Praktické

Kalkulačka polmaratónu

Half Marathon Pace Calculator

Finish Time (H:MM:SS)

What is Half Marathon Calculator?

▾

A half marathon is 21.0975 km (13.1094 miles). The pace calculator converts your target finish time into min/km or min/mile pace.

DigiCalcs delivers precision-engineered tools for engineers and STEM professionals.

Vzorec

▾

f(x)Time = Distance / Pace | Pace = Time / Distance | VO₂ impact ≈ 2.5 min per mile slower than 5K pace

How to Half Marathon Calculator

▾

1Pace per km (sec) = Total seconds / 21.0975
2Convert to MM:SS for practical use
3Speed km/h = 21.0975 / (total seconds / 3600)
4Even splits ±5 sec/km is optimal race pacing

Worked Examples

▾

Example 1

Given:Target 1:55:00

Výsledok:Pace = 5:28/km or 8:47/mile; Speed = 10.97 km/h

Real-World Applications

▾

🏗️

International travel — converting speeds, temperatures, and distances

🔬

Recipe adaptation between metric and imperial quantities

📊

Understanding product specifications from different regions

Half Marathon Pace Reference

▾

Finish time	Per km	Per mile
1:30:00	4:16	6:52
1:45:00	4:58	8:00
2:00:00	5:41	9:09
2:15:00	6:23	10:17
2:30:00	7:06	11:26

Frequently Asked Questions

▾

What is Half Marathon Is 21?

A half marathon is 21. 0975 km (13

How accurate is the Half Marathon Is 21 calculator?

The calculator uses the standard published formula for half marathon is 21. Results are accurate to the precision of the inputs you provide. For financial, medical, or legal decisions, always verify with a qualified professional.

What units does the Half Marathon Is 21 calculator use?

This calculator works with inches, kilometres, miles, kilometres per hour. You can enter values in the units shown — the calculator handles all conversions internally.

What formula does the Half Marathon Is 21 calculator use?

The core formula is: Pace per km (sec) = Total seconds / 21.0975. Each step in the calculation is shown so you can verify the result manually.

References

›Half marathon training — Runner's World

Accuracy-checked

Reviewed October 2026

Our methodology

Získajte týždenné matematické tipy

Pridajte sa k 12 000+ odberateľom, ktorí každý týždeň dostávajú tipy na kalkulačku.

🔒

100% zadarmo

Nikdy bez registrácie

✓

Presné

Overené vzorce

⚡

Okamžité

Výsledky počas písania

📱

Vhodné pre mobily

Všetky zariadenia