EasyTimer

30s work / 15s rest - 5 rounds

3m 48s total including 3s prepare

Interval Timer

This interval timer lets you build a session from work, rest, rounds, and a prepare countdown, then share that exact setup by link. Choose one of six presets or customize the values: work can be 5–600 seconds, rest 0–600 seconds, rounds 1–50, and prepare 0–30 seconds. The total includes a rest period after every round, including the last.

Choose a preset and estimate the session time

  • ✓Quick HIIT — 30s work / 15s rest × 5, with 3s prepare, 3:48 total. A short warm-up with brief efforts, recovery and a low time commitment at home.
  • ✓Tabata — 20s work / 10s rest × 8, with 3s prepare, 4:03 total. A familiar short-cycle format for focused bursts during a compact workout with minimal equipment.
  • ✓Beginner HIIT — 30s work / 60s rest × 6, with 10s prepare, 9:10 total. Longer recovery gives time to reset and prepare for the next effort before trying faster intervals.
  • ✓Balanced circuit — 30s work / 30s rest × 10, with 5s prepare, 10:05 total. Equal intervals suit timed station circuits with consistent changeovers for groups or solo training.
  • ✓Power intervals — 40s work / 20s rest × 8, with 5s prepare, 8:05 total. Longer efforts suit a brisk pace with consistent recovery between rounds and clear structure.
  • ✓Mobility stretch — 45s work / 15s rest × 6, with 3s prepare, 6:03 total. Longer holds suit controlled movements with brief transitions between positions after strength work.

How it works

  1. 1

    Choose a preset or set your values

    Pick one of the six named presets, or configure work, rest, rounds, and prepare within the allowed ranges. Work must be at least 5 seconds; rest and prepare can be zero.

  2. 2

    Estimate the session and share it

    Calculate total time as prepare + rounds × (work + rest); this includes the final rest. Set or apply your values, open the Share panel, then copy its generated link with the work, rest, rounds, and prepare parameters to share the same setup.

Frequently Asked Questions

Which preset should I choose for my session?

Quick HIIT is a short 30/15 set; Beginner HIIT gives each 30-second effort a 60-second recovery; Balanced circuit uses equal 30-second work and rest; Power intervals uses 40/20; Mobility stretch uses 45/15; and Tabata uses 20/10 for eight rounds. Each preset also has a prepare countdown. Choose by the time you need for each effort, recovery, and transition.

How do I calculate the total session time?

Use prepare + rounds × (work + rest). For example, 30 seconds work, 15 seconds rest, 5 rounds, and 3 seconds prepare totals 3 minutes 48 seconds. The calculation includes the rest after the last round. Add work and rest first, multiply that round length by the number of rounds, then add prepare.

Does the timer include rest after the final round?

Yes. Each round is followed by its rest period, including the final round, so the total duration is prepare + rounds × (work + rest). A rest value of zero removes those pauses.

How can I share a custom setup?

Set or apply the values, open the Share panel, and copy its generated link. The link carries work, rest, rounds, and prepare parameters, so opening it restores the same setup. For example, ?work=45&rest=15&rounds=6&prepare=3 describes a 45-second effort, 15-second rest, six rounds, and a 3-second prepare countdown.

What values can I configure?

Work can be 5–600 seconds, rest 0–600 seconds, rounds 1–50, and prepare 0–30 seconds. Values are whole seconds.

What happens if I set rest to zero?

The timer skips rest phases and moves directly between work rounds. The total becomes prepare + rounds × work.

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