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M Running Stopwatch W500

Sale price: $24.99 Regular price:

Are you looking for a simple and precise watch to measure your running performances? Our W500 watch in size M is ideal for intense runs and interval training sessions.

Color: Select a color
Size: Select a size
Sale price: $24.99 Regular price:

Free shipping over $35

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San Francisco, 735 Market St. Options

Select an available color and size to see options.

Model: 8501808

Product Videos

Product Features

M Running Stopwatch W500 | Our team of running enthusiasts designed this watch for measuring your performances and programming your interval training.

Are you looking for a simple and precise watch to measure your running performances? Our W500 watch in size M is ideal for intense runs and interval training sessions.

A photo of the M Running Stopwatch W500 in use

Measurement settings

With date, alarm, back-lighting and 1/100 sec timer.


Program your training using its countdown function with 4 split-timers.


Waterproof index of 5 ATM (50m) and buttons for use underwater.


Large digits for better visibility.

Water resistant

Work out: your watch is resistant to salt and pool water and perspiration.

Easy assembly/dismantling

Change your strap easily with the exclusive slide system, no tools required.

Easy to use

Easy to adjust using the icons on the screen.

Product Customer Reviews

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3935 Reviews
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M Running Stopwatch W500,black
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Did the job but screen too dim...

Needed a stopwatch and this did the job... found that the screen was too dim (even with backlight). Still, if you don't need it in the dark - it's great!

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Hello Cindy

Thank you for your feedback :)

Your opinion is important to us as we continuously strive for our customers` full satisfaction. Our mission is to make sports accessible to others with good quality while at the same time maintaining very affordable prices. Value for money.

We will be very happy to have you back shopping with us.

Daniel Khoury

Fitness / Footwear Commercial Director & Buyer

decent value

Easy to use

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Great product

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Watch review

Another great value Decathlon product that just works.

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The display is dark

I could hardly see the numbers on the display, even it is illuminated, the visibility is low. I return the product 3 hours after receipt. The product display in the website is misleading, you couldn't see the clock with that viability. The sales agent is helpful to organise the return of the product.

Mens running watch

Great value product. Does what it promises. Is easy to read without my glasses and everyone mistakes it for a smart watch!

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Satisfied customer

Does exactly what it's supposed to do at a very reasonale price.

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Poor Quality

I bought this watch to replace a similar priced watch I purchased with Decathlon. I had to replace it as my previous one was stolen. I didn't hesitate in replacing with similar as I was very pleased with the quality and durability... but was very disappointed in comparison to the previous watch! The front marked and scratched very easily and was only used for snorkelling during a 2 week holiday. Also the watch is a 'mens' watch, but beware not much room for expanding the strap.

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This product is useless - the worst purchase ever.

Those who produce and sell this product should be thoroughly ashamed of themselves. This is by far the worse product I have purchased online. The instructions are a very bad joke. Avoid buying this product and probably anything else from Decathalon.

Hi Francis,

Sorry that you have not had a good experience with this watch. I can help find a solution, please could you provide the details regarding the problems you have encountered.


Durable and easy on your eyes with reversed screen

The W500 M watch is well built with solid buttons and a design that protects the watch face from scratches with a raised edge around the screen. As someone who regularly suffers from eye strain, the reversed LCD screen means the background is reflects less light and easier to read the time, especially in low light situations.

display is useless

Buy the version without reversed display. This version is useless in ambient light, which makes using the stopwatch function tedious - because using the backlight also changed the function.

Hello Clive,

Thank you for taking the time to write a review on this watch.

If you have the receipt, I invite you to visit your local branch to exchange your watch for the W500 with the preferred screen.


this is the best watch I ever bought THANX


To replace another watch

After my last Kalenji watch strap broke, with no way to replace an all-in-one bought this together with an extra strap for later.

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H Clive,

Thanks for your feedback, hope it is working well for you!


Joe Rainsford
Athletics Expert
Decathlon Giltbrook
Great watch

Great watch.. looks cool with clear digits and backlighting for darkness.. Simple intuitive controls.. Useful timer and alarm plus chrono features.. highly recommended

Hi Robert,

Thanks for your detailed review of the W500 stopwatch, great to hear you are enjoying it!

Joe Rainsford
Athletics Expert
Decathlon Giltbrook
Great functions for the price, but...

This watch has been awesome to time runs, set timers and alarms and is really easy to get the hang of! I agree with others that after a quick play and some intuition, you won't even need the instructions, but they're clear enough if you do get stuck at all, and the display is very good too! The only reason this isn't 5 stars is the strap. It's a hard plastic that takes some getting used to, and if worn for extended periods can become a bit irritating to the skin. If it was made from a slightly softer material, this would be the perfect watch! Don't let that put you off though, for the price I firmly believe you can't get much better than this lovely piece of kit, just take it off before bed and you'll be all good!

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Additional Product Information


Wristband: 80.0% Thermoplastic polyurethane, 20.0% Stainless Steel ; Frame: 90.0% Polycarbonate - Acrylonitrile Butadiene Styrene, 10.0% Polymethyl Methacrylate ; Deck: 70.0% Epoxy Resin (EP), 30.0% Copper

Time your runs

Time your performances with a stopwatch that's accurate to 1/100th second

Improve your performance with the interval training function

Configure a simple interval training session with 4 separate times with the interval mode. For example:Time 1: 15-minute warm-upTime 2: 30 seconds actionTime 3: 30 seconds restRepetition: 10 timesTime 4: 10 minutes for slowing down

Your watch is waterproof to 5 atm

Keep your watch on as you swim along the surface or have a shower after your exertions, it's waterproofed to 5 ATM and has buttons that work underwater.

Ever heard of the swip system ?

It's easy to change your watch strap without tools thanks to the SWIP fastening system! Just slide the strap on or off.With a secure and resistant system provided by the wave-shaped design.The optional Strap M bracelet (or Swip Strap) is compatible with the following models: W500M Swip, W500+M Swip, W700XC M Swip, A300M Swip, A300+M Swip, Swip Digital M, Swip Analog M and X-Cross 400M.

Product testing

Decathlon teams have been designing watches specifically for sports use for 20 years.During development, each model undergoes more than 30 different tests in the laboratory, as well as some tests in the field conducted by our teams of testers.


Availability of the parts (battery and wristband) needed to use the product: 2 years



Superior quality. Unbeatable prices.

For 40 years, Decathlon has delivered the best value in the retail sports industry by offering high-quality, sustainable and cost-effective products.

Decathlon makes the difference
  1. product-research

    Research and development

    delivers high-quality cost-effective products

  2. State-of-the-art production processes

    minimize manufacturing costs

  3. Optimized supply chain

    reduces retail prices

  4. laptop-checkout

    Minimal retail footprint

    lowers overhead and indirect costs


Size Guide Visual