Measurement Converter Offline
Metric to Imperial Units
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Type a number and every unit updates at once — cm to inches, kg to lbs, °F to °C. Five categories, fully offline, zero clutter.
Typed "cm to inches" into a search bar for the third time today? ToolBox Converter turns that into one glance: open the app, type the number, and every unit you care about is already on screen — length, weight, temperature, volume, and time, fully offline.
Most converters make you pick one target unit and hope you chose right. ToolBox shows the whole row: enter 170 cm once and inches, feet, meters, and miles all update live as you type. Swap direction with one tap, copy any line, and star the pairs you use every week. Everything runs on device with exact factors (1 in = 2.54 cm, 1 lb = 0.45359237 kg) — no ads, no accounts, no waiting for a page to load.
WHAT YOU GET
• 170 cm reads as 66.93 in, 5.58 ft and 1.7 m on one screen — every unit in the category updates live as you type
• kg to lbs at the gym, oz to grams at the scale: swap direction with one tap and copy the answer straight into a message
• Baking from a US recipe: cups, tablespoons and teaspoons convert to milliliters with US-customary precision (1 gal = 3.785411784 L)
• 350 °F shows as 176.7 °C on a scale that marks freezing and boiling, so oven and weather numbers make sense at a glance
• Your "espresso dose" grams-to-ounces pair saved as a named Favorite — one tap next time instead of re-picking units
• The last 200 conversions save themselves to History, so yesterday's answer is still there when you need it again
PERFECT FOR
• Cooks and bakers translating US recipes to metric mid-recipe with flour on their hands
• Travelers reading road signs in miles and forecasts in Fahrenheit
• Students checking unit homework against exact conversion factors, not rounded guesses
• Lifters and DIYers moving between kg plates, lb dumbbells, feet and meters every day
WHY NOT JUST ASK SIRI OR SEARCH THE WEB?
A web search needs signal, shows one answer buried in ads, and forgets it instantly. ToolBox works in airplane mode, shows every unit at once, keeps your history, and remembers your favorite pairs — the fifth "kg to lbs" of the week is one tap, not another typed query.
PRIVATE BY DEFAULT
No account, no tracking, no network calls. Every conversion, favorite, and history entry stays on your device.
FULL ACCESS
ToolBox Converter requires Full Access, available as a Weekly or Yearly auto-renewing subscription, or a one-time Lifetime purchase. Full Access unlocks the complete converter: all five categories, live multi-unit results, named Favorites, and 200-entry History.
Download ToolBox Converter and settle your next "cm to inches" in the time it takes to type the number.
Terms of Use: https://leanstudio.asia/terms-of-use
Privacy Policy: https://leanstudio.asia/privacy-policy
Support: support@leanstudio.asia
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In-App Purchases
The developer, LEAN ASIA CO., LTD, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
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Information
- Seller
- LEAN ASIA CO., LTD
- Size
- 5.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Length Lifetime $19.99
- Temperature Yearly $9.99
- Weight Weekly $1.99
- Copyright
- © 2026 LEAN ASIA CO., LTD