Geocaching D/T Score Calculator
Combine a cache's difficulty and terrain stars into a single planning score and read what the pairing means for your day out.
How it works
Combined score = difficulty + terrain · Product = difficulty × terrain (1.0–25.0)
Every geocache carries two half-star ratings from 1 to 5: difficulty (how hard the container is to find and open) and terrain (how hard the location is to reach). Summing them gives a quick 2–10 planning score, while the product spreads caches across the 81-cell "D/T grid" that hobbyists try to fill. A 5-star terrain almost always signals special equipment — a boat, climbing gear or scuba — so it is flagged separately.
Worked example
A cache rated difficulty 2.5 and terrain 3 sums to 5.5 (moderate) with a product of 7.5. Neither axis hits 5, so no special equipment is flagged — a reasonable half-day find.
Frequently asked questions
What do difficulty and terrain mean?
Difficulty measures the mental challenge — how well-hidden or tricky the container is. Terrain measures the physical challenge of reaching the spot, from a roadside 1-star to a 5-star that needs a boat or climbing gear.
What is the D/T grid?
A 9×9 matrix of every half-star difficulty/terrain combination — 81 cells. Many geocachers aim to log a find in every cell, which is why the difficulty and terrain product is worth tracking.
When do I need special equipment?
A terrain rating of 5 by definition requires specialized gear such as scuba, a boat, or rope work. This tool flags any 5-star axis so you can pack accordingly before you set out.
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This calculator is for educational purposes. Double-check important results before acting on them.