How far is 100 kilometres?

Compare anything from 0.001 km to Neptune's orbit.

Seoul–Daejeon100 km

The approximate straight-line distance between Seoul and Daejeon.

The references just below and above

Nearby references are selected by logarithmic distance, not linear spacing.

How long would this journey take?

Calculated as uninterrupted travel at representative average cruising speeds.

Real travel time varies with route, stops, weather and operating conditions.

Objects move along logarithmic spacing, while size is compressed from the real ratio to remain legible.

Artwork and diagram notes

Object, landmark and planet artwork is original AI-generated imagery made for ScaleTrip. Maps use public-domain Natural Earth boundaries. Illustrations stay recognizable through logarithmic visual compression; they are not literal scale drawings.

Natural Earth — public domain

Direct answer

How far is 100 kilometres?

One hundred kilometres equals 100,000 metres or about 62.14 miles. It is a regional journey rather than a local trip.

km100

m100,000

mi62.1371

Closest ScaleTrip references

Seoul–Daejeon140 km · 0.71×
The approximate straight-line distance between Seoul and Daejeon.
Taiwan width144 km · 0.69×
A representative east-to-west width across Taiwan.
Channel Tunnel50.45 km · 1.98×
The rail tunnel linking England and France beneath the sea.

Travel time at constant speed

Mode	Representative speed	Calculated time
Walking	5 km/h	20 hr
Car	100 km/h	1 hr
High-speed train	300 km/h	20 min
Airliner	900 km/h	7 min
Spacecraft	28,000 km/h	13 sec

Real travel time varies with route, stops, weather and operating conditions.