Pomodoro Timer
This Pomodoro Timer calculator estimates focused minutes, total elapsed time including short and long breaks, and the percentage of time spent actively focusing. It supports multiple commonly used methods and a fully custom mode.
Use the presets for quick planning or switch to Custom to match workplace policies or personal pacing. Results are estimates intended for planning and time‑management; follow your organization and health guidance for break schedules and ergonomic practice.
Governance
Record 80da1c3d4c94 • Reviewed by Fidamen Standards Committee
Classic Pomodoro pattern: 25 minutes focus, 5 minutes short break, long break after each 4 cycles.
Inputs
Results
Total focused minutes
100
Total elapsed minutes (including breaks)
135
Focus share (%)
7407.41%
| Output | Value | Unit |
|---|---|---|
| Total focused minutes | 100 | minutes |
| Total elapsed minutes (including breaks) | 135 | minutes |
| Focus share (%) | 7407.41% | % |
Visualization
Methodology
Calculations multiply work blocks by cycle counts and include short break durations after each work block. Long breaks are included based on cycles_before_long; when total cycles is not an exact multiple, the tool prorates the long break estimate rather than applying rounding to keep the estimate transparent.
This tool emphasizes traceability and reproducibility: inputs are explicit, formulas are simple arithmetic, and assumptions are documented. For synchronization accuracy across devices, follow authoritative timekeeping and system synchronization guidance (see citations). For workplace break policy and ergonomic recommendations, consult applicable occupational safety standards.
Worked examples
Standard (25/5): 4 cycles, 1 session → Focus = 25 * 4 = 100 minutes; Elapsed ≈ (25+5)*4 + 15*1 = 120 + 15 = 135 minutes; Focus share ≈ 74.1%.
Long Focus (50/10): 3 cycles, 1 session → Focus = 50 * 3 = 150 minutes; Elapsed = (50+10)*3 + 30*(3/2) = 180 + 45 = 225 minutes; Focus share = 66.7% (long breaks prorated when not integer multiples).
F.A.Q.
Should I sync timers across devices?
Yes. For consistent timekeeping use operating system time synchronization (Network Time Protocol) or follow instrument timekeeping guidance. Poorly synced clocks can cause drift in scheduled timers.
Are the long break counts rounded?
This calculator prorates long breaks when cycles are not an exact multiple of cycles before a long break to keep the estimate transparent. If you prefer integer long breaks, adjust total_cycles to fit or manually round the estimated long break count.
Is this medical or occupational-health advice?
No. This tool provides time-management estimates only. For medical, neurological, or occupational health recommendations (including required rest breaks), consult a qualified professional or your workplace safety officer and refer to relevant standards.
How accurate are these estimates?
Estimates are arithmetic and deterministic based on inputs. They do not account for variability such as task switching, setup time between blocks, or interruptions. Use them as planning aids and verify against real usage logs for calibration.
Sources & citations
- National Institute of Standards and Technology (NIST) — https://www.nist.gov
- International Organization for Standardization (ISO) — https://www.iso.org
- Institute of Electrical and Electronics Engineers (IEEE) — https://www.ieee.org
- Occupational Safety and Health Administration (OSHA) — https://www.osha.gov
- NIST — Time and Frequency Division — https://www.nist.gov/pml/time-and-frequency-division
- ISO 8601 — Date and Time Format Standard — https://www.iso.org/iso-8601-date-and-time-format.html
Further resources
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
Record ID: 80da1c3d4c94What changed (latest)
v1.0.0 • 2025-11-11 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Versioning & Change Control
Audit record (versions, QA runs, reviewer sign-off, and evidence).
What changed (latest)
v1.0.0 • 2025-11-11 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Public QA status
PASS — golden 25 + edge 120
Last run: 2026-01-23 • Run: golden-edge-2026-01-23
Engine
v1.0.0
Data
Baseline (no external datasets)
Content
v1.0.0
UI
v1.0.0
Governance
Last updated: Nov 11, 2025
Reviewed by: Fidamen Standards Committee (Review board)
Credentials: Internal QA
Risk level: low
Reviewer profile (entity)
Fidamen Standards Committee
Review board
Internal QA
Entity ID: https://fidamen.com/reviewers/fidamen-standards-committee#person
Semantic versioning
- MAJOR: Calculation outputs can change for the same inputs (formula, rounding policy, assumptions).
- MINOR: New features or fields that do not change existing outputs for the same inputs.
- PATCH: Bug fixes, copy edits, or accessibility changes that do not change intended outputs except for previously incorrect cases.
Review protocol
- Verify formulas and unit definitions against primary standards or datasets.
- Run golden-case regression suite and edge-case suite.
- Record reviewer sign-off with credentials and scope.
- Document assumptions, limitations, and jurisdiction applicability.
Assumptions & limitations
- Uses exact unit definitions from the Fidamen conversion library.
- Internal calculations use double precision; display rounding follows the unit's configured decimal places.
- Not a substitute for calibrated instruments in regulated contexts.
- Jurisdiction-specific rules may require official guidance.
Change log
v1.0.0 • 2025-11-11 • MINOR
Initial publication and governance baseline.
Why: Published with reviewed formulas, unit definitions, and UX controls.
Areas: engine, content, ui • Reviewer: Fidamen Standards Committee • Entry ID: ee7614f5578f