About
Last updated: 2026-06-25
Outdoor Guide is a comprehensive hub that gathers info and free calculators for four outdoor activities: fishing, hiking, cycling and tennis.
All calculations run in your browser, and we provide them transparently based on official sources and standard formulas.
What is Outdoor Guide
Outdoor Guide is a free collection of tools and information that helps fishing, hiking, cycling and tennis enthusiasts check what they need to know before heading out, quickly and accurately. It provides the essential calculations for outdoor activity — feels-like temperature, tides, exercise calories burned — together with their formulas so anyone can understand them.
| Activity | Tool | Description |
|---|---|---|
| Shared | Feels-like temperature calculator | Judges suitability via wind chill and heat index |
| Fishing | Tide calculator | Check the tide and current strength by lunar date |
| Hiking | Hiking calorie calculator | Estimate calories from distance and elevation |
| Cycling | Cycling calorie calculator | Average speed and calories from distance and time |
| Tennis | Tennis scoreboard & NTRP | Scoring, rules and level self-assessment |
Editorial principles (E-E-A-T)
- Experience — We break results down by item based on real outdoor situations (weather, tides, energy expenditure).
- Expertise — We calculate using verified standard formulas such as wind chill, heat index, MET metabolic equivalents and lunar-based tide cycles.
- Authoritativeness — We present the standards and source links of official agencies such as national weather and hydrographic services.
- Trustworthiness — We disclose the formulas openly and clearly flag estimated values. We do not collect or store your inputs.
Data sources
The formulas and standards used in each tool are based on the following official sources. Standards may change, and we update to the latest values when they do.
- Korea Meteorological Administration — feels-like temperature (wind chill, heat index), weather and wind forecasts
- Korea Hydrographic and Oceanographic Agency — tide and water-level forecasts
- Korea Sports Promotion Foundation — exercise intensity (MET) and health info reference
A note on accuracy
All Outdoor Guide results are reference estimates based on your inputs and published standard formulas. In particular, calories burned can vary by about ±20% between individuals, and tides and feels-like temperatures can differ with actual weather and ocean conditions. For safety-critical decisions, please confirm with official agencies such as your national weather and hydrographic services.
Contact
Send suggestions or error reports to jin@zerolabskorea.com. For how we handle data, see the Privacy Policy.
Last updated: 2026-06-25