The 10 Best Calculator Watches

The Digitech Vintage Retro (around $10) can transition seamlessly from your office to the gym, as the rubber strap is sporty, easy to clean, and relatively stylish. It has an alarm function, but don't expect to hear it unless you're in a completely silent environment.

The Casio DBC150-1 Digital (around $216) is capable of running your entire life, and the blue-tone face makes it quite an attractive accessory. It has a calendar function that allows you to keep track of important dates and appointments, as well as a massive 150-page data bank.

A low-budget smartwatch that can count your steps, play music, and take pictures, the Aeifond DZ09 (about $20) can also help you figure out the proper tip, thanks to its calculator function. It's compatible with both iOS and Android phones.

The time kept by the Casio CA506G-9AVT Databank (around $61) is remarkably accurate, with a claimed variation of only around 15 seconds per month. That reliability should ensure you're not late to any of the appointments you enter into its calendar feature.

While the G-Shock Classic (around $54) may take up a fair bit of room on your wrist, it is, nevertheless, a lightweight model that you'll soon forget is there -- until you need help with math, that is. Despite its wide face, it's not too bulky, so long sleeves fall over it easily.

The CA-56-1UW Digital (about $20) is an intuitive option with a nice sturdy band. Beyond its timekeeping and mathematical functions, there aren't a whole lot of extra features, but it will get the job done if that's all you really need it for.

The DBC310-1 Databank 300 (appx. $189) boasts an expansive memory that can store up to 300 pages, as well as an auto-sort function that lets you quickly organize all that information. It can memorize eight-letter words and numbers up to 12 digits long.

You can add a touch of class to your mathematical equations, thanks to the stylish finish on the Gold Tone 25 (around $60), which features a reliable, single fold-over clasp and a case that can handle submersion in water down to a respectable 30 meters.

The DBC32-1A Data Bank (about $25) offers four alarms that you can use to do everything from waking yourself up to making sure you're on time for important meetings. One of them has a snooze capability to allow you to catch a few more Zs when you're feeling extra tired.

If you need a little help with your sums, but you don't want to spend too much money for the privilege, the Vintage CA53W-1 (about $19) is likely your best bet. It includes a handy stopwatch you can use in gym class before you head off to algebra.