Everyday Carry

Casio W800H Digital Watch

A 37 gram resin digital watch with 100 meter water resistance, a stopwatch, dual time, a snooze alarm and a battery rated for about 10 years.

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Mike ManningBy Mike Manning
Marine veteran, gym owner, dad
Recon Report: full review pendingPhotos: CasioUpdated 2026-09-16
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Product Information, Not A Review

Specs, pricing and buying notes taken from the manufacturer so you can compare this against whatever else you are looking at. I have not had this one in my hands. When it goes through real use it gets rewritten as a full review, with a rating and my own photos.

Casio W800H Digital Watch

Quick Specs

CategoryEveryday Carry
BrandAmazon
ReviewedSep 16, 2026
Case size (L x W x H)44.2 x 36.8 x 13.4 mm
Weight37 g
Water resistance100 meters
BatteryApprox. 10 years on CR2025
Stopwatch1/100-second, capacity 23:59'59.99, split time
LightLED backlight with afterglow
Other featuresDual time, multi-function alarm with snooze, hourly signal, full auto-calendar to 2099, 12/24 hour
Band fitResin band, fits 145 to 215 mm wrists
Glass and accuracyResin glass; accuracy +/-30 seconds per month

What Stands Out

  • Casio rates the CR2025 battery at about 10 years
  • 100 meter water resistance in a 37 g resin case
  • 1/100 second stopwatch with split time, good for timing sets and sprints
  • Dual time, a multi-function alarm with snooze and a full auto-calendar to 2099
  • LED backlight with afterglow, and the band fits 145 to 215 mm wrists

What To Check

  • Resin glass scratches more easily than mineral or sapphire
  • The Amazon listing groups several colorways, so confirm you are on the black W800H-1AV before buying
  • Casio's spec table for this model does not list a countdown timer; the AE1200WH or AE1500WH covers that

The Casio W800H is a plain black square digital that looks like it came out of a field kit. It weighs 37 g, carries a 100 meter water rating and runs on a battery Casio rates at about 10 years. It is one of Amazon's top sellers in Men's Wrist Watches.

The appeal is how little it asks of you. There is no app, no charger and no date to fix at the end of short months, since Casio lists a full auto-calendar to 2099. Set the time once, set a wake-up alarm, and it keeps running through lake days, yard work and early gym openings.

The Numbers That Matter

SpecWhat it decides
About 10 years on CR2025How long before you think about it again
100 m water resistanceWhether swimming and rinsing off are fine
37 gWhether you notice it during a lift
1/100 sec stopwatch, split timeWhether it times sets, sprints and laps

The stopwatch. Casio lists a 1/100 second stopwatch with split time and a capacity just under 24 hours, which covers anything from a 40 yard dash to a long drive.

The fit. The band fits 145 to 215 mm wrists, a wide range for a strap that may someday move from Dad's wrist to a kid's nightstand.

Who It Is For

The dad who wants a light, water-ready digital for the gym bag, the boat or the truck console. Skip it if you want a countdown timer; the Casio AE1200WH sets one to the second and the Casio AE1500WH adds auto-repeat. For a five-button training watch, see the Timex Ironman Classic 30, and for steel and a bezel, the Casio Duro MDV106.

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The Short Version

This is the watch to throw in a gym bag or tackle box and forget about for years. I would pick it for a dad who wants a stopwatch, an alarm and a light in something that weighs next to nothing. If you need a countdown timer for intervals, step over to the Casio AE1500WH.

Mike Manning

MIKE MANNING

Founder, Every Dad Carry

Dad | Coach | Marine Corps Veteran

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Casio W800H Digital Watch

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