What this calculator does
This tool converts a walking distance into a walking time. It is built around a Japanese real-estate convention: in Japan, property advertisements state distance to the nearest station as "X minutes on foot," computed from the road distance using a fixed standard walking speed of 80 meters per minute. This rule comes from Japan's Fair Competition Code for Real Estate Advertising. The default speed here (80 m/min) reproduces that standard, but because the underlying math (time = distance / speed) is universal, you can change the speed and units to suit any country or pace.
How to use it
Enter the distance and pick its unit (meters, kilometers, feet, or miles). Use the road/path distance you actually walk, not the straight-line distance. Then enter your walking speed and its unit (m/min, km/h, or mph). The calculator converts everything to meters and minutes, divides distance by speed, and shows the result down to the second, plus the total minutes, total seconds, and a whole-days component for long routes.
The formula explained
First, distance is converted to meters and speed to meters per minute. Then total minutes = distance(m) / speed(m/min), and total seconds = total minutes x 60. The readable time splits total seconds into hours (floor of seconds/3600), minutes, and seconds. Days = floor(total seconds / 86400).
$$\text{Time (min)} = \frac{\text{Distance} \cdot f_d}{\text{Speed} \cdot f_s}$$
$$\begin{gathered} \text{Time (min)} = \frac{d_m}{v_m} \\[1.5em] \text{where}\quad \left\{ \begin{aligned} d_m &= \text{Distance} \times f_d \\ v_m &= \text{Speed} \times f_s \end{aligned} \right. \end{gathered}$$
Worked example
A property is 1200 m from the station; standard speed is 80 m/min. Total minutes = $$\frac{1200}{80} = 15 \text{ minutes} = 900 \text{ seconds},$$ so the walk is "15 min 0 sec." Under the Japanese advertising convention this property would be listed as a 15-minute walk.
FAQ
Why 80 m/min? It is the legally fixed standard walking speed used for Japanese real-estate ads, roughly 4.8 km/h.
Does it include traffic-light waits? No. Waiting time at signals or railroad crossings is not counted, matching the standard.
Why isn't the time rounded up like an ad? Japanese ads round up to whole minutes, but this tool gives the precise time to the second so you can interpret it yourself.
