Presets and sharing
Inputs
Tidal events (up to 6 events)
| Type | Time (HH:MM) | Tide level (m) | Delete |
|---|
Tidal events are automatically sorted and displayed in chronological order.
Data acquisition (β)
Data acquisition (β) is regionally limited. If you cannot obtain it, please enter it manually.
Results
sunrise/sunset
- sunrise
- —
- sunset
- —
- photoperiod
- —
- condition
- —
Moon age/moon phase
- Moon phase
- —
- moon phase
- —
- Illuminance (approximate)
- —
Moon age/moon phase is estimated using the average lunar model.
Astronomy tools
Find related tools for sunrise, twilight, moon phase, and observing planning.
Tide (manual input)
| Type | time | Tide level (m) |
|---|
- Maximum tide level
- —
- minimum tide level
- —
- Tidal difference (maximum-minimum)
- —
The curve is not displayed because there are fewer than 2 tidal events.
Assumptions & limits
- Moon age/moon phase/illuminance are approximate estimates based on a simple model (lunar month 29.530588853 days).
- The tidal curve is a simple display that connects the extreme values of high tide and low tide using cosine interpolation.
- Actual tidal values vary depending on wind, atmospheric pressure, topography, river inflow, etc. Please be sure to check the official information.
FAQ
Are the tide values accurate?
Since it is based on manual input or external forecast data, there may be differences from the actual tide level. Please be sure to follow official information and local warnings when making your final decision.
Why is the moon age different from other sites?
This tool uses a simple model. There may be differences from strict astronomical calculations.
What if data acquisition (β) cannot be used?
It may not be possible to obtain it due to regional restrictions or API restrictions. Please use the manual input mode by entering tidal events.
How to use Tide/moon phase/sunrise/sunset calculation effectively
What this calculator does
This page is for estimating outcomes by changing inputs in one controlled workflow. The model keeps your focus on variables, not output shape. Start with stable assumptions, then test sensitivity by changing one key input at a time to observe directional impact.
Input meaning and unit policy
Each input has an expected unit and a typical range. For reliable interpretation, check whether you are using the same unit system, period, and base assumptions across all runs. Unit mismatch is the most common source of unexpected drift in numeric results.
Use-case sequence
A practical sequence is: first run with defaults, then create a baseline log, then run one alternative scenario, and finally compare only the changed output metric. This sequence reduces cognitive load and prevents false pattern recognition in early experiments.
Common mistakes to avoid
Avoid changing too many variables at once, mixing incompatible data sources, and interpreting a one-time output without checking robustness. A single contradictory input can flip conclusions, so keep each experiment minimal and document assumptions as part of your note.
Interpretation guidance
Review both magnitude and direction. Direction tells you whether a strategy moves outcomes in the desired direction, while magnitude helps you judge practicality. If both agree, you can proceed; if not, rebuild the baseline and verify constraints before deciding.
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