Convert Anything, Instantly
Length, mass, temperature and volume. Your answer in a tap. Type a number and Convert Smart answers as you type, with tap-to-copy results and the units you actually use.
Type Once, Converted Instantly
No convert button, no waiting. The answer updates as you type, with the conversion rate right underneath so you can sanity-check it.
- Mass: kilograms, grams, pounds, ounces, stone.
- Length: millimeters, centimeters, meters, kilometers, inches, feet, yards, miles.
- Temperature: Celsius, Fahrenheit, Kelvin.
- Volume: milliliters, liters, teaspoons, tablespoons, fluid ounces, cups, pints, quarts, gallons.
Tap to Copy, Tap to Swap
Tap any result to copy it instantly, ready to paste into a message or note. Tap the swap arrows to flip the conversion the other way.
Your Units, Your Way
Pick the units you use most in every category. Region-aware defaults and localized languages mean it feels right out of the box, wherever you are.
Simple on Purpose
Instant Answers
Results update live as you type. No convert button, no waiting.
Tap to Copy
Tap any result to copy it instantly, ready to paste anywhere.
One-Tap Swap
Flip the conversion direction with a single tap on the swap arrows.
Region-Aware
Localized languages and sensible default units for where you live.
No Account
No sign-in, no tracking, no analytics. Conversions happen on your device.
Free to Use
Supported by minimal, non-personalised banner ads, never a subscription.
Private by Design
Convert Smart requires no account or sign-in. Conversions happen entirely on your device, and the app contains no analytics or user tracking.
The app displays lightweight banner ads to stay free. These ads are non-personalised. Convert Smart never requests the iOS advertising identifier (IDFA) and does not use App Tracking Transparency, because nothing is used to track you across apps or websites.
No ads are shown at all to users on European Economic Area, United Kingdom, or Switzerland App Store accounts. Everywhere else, an optional one-time purchase removes ads for good.
Full details are in the Convert Smart privacy policy.