Casio WS-2100 — With Step Tracker for Walkers and Runners

Rating: 3 out of 5.
Size★★★
Weight★★★
Functions★★★★★
Battery Years★★★
Price★★★
How did we compose this rating? Enjoy our calculations →

About WS-2100 in Short. The multifunctional step tracker includes 200-lap memory to record your progress, and the 100-meter water resistance has your back even in sudden downpours. LED lighting ensures easy reading during evening workouts. Plus 5 alarms, countdown timer, 1/100-second stopwatch, calendar, and more!


General Information

Price$40  *average Amazon Price, we may earn commission from purchases
Year of First Release2021
Model RangeCasio Digital Collection
Battery Type CR2025 (Casio Batteries)
Manual3466 (official)

WS-2100 Model Range *may be updated

*Want to be the first to know about new Collection Updates? Here we store all recent Monthly Collection Updates →


Other Casio Digital WS Watches *similar by price and functions but different by cases

These are not all Casio Digital WS Series. Here is a list of All Casio Digital WS Watches →


Casio WS-2100 on the wrist!


Casio WS-2100 Display Guide *for key functions only. For you to know how it works))

General Display

  1. Displayed while a split time is displayed
  2. Displayed while the hourly time signal is enabled
  3. Displayed while an alarm is turned on
  4. Appears when the displayed time is a p.m. time
  5. Displayed while a lap time is displayed
  6. Indicate whether or not the step count is being incremented
  7. Graphic display area operation is linked with operations in each watch mode
  8. Displayed while the button operation tone is disabled
  9. Displayed while the watch is in the Recall Mode
  10. Displayed while the step count is displayed.

Displaying the Step Count

  1. Enter the Timekeeping Mode.
  2. Use E to display the step count.

Measuring a Split or Lap Time

  1. Select the information you want to display.
  2. Use the operations below to measure elapsed time.
    – Each press of E displays the time elapsed from the start of the event up to that point (split time) and the elapsed time for a specific segment of the event (lap time).
  3. Press E to reset the stopwatch to all zeros.

Using the Timer

  • The watch beeps for 10 seconds when the end of the countdown is reached.
  • To stop a countdown operation, first pause it and then press E. This will reset the timer to its start time.
  • D – Start / Pause / Resume

Dual Time

  1. Enter the Dual Time Mode.
  2. Hold down E for at least two seconds. This swaps your current location time and Dual Time.

Official Casio Description. Attention, walkers and runners! How serious are you about fitness? Optimize your daily workouts with precision tracking and full-on functionality.
The multifunctional step tracker includes 200-lap memory to record your progress, and the 100-meter water resistance has your back even in sudden downpours. LED lighting ensures easy reading during evening workouts. Plus 5 alarms, countdown timer, 1/100-second stopwatch, calendar, and more!


Official WS-2100 Specs / Features *for base version WS-2100

  • Case / bezel material: Resin
  • Resin Band
  • Resin Glass
  • 100-meter water resistance
  • LED light
    Selectable illumination duration (1.5 seconds or 3 seconds), afterglow
  • Step count using a 3-axis acceleration sensor: 0 to 999,999 step count display range
    Step Count History Display: Daily data (8 days)
    Step Goal Progress Display (step count goal setting range: 1,000 to 50,000, 1,000-step increments)
    Step Count Graph: Hourly step count for the past 7 hours on a 6-level graph
    Step indicator
    Power Saving: Auto sensor sleep state entry after fixed period of non-activity
  • Dual time (Home time swapping)
  • 1/100-second stopwatch
    Measuring capacity:
    00’00”00~59’59”99 (for the first 60 minutes)
    1:00’00~23:59’59 (after 60 minutes)
    Measuring unit:
    1/100 second (for the first 60 minutes)
    1 second (after 60 minutes)
    Measuring modes: Elapsed time, lap/split times, 1st-2nd place times
    Memory capacity: Up to 200 records (measurement start month, date, hour, minute, lap/split times)
  • Countdown timer
    Measuring unit: 1 second
    Countdown range: 60 minutes
    Countdown start time setting range: 1 second to 60 minutes (1-second increments and 1-minute increments)
  • 5 daily alarms
  • Hourly time signal
  • Full auto-calendar (to year 2099)
  • 12/24-hour format
  • Button operation tone on/off
  • Regular timekeeping: Hour, minute, second, pm, year, month, date, day
  • Accuracy: ±30 seconds per month
  • Approx. battery life: 3 years on CR2025
  • Size of case : 49.9×48.1×14.6mm
  • Total weight : 47g

You ask, we answer…

What does 100-meter water resistance in WS-2100 mean?

The watch is good for swimming but not for deep diving.

What does Step count in WS-2100 do?

0 to 999,999 step count display range
Step Count History Display: Daily data (8 days).

What does Stopwatch in WS-2100 do?

Measuring capacity:
00’00”00~59’59”99 (for the first 60 minutes)
1:00’00~23:59’59 (after 60 minutes).