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FastestThings

Men's 400 Meters

Jeremy Wariner

American athlete. men's 400 m mark of 43.45 seconds at Osaka on August 31, 2007, the personal best on the World Athletics all-time list.

Jeremy Wariner's race time is 43.45 s, an official figure.

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Race time

43.45s

men's 400 m, Osaka. One personal best per athlete.

OfficialWorld Athletics (opens source in a new tab)

Quick answers

People also ask

What is Jeremy Wariner's race time?

Jeremy Wariner's race time is 43.45 s, an official figure.

Is that figure claimed or verified?

Jeremy Wariner is labeled Official. Ratified by a governing body such as the FIA, World Athletics or Guinness World Records.

What is the source?

The figure cites World Athletics, “400 metres men, senior, outdoor all-time list.”

Where does Jeremy Wariner rank?

Jeremy Wariner is 7th of 9 on Fastest Men's 400 m, in a tie.

Mechanism

Why it's so fast

Jeremy Wariner's mark is a men's 400 meters of 43.45 seconds at Osaka on August 31, 2007. That is one lap. Dividing 400 meters by the official time is about 20.6 mph. No 200-meter split is given, so the pace inside the lap is not described here.

Time
43.45 s
Average
about 20.6 mph
Place
Osaka
Date
August 31, 2007

  1. One lap, one clock

    Jeremy Wariner's 43.45 is the time from the gun to the finish of a full lap at Osaka on August 31, 2007. A 400 is long enough that how the effort is divided matters, and this entry does not keep the split that would show it. What counts is the official time only.

  2. 20.6 mph across the lap

    400 meters in 43.45 seconds is about 20.6 mph for the whole lap. That is much slower than a 100-meter average because the distance is four times as long. Jeremy Wariner's figure is the personal best on the all-time list, not a radar peak on the back straight.

Provenance

Every measurement

Claimed, measured and official figures side by side, each with its source. The ranked figure is marked.

  1. 43.45sRanked figure

    men's 400 m, Osaka. One personal best per athlete.

    Official
    World Athletics (opens source in a new tab)

Reference

Specs

Country
United States
Event
men's 400 m
Mark
43.45 s
Venue
Osaka

Context

Background

Jeremy Wariner's ranked men's 400 m time is 43.45 seconds at Osaka on August 31, 2007. World Athletics, Athletic Stats (refreshed October 5, 2026) and Track & Field News say that time and date.

The list is one event. A mark from another distance is a different page, with its own slug. Wind above +4.5 mph (+2.0 m/s) is not legal. Lower is faster.

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