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
Buy Now, Pay Later
As low as
$8
/ mo
Learn more
- – 4-month term
- – No impact on credit to apply
- – Instant approval decision
- – Secure and straightforward checkout
Ready to go? Add this product to your cart and select a plan during checkout.
Payment plans are offered through our trusted finance partners Klarna, Affirm, Afterpay, Apple Pay, and PayTomorrow. No-credit-needed leasing options through Acima may also be available at checkout.
Learn more about financing & leasing here.
Selected Option
Free shipping on this product
30-day returns
Learn more
FREE 30-day refund/replacement
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
Availability:
15 left in stock
Arrives
Wednesday, May 20
Recently Viewed
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
Product Warranty: For warranty information about this product, please click here
Best Sellers Rank: #1,952 in Clothing, Shoes & Jewelry (See Top 100 in Clothing, Shoes & Jewelry) #2 in Men's Wrist Watches
Brand Name: Casio
Age Range Description: Adult
Model Name: F-91WM-9ACF
Model Number: F91WM-9A
Global Trade Identification Number: 10
Manufacturer: Casio
UPC: 889232140810
Item Type Name: Watch
Included Components: the brand's case
Item Weight: 0.09 Kilograms
Display: Digital
Watch Movement Type: Quartz
Power Source: Battery Powered
Closure Type: Buckle
Strap Type: Two Piece Strap
Sport Type: Walking
Clasp Type: Buckle
Water Resistance Level: Water Resistant
Embellishment Feature: Crystal
Band Material Type: Resin
Case Material Type: Resin
Crystal: mineral
Style Name: F91W
Shape: Rectangular
Band Color: Black
Dial Color: Gold
Character: Fashion
Pattern: Solid
Face Style: F91W
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:
Wednesday, May 20
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.
- Klarna Financing
- Affirm Pay in 4
- Affirm Financing
- Afterpay Financing
- PayTomorrow Financing
- Financing through Apple Pay
Learn more about financing & leasing here.
Similar Products
![Apple Watch Ultra [GPS + Cellular 49mm] Titanium Case with Midnight Ocean Band, One Size (Renewed)](https://m.media-amazon.com/images/I/810JR81LIsL._AC_US500_.jpg)
![Samsung Galaxy Watch Ultra (2024) 47mm LTE AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, GPS,Titanium Silver [US Version, 1Yr Manufacturer Warranty]](https://m.media-amazon.com/images/I/817QHxxq34L._AC_US500_.jpg)
![Samsung Galaxy Watch Ultra (2024) 47mm LTE AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, GPS, Titanium Gray [US Version, 1Yr Manufacturer Warranty]](https://m.media-amazon.com/images/I/81UQDoHG7pL._AC_US500_.jpg)
![Apple Watch Ultra 2 [GPS + Cellular, 49mm] - Titanium Case with Blue Ocean Band, One Size (Renewed)](https://m.media-amazon.com/images/I/6165pya85SL._AC_US500_.jpg)
![Samsung Galaxy Watch Ultra (2024) 47mm LTE AI Smartwatch w/Energy Score, Wellness Tips, Heart Rate Tracking, Sleep Monitor, Fitness Tracker, GPS, Titanium White [US Version, 1Yr Manufacturer Warranty]](https://m.media-amazon.com/images/I/81rbj+RbISL._AC_US500_.jpg)
![Apple Watch Ultra [GPS + Cellular 49mm] Titanium Case with Green Alpine Loop, Large (Renewed)](https://m.media-amazon.com/images/I/916acEhBkcL._AC_US500_.jpg)
Top Amazon Reviews
Color: Black
Style: Minimalist
I’m very happy with this watch. It is simple, light, and comfortable to wear every day. The time is easy to read and the buttons work well. The battery lasts a long time and the alarm is useful. For the price, the quality is really good. It does exactly what I need. I would recommend it if you want a basic and reliable watch.
...
show more
Reviewed in the United States on February 3, 2026 by Luis H. Luis H.
Color: Black
Style: F-91W-1
Bought this for a friend. It really is a great watch, if all you want is something on your wrist to reliably keep great time and last forever at a low cost. If you want a piece of jewelry or a status symbol, this isn't it, but if all you want is a watch that serves it basic intended function this one is the gold standard.
...
show more
Reviewed in the United States on February 14, 2026 by phoenix
Color: Black
Style: F-91W-1
There are simply too many reviews of this watch. So instead of a review I’d like to share with you a conversation I had the other day with one of my co-workers. Co-work: What’s that on your wrist? Did you borrow that watch from you 10 year old son? It’s so small and cheap looking. I didn’t think you ever knew how to read a LCD display. Casio F-91W Owner: It’s a Casio F-91W, and no I didn’t borrow it from my son, but sometimes I let him borrow it from me. I know that I typically, prefer analogue watches with a mechanical or automatic movements. I did need to read the instruction manual I figure out how to read the digital display. Once I figured out that the colon on the display is separating the hours (on the left) from the minute (on the right) and the smaller numbers on the far right represent the seconds; it’s actual easier to read that the 3 hand analogues. Co-work: So, why did you buy this watch? It doesn’t seem to fit in with your Seiko 5, Orient, HMT, Citizen Eco-drive or that Chinese knock-off of an expensive German watch you can’t afford, that you typically wear to the office. Casio F-91W Owner: It’s nothing like my other watches, but this watch is one of the great classics. This model was first made in 1991, and was the smart watch of its time. The features and price-point is also unbeatable. I got it specifically because I am going on vacation to the beach and I wanted an affordable watch to wear of the beach and in the pool. This is proven technology; this model has been manufacture for over two decades and it’s almost bombproof. Co-work: Doesn’t WR mean Water Resistant; like splash and rain resistant only. I thought you need at least a 50m or 100m rating to take it swimming. Casio F-91W Owner: You are completely correct, and completely wrong. A watch worth worrying about needs at least a 50m or preferable a 100m rating just for swimming on the surface more or less. Personally, I wouldn’t take any of my other watches swimming on purpose, even though some of them have a 100m rating. However, this Casio is very modest in cost and I consider the manufactures water resistance rating is very under stated. Sure, if I ruin this watch swimming, the manufacture going to tell me to fly a kite, if I made a warranty claim, but this is a ten dollar watch. If you have ten dollars to wager, like I do, throw caution to the wind or perhaps dive in head first with it. It’s a lot like jaywalking, it’s not recommended, but you not trueing living your life to the fullest if you follow every rule. I sure a G-Shock with 200m water rating is manufacture with more seals and offers better water protection, but I also think that the water resistance rating is partially just marketing to separate Casio’s $10 watches from their $100 watches. I’ve taken this watch in the ocean and dove in swimming pools with no problems. I’d recommend not pressing the buttons when it’s wet, as well as not being a cry baby if you ruin it, but this watch is suitable for swimming in my book. Co-work: Wow, what a risk taker, they must be paying you too much, if you have ten bucks to risk like that. So you say it’s was the smart watch of its time back in the day. What’s so smart about this watch? Casio F-91W Owner: Well for starters, a day-date complication with annual calendar, that only needs to be corrected for leap years. It switches between AM/PM and 24 hour format with a single push of a button. It has a hourly repeater that can be turned on and off. A stopwatch function, and am alarm. Did I mention it has a very dim light, and I believe it was y2k compliant nearly a decade in advance. Co-work: Wow, I think my iwatch can do all that, but I don’t know how to. I also paid a lot more than you, and I can’t take it swimming. How about battery life? Where’s the charger plug? Is it self-winding, like you Seiko 5, and going to die after a few days off your wrist? I know for sure that in 1991 there was no such thing as wireless charging. Casio F-91W Owner: It’s much for low tech then wireless charging, or self-winding. It’s powered by a replaceable battery. Casio claims 7-years on a single battery with no daily recharging required. It’s more likely that the strap will break, before the battery will need to be replaced. It doesn’t need any sunlight either, some people claim to get 10 years on a single battery, it really depends on how frequent the light and alarm functions are utilized. In theory you could hide out in a cave for years without worrying about charging or replacing the battery. Co-work: Hey, one more question. I know you are married, but ascetically speaking, do you think I watch like this would be helpful in attraction women? It’s kind of ugly looking. Casio F-91W Owner: Well my friend, with you ugly face and abrasive personality, if a woman takes the time to look at your watch, she’ll be excited to see a practical watch on your wrist. Well unless she’s a gold digger type, but you don’t need that. Any women that can’t appreciate a classic watch like this doesn’t even desire to go dutch at McDonalds with you. However, for you, I’d strongly recommend the Casio CA53W, if you want a line of highly desirable ladies wanting to go out with you. If you wear a Casio CA53W and a lady starts a conversation about your watch, you’ll need to take her somewhere nice, like a sit-down type restaurant, and pay the whole bill, and she’ll surely want a second date when she see you generously calculate 18% gratuity with your calculator watch.
...
show more
Reviewed in the United States on October 10, 2016 by Matt
Color: Black
Style: F-91W-1
I’m over big, bulky watches. I’ve got my Suunto and a couple G-Shock watches. I still wear them, still love them, but mostly I just want a watch that keeps nice, precise time, doesn’t stand out from my wrist 3/4 inch and hopefully looks juuuust a little dorky. I’m also cheap. Waterproofness is important to me. I work a desk job. I commute by bus or train- watches help with that. I like to go on a run a couple times a week and wear a watch. I don’t sleep or shower with my watch on unless I’m camping or in a hotel. I like digital over analog because I kind of like to know exactly what time I think it is and I only ever estimate when I’m reading an analog watch because I’m lazy. Also, when I’m in a meeting or I’ve been pinned-down by someone I don’t want to talk to and I want to know if this really is taking forever or if my perception of the passage of time is just being warped- it’s easier to sneak a peek at a digital watch and get a precise read. I realized a few months ago that I really am just as happy wearing a $15 Casio as I am with my $250 Suunto and that most days I don’t need to know the barometric pressure. Some days, yes. Most days, no. But I like having a variety of watches (including the Suunto, which is fabulous). And I like to choose which watch to wear each morning. That’s fun for me. Recently I got on Amazon and ordered a bunch of new cheap Casio watches. I got four new watches for $52. I think Timex’s are over-priced. That’s how cheap I am. Casio W-800HAV ($20-ish) Digital Black. My eight-year old son and I each got one of these watches for Christmas 2016. We both love it. We both have other watches but wear this one the most. It has a fairly low profile- doesn’t catch on pockets or shirt sleeves. I love the light- it looks stupid, like piddly. But it actually lights the face well. I go jogging at night sometimes. The light works well enough for me to see how slow I am even while I’m bouncing down the road. And it’s got “Dual Display”. I don’t know what else to call that. It shows the time on one part of the screen and at the same time it show the stopwatch numbers. Nice to keep track of both. Or, If I’m out and about, I’ll set a stopwatch when the train goes by because I know that the train comes by every 15 minutes. So I can see when I’m coming up on another 15-minute mark and also see the time on the sub-display. Casio F-201WA ($10.47) Digital Black. Comfortable. Lightweight. Easiest buttons to push. Good light. I like that it has countdown timer and lots of alarms. I miss being able to see the time when it’s in stopwatch mode like I can with the W-800HAV and the WV-200A. Casio WV-200A ($40-ish) Waceceptor Digital Black with chrome and red. Looks good. Like the steel case. Good protection for the glass. Relatively heavy. A liiiiitle too thick. Really nice buttons. Great electro-luminescent light. This one is the only watch of the group that you can set it so it doesn’t beep every time you push a button. I really like being able to turn the beep off. Sometimes I like to set a stopwatch in a meeting so I can see how long somebody is going on with some bullsh*t. Strangely, timing somebody’s bullsh*t is a nice distraction from the bullsh*t. But I don’t like my watch to beep when I’m doing pushing buttons. “Dual display”- you can still see what time it is when you’re in other modes. Countdown timer is nice and many of my other watches don’t have one. I don’t give it extra points for the whole Wave Ceptor thing. Doesn’t add any value for me and it kinda sucks battery. This watch has been on my wrist for a full day of snorkelling and handled it beautifully. I live in a land-locked state, so when I get to the ocean, I’m in the water ALL DAY LONG. I can’t dive deeper than maybe 20 feet, so it’s not a serious test for a watch that says it’s good to 200m. But if you’re diving to 200m and time is critical, you’re going to spring for something more than a $40 Casio. (I love you, Casio). Casio HDA-600 ($14.79) Black Analog. Not the most comfortable. Kinda squeezes my wrist from bone to bone or flops around a bit. I dunno, it just fits weird. YMMV. Love the face protector. Can’t wait until it starts to look a little banged up. Glowy dots on the hands aren’t really impressive. Date window works perfectly. Looks tough but it’s probably not. I like it a lot. Casio MQ24-7B2 ($14-something) White-faced Analog. Incredibly light. Truly forget that you’re wearing it. Easy to read. No date window. No lumi. Nice, simple and never catches your sleeve in a dress shirt. Yes, I’m fancy. Some people are smart enough to read an analog watch that doesn’t have numbers on it- just dots. I’m not one of those people. I screw it up enough when there’s numbers. This has numbers. I like numbers. Haven’t tested this one for waterproofyness. Casio only says it’s water resistant. I hardly ever do underwater demolitions anymore. Casio A168W-1 ($16.15) Stainless Digital. I love / hate this watch. I don’t know if Casio was really trying to make a watch that looks fancy but it’s really a dork-bomb, or if they we’re going for dork-bomb as their aim. Either way. This watch is a stunning success. I think this watch is the pinnacle of nerd-swank. 1980’s wannabe stockbroker, cool old guy who doesn’t give a sh*t, little bit of silver under the sleeve to catch someone’s eye- oh wait it’s a friggin Casio digital. I mean, it’s chrome-plated PLASTIC for crying out loud. How awesome is that? I love all of that. Love it. It’s got the Illuminator light, which works great. Clock, date, stopwatch and alarm. No countdown timer. The metal band is not comfortable. It’s got edges and it pulls on my arm fur. Clasp works great and it’s wicked-easy to adjust. Slips under a dress shirt easily. Again: super-dorky. Makes me smile every time I put it on. Then wince when it pulls the fur. Casio F91W-1 ($11.35) Black Digital. I like this watch a lot. It’s super thin. Very lightweight. The light looks stupid but it works well. The buttons are easy to hit. It ranks pretty high on the ‘Dork’ scale. People recognize it. Hold that one button down and it says CASIo. It’s great. Proud to say I’ve never worn this watch along with flannel and a beanie. Never.
...
show more
Reviewed in the United States on October 4, 2016 by James Davis James Davis