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
Condition: New
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This item is eligible for return within 30 days of receipt
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Monday, Aug 4
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Color: Gold
Style: F91W
Is Discontinued By Manufacturer : No
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
Country of Origin : China
Best Sellers Rank: #362 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #1 in Men's Wrist Watches
Brand, Seller, or Collection Name: Casio
Model number: F91WM-9A
Part Number: F-91WM-9ACF
Model Year: 2017
Item Shape: Rectangular
Dial window material type: Mineral
Display Type: Digital
Clasp: Buckle
Case material: Resin
Case diameter: 33 millimeters
Case Thickness: 35.2 millimeters
Band Material: Resin
Band size: 8.75 inches
Band width: 18 millimeters
Band Color: Black
Dial color: Gold
Bezel material: Resin
Bezel function: Stationary
Calendar: Day
Special features: Chronograph, Timer, Lightweight
Item weight: 3.2 ounces
Movement: Quartz
Warranty: Manufacturer’s warranty can be requested from customer service. Click here to make a request to customer service.
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Aug 4
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Color: Black
Style: F-91W-1
I ordered this watch to have a basic, functional wall before a backpacking trip. It's easy to set, is slim and light, and it looks just the right amount of old school dorky. I'm not taking it scuba diving, so I didn't need the water resistance of a G-Shock, so this is a great value for the money when you need a basic watch to tell time, and know it will keep running accurately.
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Reviewed in the United States on June 17, 2025 by AG
Color: Clear Blue
Style: F91W
The Casio F91W is a classic digital watch that’s perfect for everyday use. It’s lightweight, durable, and super reliable. The display is easy to read and shows the hour, minute, second, day, and date. It also has helpful features like a daily alarm, LED light, and a 1/100 second stopwatch—great for timing quick tasks. One of the best parts? The 7-year battery life means you rarely have to worry about it dying. Plus, it’s water-resistant, which adds to its practicality for daily wear. If you’re looking for a simple, affordable, and trustworthy digital watch, the Casio F91W is hard to beat.
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Reviewed in the United States on July 26, 2025 by Sackett Outbound Sackett Outbound
Color: Black
Style: F-91W-1
This is hands-down the best budget daily watch I’ve ever owned. It’s sleek, durable, and super comfortable—you can wear it all day without even noticing it’s on. The classic Casio design looks great and goes with anything, and the bright backlight is a nice bonus for low-light situations. What I love most is that it’s helped me check the time without constantly reaching for my phone, which has actually helped me stay more focused throughout the day. If you want a no-nonsense digital watch that’s built to last, this is the one. Highly recommend.
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Reviewed in the United States on June 11, 2025 by Juandaniel Mercado Juandaniel Mercado
Color: Green
Style: F91W
Simple, cheap, reliable, timeless design (pun intended). Replace the plastic band with a sturdy NATO strap for a durable and iconic style.
Reviewed in the United States on July 17, 2025 by handypro
Color: Black
Style: F-91W-1
I had been looking for a relatively cheap digital watch, preferably from Casio, as a simple watch to start the New Year off with. When I searched "casio digital watch" this was about the second product listing, so I knew it had to be a decent watch. I had worn it for a day or two and have since replaced it with the [insert link here]. Here is my review of the Casio F91W-1 and an explanation of why I replaced it. --------------------------------------------------------------------------------------------------- Design & Build: For just over $10, this Casio has great build quality and a cool retro design. In fact, the Casio F91W has been produced since 1991 and even has its own Wikipedia (https://en.wikipedia.org/wiki/Casio_F-91W) page! The design of the Casio is simple and classic and is probably one of the reasons why this watch is still successful after 25 years! The watch is very thin, - only 8 millimeters - especially for a digital watch, which is about the same thickness as an iPhone 5. The watch face is made of plastic and is not recessed into the body, meaning that while it is flush with the casing it can be scratched easily. The casing of the watch is made of resin which is pretty standard in most digital watches. The band is also made of resin and is comfortable enough for a $10 watch. One complaint that I have about the watches build quality is the material of which the band buckle is made of. The band buckle is made of ordinary black plastic which I can see breaking in a year or two. While I can't vouch for the longevity of this watch, I can almost confidently say that that plastic buckle will be the first part to break. Other than that, the watch features nice easy-to-press buttons which stick out from the watch a millimeter or two. The buttons are very easy to press, which can be both a good thing and a bad thing as they might be pressed accidentally. The top left button activates the display light which is very weak and only lights up from one side of the display, meaning that the left part of the display is kind of bright while the further you get to the right side of the display the light dims drastically. This seems like one of the areas Casio had to cut corners with in order to cut the cost, however, it is only a minor complaint with a $10 watch. The light shines a green light and only turns on while the button is depressed, which is kind of annoying. Digital watches I have owned in the past stayed on for a few seconds, but again, this is only a minor complaint with a $10 watch. Finally, the Casio features water RESISTANCE, not waterproofing, therefore I wouldn't go swimming with it, however, other users have reported diving with it so the decision is ultimately up to you. Overall, the Casio F91W features a simple and timeless design, as well as pretty good build quality for $10. The display light has some issues and the watch is only water resistant, but these things don't matter too much in a $10 watch. --------------------------------------------------------------------------------------------------- Fit: I have around a 6-inch wrist and this watch fit great. I used a hole more towards the end of the band away from the case and it fit comfortably while not being too loose. The watch is very light and once it is on you almost forget it is there. The case is also thin and doesn't add much bulk to your arm. For me, the watch face was a good size proportionate to my wrist. It might have been a little small for my liking but it definitely didn't get in the way. Overall, I am happy with how the F91W fit on my wrist. --------------------------------------------------------------------------------------------------- Overall: This watch is a great watch for the price. While I can't vouch for the longevity of this watch, I can say that it features a great design and decent build quality, as well as a good and comfortable fit (at least for my wrists). To conclude, if you have a bit over $10 to spend on a digital watch, you really can't go wrong with the Casio F91W. --------------------------------------------------------------------------------------------------- Pros: - Classic simple design - Decent build quality - Comfortable - Thin and light - Easy-to-press buttons - Good fit for me - Accurate time-keeping (Casio claims that the watch is accurate to ±30 seconds per month due to the quartz movement of the watch) Cons: - Weak plastic band buckle - Easily scratched plastic face - Weak and poorly designed display light - Buttons may get accidentally pressed - Only water resistant --------------------------------------------------------------------------------------------------- Why I Replaced it: Even though the Casio F91W is a great watch for the money, I decided I wanted something a bit nicer, even if it meant spending a little bit more money. After browsing Amazon for other Casio watches, I came across the G-Shock G100-BV Men's Black Resin Sport Watch. The reason why I replaced the F91W isn't because it isn't a good watch, instead, I replaced it because I wanted something a little nicer with a more rugged design. To conclude, I replaced the F91W not because it wasn't good, but because of personal preference. --------------------------------------------------------------------------------------------------- If you found this review helpful I would appreciate it if you clicked the "helpful" button below this review. Thanks!
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Reviewed in the United States on December 31, 2016 by Patrick Mains
Color: Black
Style: F-91W-1
Great watch for every day use. Comfortable and long lasting. I've been wearing this watch daily for six months now, and it's holding up great with minimal scratching. I wash my hands with it on, but I do not shower or swim with it, so I cannot truly attest to water resistance though it seems okay. Watch quality: Decent. Time display: Has a light that is decent quality. Great low price watch.
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Reviewed in the United States on June 20, 2025 by Cassie B
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.
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Reviewed in the United States on June 25, 2025 by Jennifer