Pace Calculator

Whether you're training for your first 5K or trying to qualify for Boston, knowing your pace matters more than almost any other number in running. This calculator covers three common situations: finding your pace from a time and distance, projecting a finish time from a target pace, and estimating distance when you have a set amount of time to run. Put in what you know, and the math takes care of the rest.

Enter Details

Distance

Unit

Time (duration)

Result

Enter distance and time for your run or ride.

Note — This result is an estimate. Talk to a healthcare provider for personalized guidance.

How to Use This Pace Calculator

There are three modes. Choose the one that fits what you already have, fill in two values, and the calculator figures out the third. Miles or kilometers, your call. Here's what each mode actually does.

Calculate Pace from Time and Distance

Probably the most common reason people land here. Enter the time your run took and how far you went, and the calculator divides one by the other to give you a per-mile (or per-kilometer) pace. Really useful after a race or a hard training run when you want a concrete number.

Quick example: 6 miles in 54 minutes works out to exactly 9:00 per mile.

Calculate Finish Time from Pace

Racing soon and have a pace goal in mind? Enter that pace and the race distance, and you'll get a projected finish time. Handy for race-day planning. If you know 8:30 per mile is realistic for you, this tells you what the clock will say when you cross the line.

Worth noting: this assumes perfectly even splits, which almost never happens. Most people go out a bit fast. Factor in a small buffer if you want to be honest with yourself.

Calculate Distance from Pace and Time

Got 45 minutes to run and curious how far that'll get you? Plug in your expected pace and the time you have, and the calculator spits out the distance. Good for those looser training days where you're running by feel and time rather than hitting a specific mileage target.

Pace vs. Speed - What's the Difference?

Runners talk in pace. Cyclists and swimmers tend to use speed. Both describe how fast you're moving, just expressed differently. Pace is time per unit of distance, like minutes per mile. Speed is distance per unit of time, like miles per hour. Same concept, basically flipped.

For running, pace is almost always the more useful number. It connects directly to effort and race planning in a way that miles per hour just doesn't.

Pace Formula (min/mile or min/km)

Pretty simple formula:

Pace = Time ÷ Distance

Time in minutes, distance in miles, and you get minutes per mile. Just make sure you convert everything to total minutes before dividing. A 1:45:00 half marathon is 105 minutes over 13.1 miles, which comes out to roughly 8:01 per mile.

Speed Formula (mph or km/h)

Speed just flips things around:

Speed = Distance ÷ Time

Distance in miles (or km), time in hours. That same 1:45 half marathon works out to about 7.49 mph. Not something most runners think about day to day, but it's useful when you're setting a treadmill speed or trying to compare running to other workouts.

How to Convert Pace to Speed and Back

The key thing to remember is that pace uses minutes while speed is based on hours, so 60 is the number you're working with.

Pace to speed (mph): Divide 60 by your pace in minutes per mile. A 10:00/mile pace gives you 60 ÷ 10 = 6.0 mph.
Speed to pace (min/mile): Divide 60 by your speed in mph. At 7.5 mph, that's 60 ÷ 7.5 = 8:00 per mile.

Same logic works for kilometers. Just swap miles for km and you're good.

Pace Chart for Common Race Distances

The charts below show projected finish times across a range of paces for the four most popular race distances. Find your goal time, look across to the pace column, and that's your target. These all assume consistent, even pacing from start to finish.

5K Pace Chart

Pace (min/mile)	Pace (min/km)	5K Finish Time
6:00	3:44	18:38
7:00	4:21	21:45
8:00	4:58	24:51
9:00	5:35	27:58
10:00	6:12	31:04
11:00	6:50	34:11
12:00	7:27	37:17
13:00	8:04	40:24
14:00	8:41	43:31

10K Pace Chart

Pace (min/mile)	Pace (min/km)	10K Finish Time
6:00	3:44	37:17
7:00	4:21	43:30
8:00	4:58	49:42
9:00	5:35	55:55
10:00	6:12	1:02:08
11:00	6:50	1:08:21
12:00	7:27	1:14:34
13:00	8:04	1:20:47
14:00	8:41	1:27:00

Half Marathon Pace Chart

Pace (min/mile)	Pace (min/km)	Half Marathon Finish Time
6:00	3:44	1:18:33
7:00	4:21	1:31:38
8:00	4:58	1:44:44
9:00	5:35	1:57:50
10:00	6:12	2:10:55
11:00	6:50	2:24:01
12:00	7:27	2:37:06
13:00	8:04	2:50:12
14:00	8:41	3:03:17

Marathon Pace Chart

Pace (min/mile)	Pace (min/km)	Marathon Finish Time
6:00	3:44	2:37:07
7:00	4:21	3:03:16
8:00	4:58	3:29:28
9:00	5:35	3:55:40
10:00	6:12	4:21:50
11:00	6:50	4:48:02
12:00	7:27	5:14:14
13:00	8:04	5:40:25
14:00	8:41	6:06:36

The marathon is where even pacing really, truly matters. Go out just 30 seconds per mile too fast in the first half and you can easily give back several minutes late in the race, sometimes a lot more than that. Use this chart to set a realistic goal pace before you even get to the start line.