currencies with regularly updated rates
• Live gold & silver prices
• Interactive rate-history charts (7D · 30D · 1Y)
• Rate alerts — get notified when a currency hits your target
• Add your own custom currencies

🔧 PRO ENGINEERING UNITS
Specialist converters including Plumbing, Electrical and Medical — built for professionals on the job.

🧰 48 HANDY TOOLS
Resistor & capacitor color codes ▸ AWG/SWG wire gauge ▸ scientific calculator ▸ password generator ▸ periodic table ▸ compass ▸ bubble level ▸ protractor & ruler ▸ stopwatch ▸ Morse code ▸ time-zone converter ▸ screen flash — and many more.

💰 20 FINANCE CALCULATORS
Loan & EMI, simple/compound interest, mortgage, tax, discount, ROI, CAGR and more.

🧮 22 MATHS CALCULATORS
Percentage, fractions, algebra, geometry, statistics, GCD & LCM, permutations & combinations and more.

✨ POWERFUL EXTRAS
📄 Export results to PDF & CSV
☁️ Back up & sync with Google Drive
⭐ Favorites for one-tap access
🕘 Unlimited, searchable history
⚡ Batch convert & side-by-side compare
🧩 Create custom units
📲 Home-screen widgets & app shortcuts

🎨 MAKE IT YOURS
◆ 18 stunning color themes (Deep Sea, Coral Reef, Solar Flare and more)
◆ Light & dark mode
◆ Clean, modern Material design
◆ Available in 30+ languages

WHY YOU'LL LOVE IT
✓ 87 categories — more than most converter apps offer
✓ Works offline (currency refresh needs internet)
✓ Fast, accurate and easy to use
✓ Free to download — go premium to remove ads and unlock extra themes, cloud sync and more

🔐 PERMISSIONS & WHY WE USE THEM
We're a utility app and request only the essentials — no location, contacts, camera, microphone or storage access.
★ Internet & network access — to fetch live currency, gold & silver rates and sync your cloud backup.
★ Notifications — to deliver the currency rate alerts you set.
★ Advertising ID — used to show ads in the free version only.
★ Google Play billing — to remove ads and unlock premium features.
Exports use Android's built-in file picker, so no storage permission is required.

Download Unit Converter and get every conversion, calculator and tool in one beautifully designed app. 🚀
Unit & currency converter + calculator, 87 categories, tools, finance, math
Updated on
3 Oct 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region and age. The developer provided this information and may update it over time.
  • This app may share these data types with third parties
    Location, App activity and 2 others
  • This app may collect these data types
    Location, App activity and 2 others
  • Data is encrypted in transit
  • Data can’t be deleted

Ratings and reviews

184K reviews
Reginald Thompson
6 September 2026
edit: WAS One of the most useful apps I've ever used. the small amount for premium used to unlock everything, and it was a really small amount as I recall. now they want it again and for a less useful app than it was originally and yes i restored no I wont be giving you more money. Since they've updated and have a "new look" some of the features suck, ie. I cant change the distance driven to miles on trip cost but can change to mpg. The ring and clothes sizing aren't as easy either.
31 people found this review helpful
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A Google user
28 November 2018
I really like this app as it's easy to use and certainly all inclusive in its conversion options. The only thing I'd change is letting the user choose to open the app on the favorites page rather than a page containing all of the conversion units, as it currently does. The user is able to choose favorites, but that section is only accessible via a side menu. That's even after buying the premium version. Since I know this is just a lazy complaint on my part, I still give it 5 stars, but providing an option to open on the favorites screen is something I wish the developers would consider.
114 people found this review helpful
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DIGIT GROVE
9 May 2019
Glad to hear that you like our Application. We will add more useful functionalities in future.
David Melfe
21 February 2021
Useful app - edit- I've had this app for three and a half years now. I reference it far more often than I ever imagined I would. It's simple to use and is very handy for quick conversions. You can't go wrong with this purchase. I also applaud the updates. By far the most useful app I have ever purchased. Once you remember that you have it, it becomes a great resource on demand. Even for travel, I have found the currency conversion very up to date. If there was a 10 star option this app gets it.
19 people found this review helpful
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DIGIT GROVE
21 February 2021
We are proud and totally flattened by the appreciation from you. Glad to hear that you like our Application. We will add more useful functionalities in future. Thanks for your support.

What's new


Version 3.0.042
✓ 93 unit categories, new: Large Numbers (lakh, crore), Gold Weight (tola), Acceleration, HbA1c, Vitamin D, Triglycerides
✓ Type "5 ft to cm" in Search for an instant answer
✓ Long-press to paste/copy numbers, common units first, more accurate results
✓ 22 color themes + 10 fonts, live currency & gold rates, Contact us menu
✓ 48 tools, 30 finance & 30 math calculators, Favorites, PDF/CSV, Drive backup