# Pace Calculator

> Calculate pace, elapsed time, or distance and generate cumulative split estimates in kilometers, miles, meters, or yards.

Page: https://askcalculators.com/calculator/pace-calculator/
Definition: https://askcalculators.com/calculator/pace-calculator/definition.json
JSON Schema: https://askcalculators.com/calculator/pace-calculator/schema.json
Version: 2.0.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/calculator/pace-calculator/?solveFor=pace&distanceUnit=km&distance=5&hours=0&minutes=25&seconds=0&paceMinutes=5&paceSeconds=0

## Inputs
- solveFor: Calculate; type=select; required; default=pace; values=pace|time|distance
- distanceUnit: Distance unit; type=select; required; default=km; values=km|mi|m|yd
- distance: Distance; type=number; required; default=5; min=0.001; max=100000
- hours: Elapsed time: hours; type=number; required; default=0; min=0; max=999
- minutes: Elapsed time: minutes; type=number; required; default=25; min=0; max=59
- seconds: Elapsed time: seconds; type=number; required; default=0; min=0; max=59.99
- paceMinutes: Pace: minutes per selected unit; type=number; required; default=5; min=0; max=999
- paceSeconds: Pace: seconds per selected unit; type=number; required; default=0; min=0; max=59.99

## Outputs
- pace: Pace; format=text; primary
- time: Elapsed time; format=text
- distanceResult: Distance; format=text
- speedKph: Speed; format=number
- speedMph: Speed; format=number
- marathonTime: Marathon time at this pace; format=text

## Formula
pace = time ÷ distance; time = pace × distance; distance = time ÷ pace, after converting to one consistent distance unit.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: Race projections assume a constant pace and do not account for terrain, fatigue, weather, or stops.