One Does Not Simply...
Boromir was right, but he didn't show his work. The actual distance from Bag End in Hobbiton to the Crack of Doom in Mordor — measured along the Fellowship's path through Rivendell, Moria, Lothlórien, the Anduin, the Emyn Muil, and the Plateau of Gorgoroth — is 1,779 miles. The Fellowship made it in about 6 months on screen and ~6 months in the book (March 25 destruction of the Ring vs September 22 departure from Bag End).
This calculator estimates how long *you'd* take, given your daily hiking pace and hostile-terrain slowdown.
How to Use This Calculator
Daily hiking distance. A fit hiker on flat trail manages 15–25 miles/day. The Fellowship averaged ~10 miles/day across all terrain. Default: 12.
Terrain difficulty. A multiplier applied to your speed. Pleasant Shire roads: 1.0. Mixed forest + hills (most of the journey): 0.75. Mordor's plateau: 0.4.
Detour for Nazgûl. Adds 5–25% extra distance dodging Black Riders and Orcs. Default 15%.
The Formula
effective miles per day = daily distance × terrain multiplier
total adjusted distance = 1779 × (1 + nazgul detour)
days needed = total / effective per day
At default values (12 mi/day × 0.75 terrain × 15% detour): ~227 days, or about 7.5 months. The Fellowship did it in ~6.
Frequently Asked Questions
How far is it actually from the Shire to Mount Doom?
Karen Wynn Fonstad's Atlas of Middle-earth measures the Fellowship's path at 1,779 miles. As-the-eagle-flies, it's closer to 1,500.
Why don't the eagles just fly the Ring?
Tolkien addressed this in letters: the eagles aren't air taxis, Sauron would see them, and the journey was as much about Frodo proving the Ring couldn't be wielded as it was about geography.
How long did the Fellowship actually take?
Per Tolkien's appendix B, Frodo left Bag End on September 23, 3018 and the Ring was destroyed on March 25, 3019. About 184 days.
Could a marathoner make it faster?
A 30 mi/day pace with no terrain penalty would do it in about 60 days. Realistically, no one's doing 30 mi/day for 2 months over hostile terrain without a Walmart in sight.