Marathon Splits Per Mile — Goal-Time Pace Tables for Every Mile

Quick Answer: Even Pace by Goal Time

Use this table to find your per-mile pace and halfway split at a glance.

All paces assume perfectly even effort across all 26.2 miles.

How to Read Marathon Mile Splits

There are two numbers you’ll encounter on a pace chart: per-mile pace and cumulative clock time.

• Per-mile pace is how long each individual mile should take. For a 4:00 marathon that’s 9:09/mi—the same value you’d see on a GPS watch.
• Cumulative clock time is what the race clock reads when you cross each mile marker. Mile 1 at 9:10, mile 13 at 1:59:05, mile 26 at 3:58:10, and so on.

Pace bands and race-day wristbands almost always show cumulative times, because that’s what you read off the mile-marker clocks on the course. Your GPS shows per-mile pace. You need both.

Calculating your own splits is straightforward: divide your goal time in seconds by 26.2 to get your per-mile split in seconds, then convert back to minutes:seconds. For a 3:45 goal—

3:45:00 = 13,500 seconds ÷ 26.2 = 515.3 seconds = 8:35/mi

Build cumulative times by multiplying that per-mile split by the mile number. Mile 10 at a 3:45 pace: 8:35 × 10 = 85:50, or 1:25:50.

Mile-by-Mile Splits for a 4:00 Marathon

The 4-hour marathon is the most commonly searched goal time. Here is the full mile-by-mile cumulative clock at an even 9:09/mi pace.

Print this table, fold it, and tape it to your wrist before you toe the start line. The half-marathon checkpoint at 2:00:00 is your clearest early feedback signal.

Even Splits vs Negative Splits

Even pacing means every mile takes the same amount of time. Negative splitting means you run the second half of the race faster than the first.

Why even pacing is the safe default: It requires no complex mental math and protects you from going out too fast. Most recreational runners who blow up in miles 18–22 started with a positive split—they ran the first half faster than planned and paid for it later.

Why a slight negative split is even better: Research consistently shows that elite marathon finishers run the second half marginally faster (1–2%) than the first. The reason is physiological: you preserve glycogen, keep lactate below threshold, and avoid the glycogen crash that causes pace to collapse after mile 20.

A practical strategy: target even pace through mile 18, then decide based on feel whether to push. If you feel strong at mile 20, you’ve earned a negative split. If you feel wobbly, you’ll finish on fumes but still finish—because you started conservatively.

Positive splits are the enemy. Running the first half in 1:55 when your goal is 4:00 feels great at mile 6. At mile 22 it rarely does.

How to Hit Your Splits on Race Day

1. Print or write a pace band. Use cumulative clock times, not per-mile pace. Glancing at a clock at mile 18 is faster than doing division in an oxygen-depleted brain.
2. Ignore your GPS for the first mile. Crowds, building density, and tunnel starts cause GPS to read short or long. Use the official mile markers as your ground truth.
3. Run the tangents. The certified 26.2-mile course distance assumes you run the shortest legal path through every turn. GPS often records 26.4–26.8 miles for runners who drift to the outside of bends. Stick to the inside of curves and you’ll arrive at the finish closer to your planned clock time.
4. Tie fueling windows to your splits. If you plan to take a gel every 45 minutes, use your cumulative split chart to pre-mark those mile markers. Fueling by time is more reliable than by feel.
5. Adjust for terrain, not the clock. On a long downhill, your GPS pace will look fast; on an uphill, it’ll look slow. Trust effort on significant grades and return to the cumulative clock check at the next flat mile marker.

Common Pacing Mistakes

• Starting too fast. The first mile of a marathon always feels easy. Run it 15–20 seconds per mile slower than your goal pace, not faster.
• Chasing GPS pace over feel. A 9:09/mi goal doesn’t mean you sprint to recapture pace after a hill. Effort is the real currency; pace is the receipt.
• Ignoring tangents and then being surprised by distance. If your GPS hits 26.2 at mile marker 25.8, your “extra” mileage came from wide turns. You’ll still need to reach the finish line.
• No plan for hills or heat. Even pacing on paper doesn’t account for a 200-foot climb at mile 18 or a 75°F race day. In heat, slow every mile by 10–20 seconds for every 5°F above 55°F. On hills, run by effort and accept the slower split.
• Skipping the halfway checkpoint. Crossing 13.1 miles even one minute ahead of your half-split is a warning sign. Cross it one minute behind and you likely have a buffer.

Frequently Asked Questions

What are marathon splits per mile?

Marathon splits per mile are the expected cumulative clock time at each mile marker based on your goal finish time and a chosen pacing strategy. If you run an even pace for a 4:00 marathon, your splits are 9:09 per mile—so you should see 9:10 at mile 1, roughly 1:31:36 at mile 10, and 2:00:00 at the half.

What is the per-mile pace for a 4-hour marathon?

A 4-hour marathon requires an even pace of 9:09 per mile (5:41/km). Your halfway split should be right at 2:00:00. See the full mile-by-mile cumulative table above for every marker from mile 1 through 26.2.

How do I calculate my marathon mile splits?

Divide your goal time in seconds by 26.2 to get your per-mile split in seconds. Example: 4:30:00 = 16,200 seconds ÷ 26.2 = 618.3 seconds = 10:18/mi. Multiply that per-mile split by each mile number for cumulative clock times.

Should marathon splits be even or negative?

Even splits are the simplest and most forgiving strategy for most runners. A slight negative split—running the second half a few seconds per mile faster than the first—produces the best finishing times on average, because you conserve glycogen and avoid the crash that follows an aggressive first half. Avoid positive splits (faster first half) at almost all costs.

Why is my GPS distance longer than 26.2 miles?

Marathon courses are certified along the shortest legal path through every turn. Runners who don’t follow the tangents—staying to the inside of every curve—add distance. GPS also accumulates small errors around buildings and under trees. It’s normal for a GPS watch to record 26.4–26.8 miles on a certified 26.2-mile course.

What pace is a 3:30 or 4:30 marathon per mile?

A 3:30 marathon requires 8:01 per mile (4:59/km), with a half-marathon split of 1:45:00. A 4:30 marathon requires 10:18 per mile (6:24/km), with a half split of 2:15:00. Both figures assume perfectly even pacing across all 26.2 miles.

Related Pacing Guides

• Sub-4 Marathon Pace — Full Training & Race Strategy
• Sub-3 Marathon Pace — Week-by-Week Plan
• Boston Qualifying Pace — Standards, Splits & Training
• Marathon Pace Chart — Full Hub
• How Long Does It Take to Run a Marathon?
• First Marathon Training Plan — AI Coach Guide

Get Your Pace Plan

Knowing your marathon splits per mile is only half the job—executing them on tired legs at mile 22 is where training pays off. WattRun builds a personalized marathon training plan around your current fitness, goal time, and schedule, then sends you an AI coach insight after every long run so you always know whether you’re on track.

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Last updated: May 2026. Sources: pace math from a 26.2-mile / 42.195 km marathon.