How it works

A useful distinction

Average pace needs distance weighting

Running 1 km at 5 min/km and 3 km at 7 min/km takes 26 minutes over 4 km: average pace is 6.5 min/km. Simply averaging the two pace values would incorrectly give 6.

Keeping running pace, speed, and splits distinct

Pace expresses time per distance, while speed expresses distance per time. A smaller pace value can therefore describe faster movement. Check the distance units and time format before comparing runs. The split modes summarize checkpoints, while projected finish times extend the entered assumptions to a target distance; they do not predict terrain, fatigue, or race-day conditions.

Find pace: formula and assumptions

Pace = time/distance; speed = distance/time.

The kilometer result also includes mile pace.

Find time: formula and assumptions

Time = distance × pace.

Enter fractional minutes, for example 5.5 for 5 minutes 30 seconds.

Find distance: formula and assumptions

Distance = time/pace.

Steady pace is assumed.

Cumulative split times: formula and assumptions

Segment pace = change in cumulative time / change in cumulative distance.

Distances and times must increase. The first checkpoint is measured from distance zero and time zero.

Projected finish time: formula and assumptions

Projected total=elapsed time×total distance/completed distance.

Assumes the average pace so far continues for the remaining distance.

Pace & speed conversion: formula and assumptions

Speed=distance/time. 1 mile=1.609344 km; 1 yard=0.9144 m.

Enter decimal minutes; 6.5 minutes means 6 minutes 30 seconds.

Pace, splits & speed in multiple units: formula and assumptions

Normalize distance to meters and time to seconds; pace = time / distance.

All eight pace/speed units are available in conversion outputs. Splits use cumulative distance and elapsed time, both strictly increasing. Durations allow hours above 23.

Worked example

Using the Find pace example:

Inputs

Distance (km): 5
Time (minutes): 30

Method

Pace = time/distance; speed = distance/time.

Result

Example result

Pace: 6 minutes/km

Mile pace: 9.66 minutes/mile

Speed: 10 km/h

These are illustrative inputs. Change the values to explore a different scenario.

Formula references

References explain the underlying methods; they do not imply endorsement or individual professional review of Finflo.

Common questions

Should I enter 5.30 for a pace of 5 minutes 30 seconds?

In decimal-minute fields, enter 5.5. The value 5.30 means 5 minutes 18 seconds, not 5 minutes 30 seconds.

Does the finish projection account for slowing down later?

No. It assumes the average pace over the completed distance continues unchanged for the remaining distance.

Prepared by Finflo. See our methodology and editorial policy. Read the relevant professional-advice limitations.

Pace Calculator

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