Journey Inputs
White themeRoute Segments
Build a journey from multiple segments. You can also load ready made route presets from the sidebar.
| # | Name | Region preset | Distance (km) | Terrain | Mode |
|---|
Results
Total distance (km)
—
Sum of segments or fallback distance.
Travel days
—
Weighted by terrain mode rest and weather.
Effective speed (km/day)
—
Total distance divided by days.
Risk score (0–100)
—
Aggregated from segment risks.
Success chance (%)
—
100 − risk heuristic.
Segments
—
Multi leg journeys supported.
Food rations (kg)
—
0.75 kg per person per day.
Water (litres)
—
3 L per person per day.
| # | Time | Segs | Total km | Days | Risk | Party | Rations (kg) |
|---|
Formula used
These are pragmatic fantasy approximations for planning and storytelling.
- Base speed by mode: foot 24, pony 30, horse 48, boat 70, eagle 300 (km/day).
- Terrain modifier: plains 1.00, forest 0.85, hills 0.80, mountains 0.60, marsh 0.50.
- Encumbrance modifier: \( m_{enc}=\max(0.5,\;1-\frac{\max(0,w-10)}{40}) \).
- Rest modifier: \( m_{rest}=\mathrm{clamp}(0.5,1.5,\frac{24-r}{16}) \).
- Weather modifier: fair 1.00, rain 0.90, storm/snow 0.75.
- Single segment speed: \( v_i = v_0(mode)\cdot m_{terrain}(i)\cdot m_{enc}\cdot m_{rest}\cdot m_{weather} \).
- Segment days: \( d_i = \frac{\text{distance}_i}{v_i} \); Total days \( D=\sum_i d_i \).
- Risk aggregate: \( R=\min\big(100,\;K \cdot \sum_i r_t(i)\sqrt{d_i}\big) \) where \(K=10\cdot h \cdot w_r \cdot (0.7+0.3p)\cdot (1-\frac{s}{15})\).
- Supplies: rations = \(0.75\cdot\) party × D (kg); water = \(3\cdot\) party × D (L).
Adjust tables in code to suit your rulings.
How to use this calculator
- Add one or more segments below or load a route preset from the sidebar.
- Set party size encumbrance rest weather hostility and stealth.
- Click Calculate to compute total distance days risk supplies and success chance.
- Each run is saved in the history table which you can export to CSV or PDF.
- If no segments exist the fallback distance field is used for a single leg estimate.
Example data table
Fictional illustrative distances for comparisons.
| Route | Distance (km) | Terrain | Mode | Days est. | Risk |
|---|---|---|---|---|---|
| Hobbiton → Bree | 200 | plains | foot | ~9 | 30 |
| Rivendell → Moria | 480 | mountains | foot | ~33 | 70 |
| Lórien → Rohan | 420 | plains | horse | ~9 | 40 |
| Minas Tirith → Mordor | 350 | hills | foot | ~18 | 80 |
| Emyn Muil → Anduin | 120 | marsh | boat | ~3 | 55 |
Route presets
Load multi-segment examples. Distances are approximate fan values.
Region presets
Use in the segment table to auto fill typical terrain and mode. You can still override any field.
- Shire: plains · foot or pony
- Old Forest / Fangorn: forest · foot
- Misty Mountains / Mordor: mountains or hills · foot
- Rohan: plains · horse
- Anduin River: marsh/river · boat
- Dead Marshes: marsh · foot
- Gondor: hills · foot or horse
FAQs
They are pragmatic approximations for gaming and planning. Adjust values in the code to match your preferred references or table rulings.
Kilometres for distance km/day for speed kilograms for rations litres for water. You can switch labels to miles and gallons.
Each segment contributes terrain risk scaled by the square root of days for that leg. We sum those contributions and apply global factors for weather hostility encumbrance and stealth.
Yes. Each segment may specify its own travel mode which affects speed for that leg. Global encumbrance rest and weather apply to all legs.
To keep inputs fast weather is global. Duplicate a journey and tweak weather if you want variants. You may also extend the code to add weather per segment.
Use CSV and PDF buttons. Export includes high level totals per run. Extend the code to add a detailed segment table to PDF if you prefer.
Notes
This tool is an independent fan utility and is not affiliated with or endorsed by any rights holder.