3-hour marathon pace

A 3-hour marathon is 6:52 per mile, or 4:16 per kilometre, held for 26.2 miles (42.195 km). On even pace you pass halfway at 1:30:00 and 20 miles at 2:17:18. To finish under 3:00, run 6:51 per mile, which finishes in 2:59:36.

How the numbers are worked out

• 3:00:00 is 10,800 seconds.
• Per mile: 10,800 ÷ 26.2188 miles = 411.9 s = 6:52.
• Per kilometre: 10,800 ÷ 42.195 km = 256.0 s = 4:16.
• At halfway: 10,800 × 21.0975 ÷ 42.195 = 5,400.0 s = 1:30:00.
• At 20 miles: 10,800 × 20 ÷ 26.2188 = 8,238.4 s = 2:17:18.
• At 40 km: 10,800 × 40 ÷ 42.195 = 10,238.2 s = 2:50:38.
• Speed: 26.2188 miles ÷ 3 h = 8.74 mph (14.06 km/h).

Every split on this page uses one formula: goal seconds × distance covered ÷ race distance, rounded to the nearest second. A mile is 1.609344 km, so the marathon is 26.2188 miles. The marathon pace chart applies the same formula to every realistic finish time.

RunRepeat's finish-time percentiles (35M results across 28,000+ races, as printed on our average marathon time page) place 3:00:00 between the fastest 1% (2:50:48) and the fastest 10% (3:31:46) of all finishers. For men it sits between the fastest 1% (2:44:18) and the fastest 10% (3:22:40); for women, faster than the 3:11:35 that marks the fastest 1%.

Read the other way: a sub-3 beats more than 90% of all finishers in that data, and a woman running 3:00 is faster than the 3:11:35 that marks the fastest 1% of women.

3:00:00 is also the Boston Marathon qualifying standard for men aged 35 to 39, for both the 2027 and 2028 races. Meeting it is not enough on its own: the 2027 cut-off was 5:17, so those runners needed 2:54:43 or faster to be accepted. Details on our Boston qualifying times page.

At Chicago, 3:00:00 is the standard for men aged 40 to 44, and because Chicago runs no cut-off, a verified time inside it guarantees entry (Chicago Marathon qualifying times).

Check the goal before you train for it. Riegel's formula, T2 = T1 × (D2 ÷ D1)^1.06 (Riegel, American Scientist 69(3), 1981), says 3:00:00 for the marathon is worth:

• Half marathon: 10,800 × (21.0975 ÷ 42.195)^1.06 = 5,180 s = 1:26:20.
• 10K: 10,800 × (10 ÷ 42.195)^1.06 = 2,348 s = 39:08.

Riegel is optimistic when it predicts a marathon from a shorter race. Treat a recent half marathon near 1:26 as the minimum evidence for sub-3, not proof. Run your own recent result through the race time predictor, and use the VDOT calculator to turn it into training paces.

Then pick a plan. Sub-3 is the advanced end of the marathon: it asks for an established base and two quality sessions a week, which is what the advanced level assumes. The free 16-week advanced marathon plan is 5 runs a week with two quality sessions, peaking at 86 km with a 35 km long run, with cutback weeks and a taper. Build sustained sections at 6:52 per mile into the long runs, so race pace is familiar before race day. If sub-3 is a stretch this cycle, 3:30 marathon pace is 8:01 per mile.