Convert distances between kilometres, miles, yards and furlongs.
Distance
Split Time
Lap Time
Lap Length
This table shows paces multiplied by distances, which of course becomes finish times.
Finish times
Pace
100 m
400 m
800 m
3 km
5 km
10 km
HM
Marathon
50 mi
100 km
100 mi
2:30
15s
1:00
2:00
7:30
12:30
25:00
52:45
1:45:29
3:21:10
4:10:00
6:42:20
2:40
16s
1:04
2:08
8:00
13:20
26:40
56:16
1:52:31
3:34:35
4:26:40
7:09:10
2:50
17s
1:08
2:16
8:30
14:10
28:20
59:47
1:59:33
3:47:59
4:43:20
7:35:59
3:00
18s
1:12
2:24
9:00
15:00
30:00
1:03:18
2:06:35
4:01:24
5:00:00
8:02:48
3:10
19s
1:16
2:32
9:30
15:50
31:40
1:06:49
2:13:37
4:14:49
5:16:40
8:29:38
3:20
20s
1:20
2:40
10:00
16:40
33:20
1:10:20
2:20:39
4:28:13
5:33:20
8:56:27
3:30
21s
1:24
2:48
10:30
17:30
35:00
1:13:50
2:27:41
4:41:38
5:50:00
9:23:16
3:40
22s
1:28
2:56
11:00
18:20
36:40
1:17:21
2:34:43
4:55:03
6:06:40
9:50:06
3:50
23s
1:32
3:04
11:30
19:10
38:20
1:20:52
2:41:45
5:08:27
6:23:20
10:16:55
4:00
24s
1:36
3:12
12:00
20:00
40:00
1:24:23
2:48:47
5:21:52
6:40:00
10:43:44
4:10
25s
1:40
3:20
12:30
20:50
41:40
1:27:54
2:55:49
5:35:17
6:56:40
11:10:34
4:20
26s
1:44
3:28
13:00
21:40
43:20
1:31:25
3:02:51
5:48:41
7:13:20
11:37:23
4:30
27s
1:48
3:36
13:30
22:30
45:00
1:34:56
3:09:53
6:02:06
7:30:00
12:04:12
4:40
28s
1:52
3:44
14:00
23:20
46:40
1:38:27
3:16:55
6:15:31
7:46:40
12:31:02
4:50
29s
1:56
3:52
14:30
24:10
48:20
1:41:58
3:23:57
6:28:55
8:03:20
12:57:51
5:00
30s
2:00
4:00
15:00
25:00
50:00
1:45:29
3:30:59
6:42:20
8:20:00
13:24:40
5:10
31s
2:04
4:08
15:30
25:50
51:40
1:49:00
3:38:00
6:55:45
8:36:40
13:51:30
5:20
32s
2:08
4:16
16:00
26:40
53:20
1:52:31
3:45:02
7:09:10
8:53:20
14:18:19
5:30
33s
2:12
4:24
16:30
27:30
55:00
1:56:02
3:52:04
7:22:34
9:10:00
14:45:08
5:40
34s
2:16
4:32
17:00
28:20
56:40
1:59:33
3:59:06
7:35:59
9:26:40
15:11:58
5:50
35s
2:20
4:40
17:30
29:10
58:20
2:03:04
4:06:08
7:49:24
9:43:20
15:38:47
6:00
36s
2:24
4:48
18:00
30:00
1:00:00
2:06:35
4:13:10
8:02:48
10:00:00
16:05:36
6:10
37s
2:28
4:56
18:30
30:50
1:01:40
2:10:06
4:20:12
8:16:13
10:16:40
16:32:26
6:20
38s
2:32
5:04
19:00
31:40
1:03:20
2:13:37
4:27:14
8:29:38
10:33:20
16:59:15
6:30
39s
2:36
5:12
19:30
32:30
1:05:00
2:17:08
4:34:16
8:43:02
10:50:00
17:26:04
6:40
40s
2:40
5:20
20:00
33:20
1:06:40
2:20:39
4:41:18
8:56:27
11:06:40
17:52:54
6:50
41s
2:44
5:28
20:30
34:10
1:08:20
2:24:10
4:48:20
9:09:52
11:23:20
18:19:43
7:00
42s
2:48
5:36
21:00
35:00
1:10:00
2:27:41
4:55:22
9:23:16
11:40:00
18:46:32
4:00
15s
1:00
1:59
7:27
12:26
24:51
52:26
1:44:53
3:20:00
4:08:33
6:40:00
4:10
16s
1:02
2:04
7:46
12:57
25:53
54:37
1:49:15
3:28:20
4:18:54
6:56:40
4:20
16s
1:05
2:09
8:05
13:28
26:56
56:48
1:53:37
3:36:40
4:29:16
7:13:20
4:30
17s
1:07
2:14
8:23
13:59
27:58
59:00
1:57:59
3:45:00
4:39:37
7:30:00
4:40
17s
1:10
2:19
8:42
14:30
29:00
1:01:11
2:02:21
3:53:20
4:49:58
7:46:40
4:50
18s
1:12
2:24
9:01
15:01
30:02
1:03:22
2:06:43
4:01:40
5:00:20
8:03:20
5:00
19s
1:15
2:29
9:19
15:32
31:04
1:05:33
2:11:06
4:10:00
5:10:41
8:20:00
5:10
19s
1:17
2:34
9:38
16:03
32:06
1:07:44
2:15:28
4:18:20
5:21:03
8:36:40
5:20
20s
1:20
2:39
9:57
16:34
33:08
1:09:55
2:19:50
4:26:40
5:31:24
8:53:20
5:30
21s
1:22
2:44
10:15
17:05
34:11
1:12:06
2:24:12
4:35:00
5:41:45
9:10:00
5:40
21s
1:25
2:49
10:34
17:36
35:13
1:14:17
2:28:34
4:43:20
5:52:07
9:26:40
5:50
22s
1:27
2:54
10:52
18:07
36:15
1:16:28
2:32:57
4:51:40
6:02:28
9:43:20
6:00
22s
1:29
2:59
11:11
18:38
37:17
1:18:39
2:37:19
5:00:00
6:12:49
10:00:00
6:10
23s
1:32
3:04
11:30
19:10
38:19
1:20:50
2:41:41
5:08:20
6:23:11
10:16:40
6:20
24s
1:34
3:09
11:48
19:41
39:21
1:23:02
2:46:03
5:16:40
6:33:32
10:33:20
6:30
24s
1:37
3:14
12:07
20:12
40:23
1:25:13
2:50:25
5:25:00
6:43:53
10:50:00
6:40
25s
1:39
3:19
12:26
20:43
41:25
1:27:24
2:54:48
5:33:20
6:54:15
11:06:40
6:50
25s
1:42
3:24
12:44
21:14
42:28
1:29:35
2:59:10
5:41:40
7:04:36
11:23:20
7:00
26s
1:44
3:29
13:03
21:45
43:30
1:31:46
3:03:32
5:50:00
7:14:58
11:40:00
7:10
27s
1:47
3:34
13:22
22:16
44:32
1:33:57
3:07:54
5:58:20
7:25:19
11:56:40
7:20
27s
1:49
3:39
13:40
22:47
45:34
1:36:08
3:12:16
6:06:40
7:35:40
12:13:20
7:30
28s
1:52
3:44
13:59
23:18
46:36
1:38:19
3:16:38
6:15:00
7:46:02
12:30:00
7:40
29s
1:54
3:49
14:17
23:49
47:38
1:40:30
3:21:01
6:23:20
7:56:23
12:46:40
7:50
29s
1:57
3:54
14:36
24:20
48:40
1:42:41
3:25:23
6:31:40
8:06:44
13:03:20
8:00
30s
1:59
3:59
14:55
24:51
49:43
1:44:53
3:29:45
6:40:00
8:17:06
13:20:00
8:10
30s
2:02
4:04
15:13
25:22
50:45
1:47:04
3:34:07
6:48:20
8:27:27
13:36:40
8:20
31s
2:04
4:09
15:32
25:53
51:47
1:49:15
3:38:29
6:56:40
8:37:49
13:53:20
8:30
32s
2:07
4:14
15:51
26:24
52:49
1:51:26
3:42:52
7:05:00
8:48:10
14:10:00
8:40
32s
2:09
4:18
16:09
26:56
53:51
1:53:37
3:47:14
7:13:20
8:58:31
14:26:40
8:50
33s
2:12
4:23
16:28
27:27
54:53
1:55:48
3:51:36
7:21:40
9:08:53
14:43:20
9:00
34s
2:14
4:28
16:47
27:58
55:55
1:57:59
3:55:58
7:30:00
9:19:14
15:00:00
9:10
34s
2:17
4:33
17:05
28:29
56:58
2:00:10
4:00:20
7:38:20
9:29:35
15:16:40
9:20
35s
2:19
4:38
17:24
29:00
58:00
2:02:21
4:04:43
7:46:40
9:39:57
15:33:20
9:30
35s
2:22
4:43
17:43
29:31
59:02
2:04:32
4:09:05
7:55:00
9:50:18
15:50:00
9:40
36s
2:24
4:48
18:01
30:02
1:00:04
2:06:43
4:13:27
8:03:20
10:00:40
16:06:40
9:50
37s
2:27
4:53
18:20
30:33
1:01:06
2:08:55
4:17:49
8:11:40
10:11:01
16:23:20
10:00
37s
2:29
4:58
18:38
31:04
1:02:08
2:11:06
4:22:11
8:20:00
10:21:22
16:40:00
10:10
38s
2:32
5:03
18:57
31:35
1:03:10
2:13:17
4:26:33
8:28:20
10:31:44
16:56:40
10:20
39s
2:34
5:08
19:16
32:06
1:04:13
2:15:28
4:30:56
8:36:40
10:42:05
17:13:20
10:30
39s
2:37
5:13
19:34
32:37
1:05:15
2:17:39
4:35:18
8:45:00
10:52:26
17:30:00
10:40
40s
2:39
5:18
19:53
33:08
1:06:17
2:19:50
4:39:40
8:53:20
11:02:48
17:46:40
10:50
40s
2:42
5:23
20:12
33:39
1:07:19
2:22:01
4:44:02
9:01:40
11:13:09
18:03:20
11:00
41s
2:44
5:28
20:30
34:11
1:08:21
2:24:12
4:48:24
9:10:00
11:23:30
18:20:00
The laps in a backyard
ultra are always 6706 meters (4.167 miles), and must be completed within one hour.
The table below shows what pace you must keep to be able to rest for a certain duration before the next lap starts.
Rest
Pace
0 min
8:57 min/km
14:24 min/mi
1 min
8:48 min/km
14:10 min/mi
2 min
8:39 min/km
13:55 min/mi
3 min
8:30 min/km
13:41 min/mi
4 min
8:21 min/km
13:26 min/mi
5 min
8:12 min/km
13:12 min/mi
6 min
8:03 min/km
12:58 min/mi
7 min
7:54 min/km
12:43 min/mi
8 min
7:45 min/km
12:29 min/mi
9 min
7:36 min/km
12:14 min/mi
10 min
7:27 min/km
12:00 min/mi
11 min
7:18 min/km
11:46 min/mi
12 min
7:09 min/km
11:31 min/mi
13 min
7:01 min/km
11:17 min/mi
14 min
6:52 min/km
11:02 min/mi
15 min
6:43 min/km
10:48 min/mi
16 min
6:34 min/km
10:34 min/mi
17 min
6:25 min/km
10:19 min/mi
18 min
6:16 min/km
10:05 min/mi
19 min
6:07 min/km
9:50 min/mi
20 min
5:58 min/km
9:36 min/mi
This table shows the total distance completed after a certain number of laps. The time is the number of laps times 1 hour.
Laps
Distance
1
6.706 km
4.167 mi
2
13.412 km
8.334 mi
3
20.118 km
12.501 mi
4
26.824 km
16.668 mi
5
33.53 km
20.835 mi
6
40.236 km
25.001 mi
7
46.942 km
29.168 mi
8
53.648 km
33.335 mi
9
60.354 km
37.502 mi
10
67.06 km
41.669 mi
11
73.766 km
45.836 mi
12
80.472 km
50.003 mi
13
87.178 km
54.17 mi
14
93.884 km
58.337 mi
15
100.59 km
62.504 mi
16
107.296 km
66.671 mi
17
114.002 km
70.838 mi
18
120.708 km
75.004 mi
19
127.414 km
79.171 mi
20
134.12 km
83.338 mi
21
140.826 km
87.505 mi
22
147.532 km
91.672 mi
23
154.238 km
95.839 mi
24
160.944 km
100.006 mi
25
167.65 km
104.173 mi
26
174.356 km
108.34 mi
27
181.062 km
112.507 mi
28
187.768 km
116.674 mi
29
194.474 km
120.841 mi
30
201.18 km
125.007 mi
31
207.886 km
129.174 mi
32
214.592 km
133.341 mi
33
221.298 km
137.508 mi
34
228.004 km
141.675 mi
35
234.71 km
145.842 mi
36
241.416 km
150.009 mi
37
248.122 km
154.176 mi
38
254.828 km
158.343 mi
39
261.534 km
162.51 mi
40
268.24 km
166.677 mi
41
274.946 km
170.844 mi
42
281.652 km
175.01 mi
43
288.358 km
179.177 mi
44
295.064 km
183.344 mi
45
301.77 km
187.511 mi
46
308.476 km
191.678 mi
47
315.182 km
195.845 mi
48
321.888 km
200.012 mi
49
328.594 km
204.179 mi
50
335.3 km
208.346 mi
51
342.006 km
212.513 mi
52
348.712 km
216.68 mi
53
355.418 km
220.847 mi
54
362.124 km
225.013 mi
55
368.83 km
229.18 mi
56
375.536 km
233.347 mi
57
382.242 km
237.514 mi
58
388.948 km
241.681 mi
59
395.654 km
245.848 mi
60
402.36 km
250.015 mi
61
409.066 km
254.182 mi
62
415.772 km
258.349 mi
63
422.478 km
262.516 mi
64
429.184 km
266.683 mi
65
435.89 km
270.849 mi
66
442.596 km
275.016 mi
67
449.302 km
279.183 mi
68
456.008 km
283.35 mi
69
462.714 km
287.517 mi
70
469.42 km
291.684 mi
This calculator uses Jack Daniels" formula for calculating
"VDOT" (
V̇O2max) from a race performance, which is not the same thing as VO2max, but is somewhat related.
You can use VDOT to compare performances or to get training paces from (see Jack Daniels" calculator).
It is recommended to use a race distance between 1500 m and 50 km.
Distances can be entered as e.g. "5k", "1mi", "400yds", "Marathon", "Half Marathon", or simply "1000m" or "2.5km".
Time and pace can be entered as e.g. "30m", "7m30s", "4h30m", or (HH:)MM:SS.
This calculator "splits" the above distance into smaller chunks below, and calculates how fast each part of the distance was covered, on average. It is very likely that the speed varied, which means that some parts were even faster than this.
Distances can be entered as e.g. "5k", "1mi", "400yds", "Marathon", "Half Marathon", or simply "1000m" or "2.5km".
Time and pace can be entered as e.g. "30m", "7m30s", "4h30m", or (HH:)MM:SS.
Distance
Time
By entering a known (recent) race time, you can predict the equivalent race time at another distance.
Race Prediction Calculator is a useful tool for beginners and experienced runners looking to improve their performance in a 5K, 10K, Half Marathon or Marathon race. The calculator will calculate based on your previous running score for the next running competition. The forecasting calculator will give you information about possible future results quickly without complex analysis.
Marathon time predictor
How to Predict Race Time
The timing of predicting your future race is based on a mathematical formula developed by Peter Rigel. The formula for predicting race times was first published in 1977 in Runner’s World Magazine. This formula has been approved and has been adopted for many years.
T₂=T₁x(D₂/D₁)1.06
where:
T₁ is the time achieved recently on distance D₁ T₂ is the predicted time for distance D₂ D₁ is the distance over which T₁ time was achieved D₂ is the distance for which T₂ time is foreseen
FAQ about Race Predictor Calculator
How to use the Race Predictor Calculator?
🟥 In the “Distance” field, add the distance of the race that you ran. 🟥 In the second field “Known time” add the time for which you have overcome this race. 🟥 In the “Other distance” field, add the distance that you plan to run. 🟥 In the “Predicted time” field, the time for which you are supposed to run the future race distance will appear
How does the race time calculator work?
The formula has the form:
T2 = T1 x (D2 / D1) 1.06
Where T1 is the set time, D1 is the set distance, D2 is the distance for which the time is predicted, and T2 is the calculated time for D2.
Why do you need a Race Predictor calculator?
Race Predictor is a useful calculator for beginners and experienced runners who want to predict the results of their future races. For example, you ran 10 km on the basis of the time for which you ran this distance, you can calculate the estimated time at another distance, for example, a half marathon. Of course, the calculator will not be able to give the exact time because your pace in the race will be affected by your fitness, well-being and weather conditions, as well as the terrain of the track.
