Geo for Developers: What Makes a Page Worth Citing?

For developers, a page is worth citing when it is authoritative, accurate, and stable, meaning it comes from a trusted source, its information can be verified, and its content is unlikely to change without notice. This article explains the concrete criteria to evaluate before you add a URL to your code comments, documentation, or research notes.

Formula

The calculator above works out your average pace and speed for a given time and distance. The formulas are:

• Pace (min/km) = Total time (minutes) ÷ Distance (km)
• Speed (km/h) = Distance (km) ÷ (Total time (minutes) ÷ 60)

Where t is the total time in minutes, and d is the distance in kilometers. The pace is the number of minutes it takes to cover one kilometer; the speed is how many kilometers you cover in one hour.

Worked Example

Using the default values: you run for 30 minutes and cover 5 kilometers.

1. Pace = 30 ÷ 5 = 6.00 min/km
2. Speed = 5 ÷ (30 ÷ 60) = 5 ÷ 0.5 = 10.00 km/h

The calculator returns a pace of 6.00 min/km and a speed of 10.00 km/h.

When to Use This Calculator

Use this tool when you want a quick, consistent way to convert a run, walk, or cycle time and distance into pace or speed. It is useful for training logs, race planning, or comparing efforts across different distances. The result is an average – it does not account for hills, stops, or variations in effort.

How to Read the Result

A lower pace (min/km) means you are faster – you take fewer minutes to cover each kilometer. A higher speed (km/h) also means faster. For example, a pace of 5:00 min/km equals 12 km/h. The calculator gives the pace in decimal minutes (e.g., 6.00), but you can convert the fractional part to seconds by multiplying by 60 (0.00 × 60 = 0 seconds, so 6:00 exactly).

Common Mistakes

• Mixing units: if you enter distance in miles but expect km/h, the result will be wrong. Convert miles to kilometers (1 mile = 1.60934 km) first.
• Using seconds instead of minutes: the formula expects minutes. If you have 30 minutes and 30 seconds, enter 30.5, not 30.5 seconds.
• Rounding too early: keep at least two decimal places during calculation to avoid a noticeable error in the final pace.

Limitations of the Formula

This is a simple average. It does not account for elevation gain, terrain, wind, or rest breaks. For a hilly trail run, your actual effort per kilometer varies, but the average pace is still a useful summary. Also, the formula assumes a constant speed – if you sprint at the end, the average pace will be lower than your typical cruising pace.

Frequently Asked Questions

How do I convert pace to speed?

Divide 60 by the pace in minutes per kilometer. For example, a pace of 5 min/km gives 60 ÷ 5 = 12 km/h. Conversely, speed in km/h converts to pace by dividing 60 by the speed: 60 ÷ 12 = 5 min/km.

What is a good running pace for a beginner?

There is no universal answer – it depends on age, fitness, and experience. A comfortable conversational pace for a beginner might be 7–9 min/km (about 6.7–8.6 km/h). It is better to focus on effort than a specific number.

Does this calculator work for walking?

Yes, the formula is the same. A typical walking pace is 10–15 min/km (4–6 km/h). Just enter your walking time and distance.

Why is my pace shown as 6.00 instead of 6:00?

The calculator outputs decimal minutes. To get minutes and seconds, take the decimal part (0.00) and multiply by 60. If the result were 6.25, that would be 6 minutes and 0.25 × 60 = 15 seconds, so 6:15.

Can I use this for cycling?

Yes, the same math applies. Cyclists often use speed (km/h) more than pace, but the calculator gives both.

Related

• AI Boom vs. Dot-Com Crash: What Developers Should Watch
• AI Agent Harness vs Framework: What’s the Difference?
• OpenAI Decisions API: Practical Implementation Guide

in t | Total time | min | 30 | 1 | 1440
in d | Distance | km | 5 | 0.1 | 1000
out pace | Average pace | min/km | t / d | 2
out speed | Average speed | km/h | d / (t / 60) | 2