What pace do I need for a 2-hour half marathon?

If you want to break two hours, you need an average pace of about 5:41 per kilometer, or 9:09 per mile. That brings you through 10K in 56:53 and 20K in 1:53:45. A smart approach is keeping the first 5K relaxed so you feel strong enough to hold that pace late in the race.

What pace is a 1:45 or 1:30 half marathon?

A 1:45 finish requires roughly 4:59 per kilometer, while breaking 1:30 means holding about 4:16 per kilometer. These are very different efforts. You can enter your exact goal in the calculator above to see the precise pace and your full split table.

Should I run even splits for a half marathon?

For most runners, even pacing is the most reliable strategy. A half marathon is long enough that starting too fast will hurt, but short enough that you need to find your rhythm quickly. Settle into your goal pace by 3K and trust the plan.

How accurate is a half marathon pace plan?

The math is exact. The calculator just divides your goal time by the official 21.0975 kilometers. But race day has variables like heat, hills, wind, and crowding. Use your calculated splits as a helpful guide, and always listen to how your body feels.

Can I use miles instead of kilometers?

Absolutely. The calculator defaults to kilometers since most Tokyo races use metric markers, but you can switch to miles with one tap. The tool saves your choice and instantly updates your split plan.

Can I share or print my half marathon splits?

Yes. Use the share button to copy a link that opens your exact plan, or copy the splits directly to your notes. You can also print a pace band for a compact list of your checkpoints to take to the start line.

Pace Calculators

Half Marathon Pace Calculator

Turn your half marathon goal into a clear race day plan. Get your exact average pace, reliable 5K checkpoints, and a complete split table you can carry with you.

Half 21.0975 km

Goal time

hh:mm:ss

Strategy

Split interval

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Average pace

5:41 /km

km/h

10.5

mph

6.6

10K

0:56:53

Finish

2:00:00

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Half marathon checkpoints

Your target clock time at 5K, 10K, 15K, 20K, and the finish.

Half marathon checkpoints
Marker	Target time
5 km	28:26
10 km	56:53
15 km	1:25:19
20 km	1:53:45
Finish	2:00:00

Splits

Use the full split table for your watch, pace band, or race-day notes.

Splits
Split	Pace	Elapsed
1 km	5:41	5:41
2 km	5:41	11:23
3 km	5:41	17:04
4 km	5:41	22:45
5 km	5:41	28:26
6 km	5:41	34:08
7 km	5:41	39:49
8 km	5:41	45:30
9 km	5:41	51:11
10 km	5:41	56:53
11 km	5:41	1:02:34
12 km	5:41	1:08:15
13 km	5:41	1:13:57
14 km	5:41	1:19:38
15 km	5:41	1:25:19
16 km	5:41	1:31:00
17 km	5:41	1:36:42
18 km	5:41	1:42:23
19 km	5:41	1:48:04
20 km	5:41	1:53:45
21 km	5:41	1:59:27
21.1 km	5:41	2:00:00

A half marathon is a fantastic distance. It requires patience and rhythm, but having a solid plan takes a lot of the stress away. This calculator turns your goal time into a clear roadmap so you know exactly what to expect on race day.

Just enter your target finish time below, or pick a common goal like a sub-2:00. You will instantly get your average pace and a complete table of splits. The calculator defaults to kilometers, but you can easily switch to miles if that is what you prefer.

How half marathon pace works

average pace = goal time ÷ 21.0975 km

Finding your average pace is just a matter of dividing your goal time by the official half marathon distance of 21.0975 kilometers. For example, a 2:00:00 goal is 7,200 seconds. Divide that by 21.0975, and you get 341.3 seconds, which is about 5:41 per kilometer.

Common half marathon goal paces

Sometimes it helps to just see the numbers up front. Here are the average paces you need for some of the most common half marathon goals:

Sub-1:30: 4:16 per km
Sub-1:45: 4:59 per km
Sub-2:00: 5:41 per km
Sub-2:15: 6:24 per km
Sub-2:30: 7:07 per km

If you are racing in Tokyo, remember that almost all local events use kilometer markers. Even if you train with miles, it is worth knowing your 5K, 10K, 15K, and 20K targets so you can check your progress quickly.

Running a half marathon in Tokyo

If you are planning to run a half marathon in Tokyo, the season plays a huge role. Cool winter and early spring mornings are perfect for fast running, while late spring and summer humidity can make your goal pace feel much harder than the same number on a treadmill.

For tune-up workouts, local loops make pacing much easier. The Imperial Palace loop is roughly 5 kilometers. Running four steady loops plus a little extra is very close to half marathon distance. Trying a few controlled loops at your target pace is a great way to tell whether the goal feels realistic before race day.

The Tokyo Legacy Half Marathon in October is the biggest local race at this distance. It starts and finishes at the National Stadium and has a relatively flat profile, making it a great place to aim for a personal best.

A local group run is an excellent way to practice your race pace. Our free weekly email rounds up running events across Tokyo, and our club directory can help you find people training at your exact pace.

Keep running in Tokyo

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How to use this tool

Set your goal time

Enter your target finish time, or tap one of the common presets like sub-2:00. The calculator is already locked to the official half marathon distance of 21.0975 km.
Review your checkpoints

Check your average pace and target times at 5K, 10K, 15K, and 20K so you know exactly what the clock should say when you pass those markers.
Save your split plan

Use the action buttons to copy your splits, share your plan as a link, or print a compact race day reference.

Half marathon pacing choices

For most runners, even pacing with a relaxed first 5K is the best way to run a strong half marathon.

Common ways to pace the half marathon distance
Strategy	How it runs	Best for
Even pace	The same pace from start to finish	Most runners and first half marathons
Negative split	Second half slightly faster than the first	Experienced runners with a strong aerobic base
Positive split	Going out fast and slowing down late	Rarely ideal unless the course profile demands it

Sources

FAQ

What pace do I need for a 2-hour half marathon?: If you want to break two hours, you need an average pace of about 5:41 per kilometer, or 9:09 per mile. That brings you through 10K in 56:53 and 20K in 1:53:45. A smart approach is keeping the first 5K relaxed so you feel strong enough to hold that pace late in the race.
What pace is a 1:45 or 1:30 half marathon?: A 1:45 finish requires roughly 4:59 per kilometer, while breaking 1:30 means holding about 4:16 per kilometer. These are very different efforts. You can enter your exact goal in the calculator above to see the precise pace and your full split table.
Should I run even splits for a half marathon?: For most runners, even pacing is the most reliable strategy. A half marathon is long enough that starting too fast will hurt, but short enough that you need to find your rhythm quickly. Settle into your goal pace by 3K and trust the plan.
How accurate is a half marathon pace plan?: The math is exact. The calculator just divides your goal time by the official 21.0975 kilometers. But race day has variables like heat, hills, wind, and crowding. Use your calculated splits as a helpful guide, and always listen to how your body feels.
Can I use miles instead of kilometers?: Absolutely. The calculator defaults to kilometers since most Tokyo races use metric markers, but you can switch to miles with one tap. The tool saves your choice and instantly updates your split plan.
Can I share or print my half marathon splits?: Yes. Use the share button to copy a link that opens your exact plan, or copy the splits directly to your notes. You can also print a pace band for a compact list of your checkpoints to take to the start line.