What pace is a 4-hour marathon?

A 4-hour marathon requires 9:09/mi (5:41/km). The arithmetic: 240 minutes ÷ 26.219 miles = 9.154 min/mi, which rounds to 9:09/mi. In metric: 240 ÷ 42.195 = 5.687 min/km → 5:41/km. That translates to 10.55 km/h (6.55 mph) — roughly the speed of a brisk cycling commute.

What is a good marathon time for a beginner?

4:30 to 5:00 is a common finish range for first-time marathon runners, based on RunRepeat's global finishing data (2023). At 4:30, the required pace is 10:18/mi (6:24/km); at 5:00 it is 11:26/mi (7:06/km). Most first-timers benefit from setting a time based on recent long-run averages rather than an aspirational target — use the race-time predictor to translate a half marathon result into a realistic marathon goal.

Should I use negative splits for my marathon?

For most runners, yes. Santos-Lozano et al. (2014) analyzed marathon finish data and found that runners who ran even or slightly negative splits outperformed those who went out fast. A 2–4% negative split — meaning your second half is 2–4% faster than your first — conserves glycogen through the wall zone. Use the Negative Split % field in this calculator to generate a split table matching that strategy.

How do I avoid hitting the wall in a marathon?

Hitting the wall — the glycogen depletion phase typically at miles 18–22 — is best avoided through three measures: even or negative pacing in the first half, fueling with 30–60 g of carbohydrate every 30–45 minutes from mile 6 onward, and building adequate long-run mileage in training (at least two runs over 20 miles in a 16–20 week block). The wall zone is highlighted in this calculator's mile-by-mile split panel.

What is the average marathon finish time?

The global average marathon finish time is approximately 4:21 for male runners and 4:48 for female runners, based on RunRepeat's 2023 aggregate analysis across major and regional races. Times vary significantly by age group, course elevation, and weather. For context, finishing at 4:00 places a runner in roughly the top 35–40% globally.

How many miles is a marathon exactly?

A marathon is exactly 26.21875 miles (42.195 km) under IAAF standards. The distance dates to the 1908 London Olympics, where the course was extended to 26 miles and 385 yards so the race could finish in front of the royal box at Windsor Castle. GPS devices often record 26.3–26.5 mi due to weaving on the course — plan your race by the clock, not by GPS distance.

What pace do I need to qualify for Boston?

Boston qualifying times depend on your age and sex — see the qualifying standards table on this page for common brackets. As a reference point, a 3:00 marathon (the standard for men 18–34) requires 6:52/mi (4:16/km). Standards change each registration cycle; always verify the current standard on the Boston Athletic Association website before committing to a training goal.

Can I walk part of a marathon and still finish?

Yes. The Galloway run/walk method — alternating running intervals with walking breaks — allows many runners to complete a marathon who could not sustain continuous running. The required overall pace is the same regardless of run/walk ratio: enter your goal finish time in this calculator to find the combined pace you need. Most race events allow up to 6–7 hours, but check your specific event's cutoff.

Marathon Pace Calculator

Turn your marathon goal time into pace per mile and km, plus a full mile-by-mile split table with even or negative split strategies.

Goal time

Split strategy

Required pace

9:09/mi

(5:41 /km)

Recreational

Recreational marathon pace at 9:09 (5:41).

Finish time

4:00:00

Speed

6.6mph

10.5 km/h

Half split

2:00:00

Per-5K split

28:26

Milestone splits

Milestone	Distance	Cumulative
5K	5	0:28:26
10K	10	0:56:52
Half marathon	21.098	2:00:00
30K	30	2:50:38

Mile-by-mile splits

Mile	Split time	Cumulative	Pace
1	9:09	0:09:09	9:09
2	9:09	0:18:18	9:09
3	9:09	0:27:27	9:09
4	9:09	0:36:36	9:09
5	9:09	0:45:46	9:09
6	9:09	0:54:55	9:09
7	9:09	1:04:04	9:09
8	9:09	1:13:13	9:09
9	9:09	1:22:23	9:09
10	9:09	1:31:32	9:09
11	9:09	1:40:41	9:09
12	9:09	1:49:50	9:09
13	9:09	1:58:59	9:09
14	9:09	2:08:09	9:09
15	9:09	2:17:18	9:09
16	9:09	2:26:27	9:09
17	9:09	2:35:36	9:09
18	9:09	2:44:46	9:09
19	9:09	2:53:55	9:09
20	9:09	3:03:04	9:09
21	9:09	3:12:13	9:09
22	9:09	3:21:22	9:09
23	9:09	3:30:32	9:09
24	9:09	3:39:41	9:09
25	9:09	3:48:50	9:09
26	9:09	3:57:59	9:09
26.22	2:00	3:59:59	9:09

Standard marathon nutrition: fuel every 5 km / 3.1 mi.

Per-km splits

Mile	Split time	Cumulative	Pace
1	5:41	0:05:41	5:41
2	5:41	0:11:22	5:41
3	5:41	0:17:03	5:41
4	5:41	0:22:45	5:41
5	5:41	0:28:26	5:41
6	5:41	0:34:07	5:41
7	5:41	0:39:48	5:41
8	5:41	0:45:30	5:41
9	5:41	0:51:11	5:41
10	5:41	0:56:52	5:41
11	5:41	1:02:33	5:41
12	5:41	1:08:15	5:41
13	5:41	1:13:56	5:41
14	5:41	1:19:37	5:41
15	5:41	1:25:19	5:41
16	5:41	1:31:00	5:41
17	5:41	1:36:41	5:41
18	5:41	1:42:22	5:41
19	5:41	1:48:04	5:41
20	5:41	1:53:45	5:41
21	5:41	1:59:26	5:41
22	5:41	2:05:07	5:41
23	5:41	2:10:49	5:41
24	5:41	2:16:30	5:41
25	5:41	2:22:11	5:41
26	5:41	2:27:53	5:41
27	5:41	2:33:34	5:41
28	5:41	2:39:15	5:41
29	5:41	2:44:56	5:41
30	5:41	2:50:38	5:41
31	5:41	2:56:19	5:41
32	5:41	3:02:00	5:41
33	5:41	3:07:41	5:41
34	5:41	3:13:23	5:41
35	5:41	3:19:04	5:41
36	5:41	3:24:45	5:41
37	5:41	3:30:27	5:41
38	5:41	3:36:08	5:41
39	5:41	3:41:49	5:41
40	5:41	3:47:30	5:41
41	5:41	3:53:12	5:41
42	5:41	3:58:53	5:41
42.195	1:06	4:00:00	5:41

Marathon pace is the per-mile or per-kilometer speed you need to hold for the full 42.195 km (26.219 mi) to cross the finish line at your goal time. This calculator converts any goal time into your required pace, shows your speed in mph and km/h, and generates a mile-by-mile split table — with even splits or a customizable negative-split strategy. Miles 18–22 are highlighted as the wall zone, where glycogen depletion typically peaks. Use the split table to write your race plan, then check the goal-time lookup below for quick reference across common finish times.

pace = goal_time ÷ distance

pace: = Required pace (min/mi or min/km)
goal_time: = Target marathon finish time (in minutes)
distance: = Marathon distance — 26.219 mi or 42.195 km (IAAF standard)

Worked example — 4:00:00 marathon

goal_time = 240 min
distance = 26.219 mi
pace = 240 ÷ 26.219 = 9.154 min/mi → 9:09/mi
in km: pace = 240 ÷ 42.195 = 5.687 min/km → 5:41/km
speed (F2): 60 ÷ 5.687 = 10.55 km/h (6.55 mph)
= 9:09/mi (5:41/km) — 6.55 mph

Formula F1 from site/03-globals.md §formulas. Speed calculated via F2. Negative-split variants use F12: first-half pace = even_pace × (1 + split_pct/100); second-half pace = even_pace × (1 − split_pct/100). Common pace bands: sub-3:00 → 4:16/km (6:52/mi); sub-3:30 → 4:58/km (8:00/mi); sub-4:00 → 5:41/km (9:09/mi); sub-4:30 → 6:24/km (10:18/mi); sub-5:00 → 7:06/km (11:26/mi).

Required pace per goal finish time — 42.195 km / 26.219 mi. Source: F1.
Goal Time	Pace /mi	Pace /km	Speed km/h
2:30:00	5:43	3:33	16.88
2:45:00	6:17	3:54	15.34
3:00:00	6:52	4:16	14.07
3:15:00	7:26	4:37	12.98
3:30:00	8:00	4:58	12.06
3:45:00	8:35	5:20	11.25
4:00:00	9:09	5:41	10.55
4:15:00	9:44	6:03	9.93
4:30:00	10:18	6:24	9.38
4:45:00	10:52	6:45	8.89
5:00:00	11:26	7:06	8.44
5:15:00	12:01	7:28	8.03
5:30:00	12:35	7:49	7.67
5:45:00	13:10	8:11	7.34
6:00:00	13:44	8:32	7.03

Paces rounded to nearest second. Speed rounded to two decimal places.

How to Use This Calculator

Three inputs produce your full race plan in seconds.

Enter your Goal Time
Type your target marathon finish time into the Goal Time field (format H:M:S, e.g. 3:45:00). The calculator autofocuses here on load.
Choose a Split Strategy
Select Even, Negative (conservative), or Negative (moderate) from the Split Strategy pill strip. Even splits hold the same pace throughout. Negative splits start slightly slower and finish faster — choose Conservative (2% differential) for a first marathon or Moderate (4%) if you are experienced.
Set Negative Split % (optional)
If you selected a negative strategy, the Negative Split % field appears. The default is 2%. Adjust between 0.5 and 10 in 0.5 steps; values above 6% trigger an aggressive-pacing note.
Press Calculate Marathon Pace
Your required pace per mile and per km appears as the primary result. Four secondary tiles show Finish Time, Speed, Half Split, and Per-5K Split.
Review the Mile-by-Mile Splits Panel
The expanded panel lists every mile with split time, cumulative time, and pace. Miles 18–22 are highlighted in the wall zone. Under a negative strategy the pace changes at the halfway mark — use this table to write splits on your wrist band.

Even Splits

Same pace from mile 1 to mile 26.2
Lower cognitive load during the race
Wall risk if fitness doesn't match goal pace
Energy curve: flat, no reserve built in
PR potential: moderate — optimal only if fitness is exact

Best for: predictable conditions, first marathons, or when your goal time matches recent long-run data.

Negative Splits

First half 1–6% slower, second half 1–6% faster
Conserves glycogen through the wall zone (miles 18–22)
Wall risk: lower — glycogen reserve at the halfway point
Energy curve: gradual build; stronger finish
PR potential: higher for most runners — Santos-Lozano et al. (2014)

Best for: experienced runners, cooler second-half courses, or targeting a personal record.

Average finish time (male)

4:21h:mm

RunRepeat global aggregate, 2023

Average finish time (female)

4:48h:mm

RunRepeat global aggregate, 2023

Top 1% finish time

2:45h:mm

Approx. pace 6:18/mi (3:54/km)

Top 10% finish time

3:20h:mm

Approx. pace 7:38/mi (4:45/km)

Top 25% finish time

3:47h:mm

Approx. pace 8:41/mi (5:23/km)

Median (50th percentile)

4:21h:mm

Varies by event and age group

75th percentile

4:55h:mm

Approx. pace 11:15/mi (6:59/km)

90th percentile

5:30h:mm

Approx. pace 12:35/mi (7:49/km)

Race-Day Fueling by the Mile

Fueling every 30–45 minutes — roughly every 5K — maintains blood glucose and delays glycogen depletion. Here is a six-stage plan aligned with standard marathon aid stations.

Pre-race: 1–2 hours before
Consume 30–60 g of carbohydrate (e.g., oatmeal, banana, toast with honey). Drink 400–600 ml of water. Avoid unfamiliar foods that may cause GI distress.
Miles 1–5: hold back
Take water at every aid station. Skip gels until mile 6 unless your personal fueling plan starts earlier. Adrenaline raises perceived effort — run by pace, not feel.
Miles 6–12: first fuel window
Take the first gel or 30–60 g of carbohydrate at mile 6. Continue water at every station. This window starts topping up glycogen before stores begin to decline.
Miles 13–18: mid-race maintenance
Fuel every 30–45 minutes. If temperatures are above 15 °C (59 °F), add an electrolyte drink or salt tab to replace sodium lost through sweat.
Miles 19–22: the wall zone
Glycogen is lowest here. Take a gel or concentrated carbohydrate drink at mile 19–20 if not already done. Slow-down in this zone is normal; trust your split plan.
Miles 23–26.2: finish strong
If you have held pace through the wall, the final miles can accelerate. Use remaining gel or a caffeinated option at mile 23. Transition to water only in the last 2 miles.

Qualifying standards for major marathons. Sources: Boston Athletic Association, New York Road Runners, London Marathon Charitable Trust.
Event	Qualifying Time	Age Group
Boston Marathon	3:00:00	Men 18–34
Boston Marathon	3:05:00	Men 35–39
Boston Marathon	3:10:00	Men 40–44
Boston Marathon	3:30:00	Women 18–34
Boston Marathon	3:35:00	Women 35–39
Boston Marathon	3:40:00	Women 40–44
New York City Marathon	2:53:00	Men 18–34 (time qualifier)
New York City Marathon	3:13:00	Men 40–44 (time qualifier)
New York City Marathon	3:13:00	Women 18–34 (time qualifier)
New York City Marathon	3:43:00	Women 40–44 (time qualifier)
London Marathon	3:05:00	Men 18–39 (Good for Age)
London Marathon	3:45:00	Women 18–39 (Good for Age)

Standards reflect 2024–2025 cycles and change annually. Always verify with the event's official website before registering.

What This Calculator Assumes

The calculator uses the kinematic pace formula (F1) and assumes certain fixed conditions. Results are a planning reference, not a race prescription.

Even effort assumes flat, road-surface conditions. Elevation, heat, headwind, and course camber all slow you relative to flat-course pace.
The marathon distance is fixed at 42.195 km (26.219 mi) per IAAF standard. GPS watches often read 26.3–26.5 mi due to weaving — plan your actual pace accordingly.
Negative-split percentages (F12) distribute effort linearly across each half. In practice, pace varies by terrain and effort, not linearly.
Fueling effectiveness varies by individual GI tolerance and training adaptation. The fueling plan is a general framework, not clinical nutrition advice.
Boston qualifying standards change each registration cycle. Verify current times at baa.org before training to a specific target.
This calculator does not account for your current fitness level. Use the race-time predictor (based on Riegel F5) to derive a realistic goal time from a recent race.

Explore More Running Tools

Half Marathon Pace Calculator

Goal time to per-mile splits for the 21.0975 km distance.

Race Pace Calculator

Calculate required pace for any race distance and goal time.

Negative Split Calculator

Plan first-half and second-half paces with a custom split percentage.

Race Split Calculator

Generate a full split table for any race distance and strategy.

Sources

1.Pace-Time-Distance Formula (F1) — Kinematic identity — PaceSplit Methodology (accessed 2026-04-21)
2.Negative Split Formula (F12) — Marathon split analysis — Santos-Lozano, A. et al. (2014). Solving the mathematical basis for the optimal marathon pacing strategy., 2014
3.Metabolic factors limiting performance in marathon runners — Rapoport, B.I., PLoS Computational Biology, 2010 (accessed 2026-04-21)
4.Boston Athletic Association Qualifying Standards — Boston Athletic Association (BAA) (accessed 2026-04-21)
5.London Marathon Good for Age Standards — London Marathon Events Ltd. (accessed 2026-04-21)
6.RunRepeat Global Marathon Statistics — RunRepeat, 2023 (accessed 2026-04-21)
7.IAAF Competition Rules — Marathon Distance — World Athletics (IAAF) (accessed 2026-04-21)

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