無料オンラインランニングペース計算機
ペース、速度、推定完走時間を計算します。
Frequently Asked Questions
How do I calculate my running pace?
Pace = Time ÷ Distance. For a 5K (3.1 miles) in 25 minutes: 25 ÷ 5 = 5:00 min/km or 25 ÷ 3.1 = 8:04 min/mile. The calculator computes this instantly from any two values.
How do I convert min/km to min/mile?
Multiply min/km by 1.60934. So 5:00 min/km = 5 × 1.609 = 8:03 min/mile. The tool shows both units simultaneously after calculation.
What is a good running pace for a 5K?
Average recreational runner: 10–12 min/mile (6–7:30 min/km). Solid amateur: 8–9 min/mile (5–5:36 min/km). Good club runner: 6–7 min/mile (3:44–4:21 min/km). Elite/competitive: under 5 min/mile (3:06 min/km).
How do I predict my marathon time from a 5K or 10K time?
Use the race predictor tab. A common formula: Marathon time ≈ 5K time × 9.27. This is approximate — marathon pace is significantly slower than 5K pace due to endurance demands. The predictor uses the Riegel formula for more accuracy.
What is a negative split and how do I run one?
A negative split means running the second half of a race faster than the first. It's the most efficient race strategy — starting slightly slower than goal pace prevents early fatigue. Set your first-half goal pace 5–10 seconds/km slower than average target.
Is the ランニングペース計算機 free to use?
Yes, the ランニングペース計算機 on Allio Tools is completely free with no sign-up or registration required. It works directly in your browser.
How does the ランニングペース計算機 work?
ペース、速度、推定完走時間を計算します。 No data is sent to a server — everything runs locally in your browser for maximum privacy and speed.
Do I need to install anything to use the ランニングペース計算機?
No installation needed. The ランニングペース計算機 runs entirely in your web browser on any device — desktop, tablet, or mobile.
Is my data safe when using the ランニングペース計算機?
Completely safe. The ランニングペース計算機 processes everything locally in your browser. No input data, results, or usage information is ever transmitted to or stored on any server.
Does the ランニングペース計算機 work offline?
After the page loads for the first time, the ランニングペース計算機 works without an internet connection for all client-side processing. Tools that fetch live external data (such as DNS or network lookups) require an active connection.
How accurate are the ランニングペース計算機 calculations?
The ランニングペース計算機 uses clinically validated formulas such as the Mifflin–St Jeor or Harris–Benedict equations where applicable. Results are population-based estimates and can differ from measured values by 10–20% for individuals with atypical body composition. See our <a href="/methodology/">Methodology page</a> for full formula sources and references. Consult a qualified healthcare professional before making medical or dietary decisions.
Which formula does the ランニングペース計算機 use?
The ランニングペース計算機 uses an established, peer-reviewed formula endorsed by leading health organisations such as the WHO, CDC, or NIH where applicable. The specific formula is chosen for its validated accuracy across diverse adult populations under normal conditions.
Does the ランニングペース計算機 work on all browsers?
Yes. The ランニングペース計算機 is built with standard browser APIs and works on all modern browsers including Chrome, Firefox, Safari, and Edge — on both desktop and mobile. No plugins, extensions, or third-party software are required.
How do I save or export my results from the ランニングペース計算機?
Select and copy the result text to paste into any document or app. For image tools, a Download button saves the file directly to your device. Your browser's built-in screenshot function also captures results quickly. No account or login is required.