Use Forecast Your Finish to calculate your finish time at a different race distance, or to see how fast you might run at a World Marathon Major!

Our forecast application also includes an innovative Heat & Hills Index.

ENTER RECENT RACE DATA

ENTER TARGET RACE DATA

Data is outside of range limits – please try again.
The minimum time for 5km is 0:13:00
Data is outside of range limits – please try again.
The minimum time for 10km is 0:27:00
Data is outside of range limits – please try again.
The minimum time for 21km is 1:00:00
Data is outside of range limits – please try again.
The minimum time for 42km is 2:00:00
PREDICTED RACE COMPLETION TIME
AVERAGE PACE
SPLITS
1km
2km
3km
4km
5km
5km
10km
5km
10km
15km
20km
5km
10km
15km
20km
25km
30km
35km
40km
PREDICTED RACE COMPLETION TIME
AVERAGE PACE
PREDICTED RACE COMPLETION TIME
AVERAGE PACE
PREDICTED RACE COMPLETION TIME
AVERAGE PACE
SPLITS
1km
2km
3km
4km
5km
5km
10km
5km
10km
15km
20km
5km
10km
15km
20km
25km
30km
35km
40km
SPLITS
1km
2km
3km
4km
5km
5km
10km
5km
10km
15km
20km
5km
10km
15km
20km
25km
30km
35km
40km
SPLITS
1km
2km
3km
4km
5km
5km
10km
5km
10km
15km
20km
5km
10km
15km
20km
25km
30km
35km
40km

ENTER RECENT RACE DATA

ENTER TARGET RACE DATA

Data is outside of range limits – please try again.
The accepted time range for 5km is 0:13:00 - 00:49:00, 10km is 0:27:00 - 1:39:00, 21km is 1:00:00 - 3:29:00 and 42km is 2:00:00 - 6:59:00
Data is outside of range limits – please try again.
The accepted time range for 5km is 0:13:00 - 00:49:00, 10km is 0:27:00 - 1:39:00, 21km is 1:00:00 - 3:29:00 and 42km is 2:00:00 - 6:59:00
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'HOT & HUMID' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS

ENTER RECENT RACE DATA

ENTER TARGET RACE

Data is outside of range limits – please try again.
The accepted time range for 5km is 0:13:00 - 00:49:00, 10km is 0:27:00 - 1:39:00, 21km is 1:00:00 - 3:29:00 and 42km is 2:00:00 - 6:59:00
Data is outside of range limits – please try again.
The accepted time range for 5km is 0:13:00 - 00:49:00, 10km is 0:27:00 - 1:39:00, 21km is 1:00:00 - 3:29:00 and 42km is 2:00:00 - 6:59:00
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED 42KM COMPLETION TIME IN BERLIN
PREDICTED 42KM COMPLETION TIME IN BOSTON
PREDICTED 42KM COMPLETION TIME IN CHICAGO
PREDICTED 42KM COMPLETION TIME IN LONDON
PREDICTED 42KM COMPLETION TIME IN NEW YORK
PREDICTED 42KM COMPLETION TIME IN TOKYO
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS
PREDICTED 42KM COMPLETION TIME IN BERLIN
PREDICTED 4KM COMPLETION TIME IN BOSTON
PREDICTED 42KM COMPLETION TIME IN CHICAGO
PREDICTED 42KM COMPLETION TIME IN LONDON
PREDICTED 42KM COMPLETION TIME IN NEW YORK
PREDICTED 42KM COMPLETION TIME IN TOKYO
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED 42KM COMPLETION TIME IN BERLIN
PREDICTED 4KM COMPLETION TIME IN BOSTON
PREDICTED 42KM COMPLETION TIME IN CHICAGO
PREDICTED 42KM COMPLETION TIME IN LONDON
PREDICTED 42KM COMPLETION TIME IN NEW YORK
PREDICTED 42KM COMPLETION TIME IN TOKYO
PREDICTED RACE TIME FOR 'COOL' AND 'FLAT' CONDITIONS
PREDICTED RACE TIME FOR 'COOL' AND 'HILLY' CONDITIONS
PREDICTED 42KM COMPLETION TIME IN BERLIN
PREDICTED 4KM COMPLETION TIME IN BOSTON
PREDICTED 42KM COMPLETION TIME IN CHICAGO
PREDICTED 42KM COMPLETION TIME IN LONDON
PREDICTED 42KM COMPLETION TIME IN NEW YORK
PREDICTED 42KM COMPLETION TIME IN TOKYO