Native vs Non-Native Plants for Restoring Degraded Islands

For restoring degraded islands, native plants are almost always the better choice because they are adapted to local conditions, support the island’s unique food webs, and avoid the risks of invasion and hybridization that non-natives often bring. However, non-native plants can play a limited, temporary role in extreme situations where natives have been completely wiped out and erosion is critical. This article explains the science behind that answer, the trade-offs, and how restoration practitioners actually decide.

Formula

The calculator above computes your average running or walking pace from total time and distance. The formula is:

Pace (min/km) = Total Time (minutes) ÷ Distance (km)

Speed (km/h) = Distance (km) ÷ (Total Time (minutes) ÷ 60)

Variables:

• t = total time in minutes (e.g., 120 min)
• d = distance in kilometers (e.g., 10 km)
• Pace = minutes per kilometer (lower is faster)
• Speed = kilometers per hour (higher is faster)

This is the standard formula used by runners and walkers to measure performance. The calculator gives you both pace and speed, so you can compare efforts across different distances.

Worked Example

Using the default values from the calculator: t = 120 minutes, d = 10 km.

1. Pace = 120 ÷ 10 = 12.00 min/km
2. Speed = 10 ÷ (120 ÷ 60) = 10 ÷ 2 = 5.00 km/h

So if you walk 10 km in 2 hours, your average pace is 12 minutes per kilometer, and your average speed is 5 km/h. The calculator shows the same result rounded to two decimals.

When to Use This Calculator

Use this calculator anytime you want to know your average pace or speed for a run, walk, hike, or cycle. It’s especially useful for training plans that specify target paces (e.g., “run 5 km at 6:00 per km�) or for logging workouts. You can also reverse it: if you know your target pace, you can estimate how long a race will take (time = pace × distance).

The result is an average – it does not show variations in speed during the activity. If you run hills or sprint intervals, your actual pace at any moment will differ. For a more detailed analysis, use a GPS watch or app that records splits.

Common Mistakes

• Mixing units: If you enter distance in miles but time in minutes, the pace will be in min/mile, not min/km. Use consistent units. To convert miles to km, multiply by 1.60934.
• Forgetting to convert hours to minutes: If you run for 1.5 hours, use 90 minutes, not 1.5. The calculator expects minutes.
• Rounding too early: Keep full precision until the final answer. For example, 120 ÷ 10 = 12 exactly, but if you had 125 ÷ 10 = 12.5, don’t round to 13 before calculating speed.
• Interpreting pace incorrectly: A lower pace (min/km) means faster. 5 min/km is faster than 6 min/km.

Limits of the Formula

This formula assumes a constant speed. It does not account for rest stops, changes in terrain, or elevation gain. For trail running or hiking, your actual moving time may be longer than the total time if you pause. Use the “moving time� from your watch for a more accurate pace.

The formula also does not include any physiological factors like heart rate or power. It is purely a kinematic calculation. For training purposes, you may want to combine pace with heart rate zones to gauge effort.

Frequently Asked Questions

How do I convert pace from min/km to min/mile?

Multiply the pace in min/km by 1.60934 to get min/mile. For example, 5 min/km × 1.60934 = 8.05 min/mile. Conversely, divide min/mile by 1.60934 to get min/km.

What is a good running pace for a beginner?

For a beginner, a comfortable pace is often around 8–10 min/km (about 13–16 min/mile). This varies widely with age, fitness, and terrain. The best pace is one where you can hold a conversation while running.

How do I calculate my pace if I only know my speed in km/h?

Take the reciprocal of speed and multiply by 60. For example, if speed is 10 km/h, then pace = 60 ÷ 10 = 6 min/km. The calculator does this automatically.

Why does my GPS watch show a different pace?

GPS watches use real-time location data and may include pauses or smooth out fluctuations. They also measure distance differently (e.g., using GPS vs. accelerometer). The calculator gives a simple average based on the total time and distance you enter.

Can I use this calculator for cycling?

Yes, the same formula applies. Just enter the total time and distance for your ride. The result will be your average pace (min/km) and speed (km/h).

What is the difference between pace and speed?

Pace is the time it takes to cover one unit of distance (e.g., minutes per kilometer), while speed is the distance covered per unit of time (e.g., kilometers per hour). Both are common in running; pace is more common in running, speed in cycling.

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in t | Total time (min) | min | 120 | 0
in d | Distance (km) | km | 10 | 0 | 100000
out pace | Average pace (min/km) | min/km | t / d | 2
out speed | Average speed (km/h) | km/h | d / (t / 60) | 2