# Corbyn Running Calculator - A run time calculator — Calculate race pace & averages

> Runner's tool for calculating race pace, splits, distance, and competitor times. (iPhone/iPad app by Mark Corbyn.)

- Source: https://appshunter.io/ios/app/corbyn-running-calculator-a-run-time-calculator/id1131152928 (this page in markdown: same URL + `.md`)
- Developer: [Mark Corbyn](https://appshunter.io/developer/1131152927)
- Category: Utilities, Sports
- Price: Free
- Rating: 5.00/5 from 2 App Store ratings · 2 written reviews indexed
- Age rating: 4+
- Requires: iOS 9.0 · 2 MB
- Languages: American English
- Released: 2016-07-07
- Data updated: 2026-06-01
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/corbyn-running-calculator-a-run-time-calculator/id1131152928/reviews.md

## What is Corbyn Running Calculator?

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!

## Key features

- Calculate target race pace
- Calculate average interval split time
- Determine distance for a given time
- Calculate competitor race finish times
- Calculate arbitrary race pace
- Calculate race finish time based on pace

## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/corbyn-running-calculator-a-run-time-calculator/id1131152928/reviews.md

### 5/5 — Every coach needs this!

*2017-07-14*

Years ago I found an actual handheld pace calculator.  It was the best tool I could ever have as a coach, and I've recently lost it.  I've just downloaded this app, and upon first use it's exactly what I had. Now, even if I find it, I will always have it because I always have my phone. What a great tool for coaches and runners!

### 5/5 — Fantastic app

*2016-08-05*

Fall in love with running because of this app.

## Frequently asked questions about Corbyn Running Calculator

### What are the main calculation features of Corbyn Running Calculator?

Corbyn Running Calculator allows you to calculate target race pace, average split times for intervals, how far you can run in a given time, competitor race finish times, and your own race finish time based on pace.

### Is Corbyn Running Calculator free to use?

Yes, Corbyn Running Calculator is completely free to download and use. It does not have any associated costs or in-app purchases.

### What devices is Corbyn Running Calculator compatible with?

Corbyn Running Calculator is available for iPhone, iPad, and iPod touch devices.

### How accurate are the calculations in Corbyn Running Calculator?

The app is designed by a runner to perform precise calculations for training and race scenarios. While the app itself is accurate, user input accuracy is crucial for correct results.

### When was Corbyn Running Calculator last updated?

The latest version of Corbyn Running Calculator was released on June 26, 2017. The app was initially released on July 7, 2016.

### What is the age rating for Corbyn Running Calculator?

Corbyn Running Calculator has an age rating of 4+, making it suitable for users of all ages.

### Does Corbyn Running Calculator have ads?

No, Corbyn Running Calculator is ad-free. Users can perform their calculations without any interruptions from advertisements.

### How does Corbyn Running Calculator compare to other running apps?

Corbyn Running Calculator focuses specifically on detailed pace and time calculations, which can be time-consuming with standard calculators. It aims to simplify these specific functions for runners.

## Version history (last 2 releases)

### 1.1 — 2017-06-26

This app has been updated by Apple to display the Apple Watch app icon.

• Renamed by popular demand to Corbyn Running Calculator
• Updated in preparation for iOS 11 release
• Improvements for visually impaired users

### 1.0 — 2016-07-07

No release notes.

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## Related topics

[running calculators](https://appshunter.io/ios/topics/running-calculators)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-06-01.*