# Corbyn Running Calculator - A run time calculator

> Calculate race pace & averages

Canonical page: [https://chrome-stats.com/d/id1131152928](https://chrome-stats.com/d/id1131152928)

## Overview

- **ID:** `id1131152928`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Mark Corbyn
- **Category:** Utilities
- **Rating:** 5.00 / 5 (2 ratings)
- **Version:** 1.1
- **Last updated:** 2017-06-26
- **First published:** 2016-07-07
- **Size:** 2.17 MB
- **Data as of:** 2026-09-03
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/corbyn-running-calculator-a-run-time-calculator/id1131152928)

## Description

Made by a runner, for runners.  The Corbyn Running Calculator app allows you to perform all your training and race pace calculations which are otherwise so tricky and time consuming to calculate.

• Calculate pace required for your target race time
• Calculate your average split time for an interval session
• Find out how far you can run within a given time period
• Work out how fast a competitor ran to achieve their race finish time

As a runner it has always frustrated me that these calculations are so time consuming without a calculator and there are no apps that make it really easy.  So I decided to build an app, and share it for others to enjoy.

Some examples of the kind of calculations I regularly perform are:
• Target race pace
    - I want to run 28k in less than 2 hours
    - Type:  2:00:00 ÷ 28 = [4:17.143]

• Average interval session rep time
    - I did a 500m interval session and want to know what my average rep time was
    - Type:  88.6 + 90.5 + 89 + 87 + 91.3 + 85.4 ÷ 6 = [88.633]

• How far will I run in a given amount of time
    - I have an hour to squeeze in a run, and I know how fast I usually run, but how far will I end up running?
    - Type: 1:00:00 ÷ (Change mode to Time) 4:40 = [12.857]

• Arbitrary race pace calculation
    - I saw a competitor won a 6.3km race in 19:38, what pace did they need to run at to do that?
    - Type: 19:38 ÷ 6.3 = [3:06.984]

• Race finish time calculation
    - If I run a marathon at 4:00 per km, what would my finish time be
    - Type: 4:00 × 42.195 = [2:48:46.8]

I hope you find it as useful as I do.  Happy running!

## Rankings

- #679,191 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1131152928)