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Casio

Casio F91W Series | Digital Watch | Water Resistant | LED Light | 1/100 SEC Stopwatch | Regular Time Keeping (HR, Min, SEC, PM, Date, Day) | Daily Alarm | Lightweight | 7 Year Battery

  • Based on 16,557 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Friday, Oct 9
Order within 16 hours and 20 minutes
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Color: Gold


Style: F91W


Description

Designed for comfort and simplicity, the F91W combines essential features with long-lasting performance — a trusted choice for everyday use. A timeless look that works with anything, any day. A lighter, modern style that stands out without trying. Understated design for a sharp, all-black finish.

Product Dimensions ‏ : ‎ 4.2 x 3 x 2.1 inches; 3.2 ounces


Item model number ‏ : ‎ F91WM-9A


Department ‏ : ‎ Unisex


Batteries ‏ : ‎ 1 Lithium Metal batteries required. (included)


Date First Available ‏ : ‎ February 10, 2017


Manufacturer ‏ : ‎ Casio


Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.:


Best Sellers Rank: #650 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #1 in Men's Wrist Watches


#1 in Men's Wrist Watches:


Display: Digital


Watch Movement Type: Quartz


Additional Features: Chronograph, Lightweight, Timer


Power Source: Battery Powered


Strap Type: Two Piece Strap


Sport Type: Walking


Clasp Type: Buckle


Water Resistance Level: Water Resistant


Embellishment Feature: Crystal


Closure Type: Buckle


Style Name: F91W


Shape: Rectangular


Band Color: Black


Dial Color: Gold


Theme: Sports


Pattern: Solid


Face Style: F91W


Character: Fashion


Brand Name: Casio


Model Name: F-91WM-9ACF


Included Components: the brand's case


Model Number: F91WM-9A


Item Weight: 0.09 kg


Global Trade Identification Number: 10


Unit Count: 1 Count


Manufacturer: Casio


Number of Items: 1


UPC: 889232140810


Age Range Description: Adult


Item Type Name: Watch


Manufacturer Part Number: F-91WM-9ACF


Band Material Type: Resin


Case Material Type: Resin


Crystal: mineral


Case Diameter: 33 millimeters


Band Width: 18 millimeters


Case Thickness: 35.2 millimeters


Band Length: 8.75 inches


Bands: 1


Warranty Type: Limited


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Friday, Oct 9

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Classic Watch and She Loves It!
Color: Clear Pink Style: F91W
A classic, simple, and reliable watch. My wife loves it! Lightweight, comfortable, and easy to use with a timeless design. Great value for the price and a perfect everyday watch.
Reviewed in the United States on July 22, 2026 by MPR
    • Great watch
Color: Green Style: F91W
Worth the money, lightweight and perfect for things like running
Reviewed in the United States on September 7, 2026 by Luke
    • Great
Color: Gold Style: F91W
Has held up well so far and can't beat the price.
Reviewed in the United States on September 13, 2026 by Shl
    • Reliable, Lightweight, and Classic – A Timeless Everyday Watch
Color: Gold Style: F91W
The Casio F91W is a legendary digital watch for a reason—it’s simple, durable, and impressively functional for the price. Whether you’re looking for a reliable timekeeper or a lightweight backup, this watch delivers exactly what it promises. ✅ Why I Recommend It: • Lightweight & Comfortable: This watch is extremely light and easy to wear all day. The resin strap is soft but secure, making it great for casual wear, work, or workouts. • Clear Digital Display: The screen is easy to read, and the timekeeping includes hours, minutes, seconds, day, and date—all clearly shown. The AM/PM indicator is also helpful for those who prefer 12-hour format. • Reliable Features: It includes all the basics: • Daily alarm • 1/100 second stopwatch • Hourly time signal • LED backlight (enough to check the time in the dark) • Battery Life: One of the biggest pros is the 7-year battery life. It’s set-it-and-forget-it simple—no worrying about recharging or constant battery changes. • Water Resistant: It handles splashes, rain, and hand washing just fine. While it’s not meant for swimming or full submersion, it holds up great for everyday situations. 🧭 Perfect For: • Students • Travelers • Minimalists • Anyone who wants a no-fuss, durable watch at a low price ⸻ 💬 Final Thoughts: The Casio F91W is a classic for good reason. It offers unbeatable value with reliable timekeeping, useful features, and long battery life—all in a lightweight design. It’s not flashy, but it’s incredibly dependable. I highly recommend it as a backup watch, a gift for a first-time watch wearer, or just an everyday essential. ... show more
Reviewed in the United States on June 25, 2025 by Jennifer
    • Big things come in small packages.
Color: Gold Style: F91W
Review Image by Sailolau79
You can’t go wrong with the classic f91w. The new color ways are great and can go with anything. It is simple but reliable. Strap is good. Thin but easy to replace and now you can mod with various color variations. But if you have a wrist larger than 7in it might look funny and tiny. Luckily I can do a small dial but it does look small at times. It looks good in the pic but def on the smaller size. ... show more
Reviewed in the United States on July 1, 2026 by Sailolau79
    • Light blue F91-w.
Color: Clear Blue Style: F91W
I bought it as a "must have" in my collection. Small watch, digital, I like 38mm - 40mm (sweet spot) watches. However, i like this watch and will have fun with it maybe with a smart warch mod. I'm switching the band to a 20mm to give it some meat, 😆. I'll see how it goes. For $39., I'll have fun with it. ... show more
Reviewed in the United States on September 13, 2026 by Robert Burk
    • Best Watch
Color: Grey Style: F91W
Review Image by Karan Mehta
Best Watch to Own, hands down. Very snug and extremely light weight.
Reviewed in the United States on August 31, 2026 by Karan Mehta
    • Great product great price
Color: Gold Style: F91W
Great color and style, the light is a little dim but it’s nice at night to check the time and not be blinded by your watch
Reviewed in the United States on July 15, 2026 by Aaron

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