Distance × time. A clearer race note.

Pace calculator.
Know your pace.
Read your race.

Use the pace calculator to connect distance, time and pace. Read your numbers in kilometres or miles, build an even-split note and keep every assumption in view.

Free to use · No account · Browser calculations

5K10KHALFMARATHON

One route. Three ways to solve it.

Start with the 10 km / 50 minute example, then choose which number you want to calculate.

Your pace deckBrowser only · no account

What would you like to find?

Measured or planned distance

Distance

Distance unit

Total duration

Hours

Minutes

Seconds

Use the duration that matches your distance. Minutes and seconds are separate fields, not decimal minutes.

Split table unit

Even splits per

Average pace

per kilometre

per mile

Total time
Distance
Average speed

Even-distance splits

Constant-pace arithmetic; the final row may be a partial split.
Distance	This split	Cumulative

Optional race-time scenarioCompare another distance using a power-law model

Default exponent 1.06 is a common modeling convention, not an individual calibration. Course, conditions, preparation and endurance are not measured. A planned input time is hypothetical, not evidence of readiness.

Informational arithmetic only. No training prescription, health assessment or race-finish guarantee. Inputs stay in browser memory.

Small inputs. A useful note.

Solve the missing number

Calculate pace from distance and time, finishing time from pace, or distance from duration and pace.

Keep units in sync

Read kilometre and mile pace together. Unit switches preserve the physical distance or rate.

Read the whole schedule

See individual and cumulative even splits, including the shorter segment at the finish.

Inspect a model scenario

Optionally compare another distance with an editable power-law exponent, visibly separate from the main result.

From inputs to a readable finish line

Choose the unknown

Pick pace, time or distance. Use a distance and duration that describe the same interval.

Set units and read

Check kilometre or mile units, then review equivalent pace, speed and the even-split table.

Copy with context

Keep the time definition and assumptions beside your result. Optional predictions are model scenarios.

For the number you want to understand

Understand a result

Calculate an average from your recorded distance and associated time. Label elapsed or moving time.

Compare finish scenarios

Turn a chosen time into an even-distance schedule. The tool does not decide whether the goal is suitable.

Translate a pace note

Convert mile and kilometre pace without treating minutes and seconds as decimal minutes.

Before you copy your note

What can this pace calculator solve?

Choose pace, time or distance as the unknown. Enter the other two quantities, then read equivalent kilometre and mile pace, speed and even-distance splits.

Do the splits describe my actual run?

No. The table applies the calculated average evenly. A final partial segment is labeled, and long tables show an omission note after 100 complete segments.

Is the race-time prediction a guarantee?

No. The optional power-law model uses the stated distance ratio and exponent. It does not assess your preparation, health or race conditions.

Are my inputs uploaded or stored?

No. Calculation fields stay in browser memory. The theme creates no calculation account, upload or persistent history. Copying uses your device clipboard.