Kalshi

Kalshi Volume

How much trading runs through Kalshi and what's driving it — daily volume, how many trades it takes to get there, and the split between sports, non-sports, and parlays.

All-time volume

contracts

Peak single day

· contracts

How this is calculated

Volume and trade count are summed straight from Kalshi's trade records. The sports/non-sports/parlay split and the category views map each market to a bucket, with unmapped markets kept in "Other" so nothing gets double-counted. Trend lines are trailing 7-day averages.

Kalshi: daily volume (contracts)

Kalshi's daily trading volume, with a 7-day trend line. Flip on event markers to line the spikes up with the days that caused them.

Useful trick: widen the brush to the early years and switch to Log scale — it makes Kalshi's pre-2025 growth readable without burying the recent spike.

Daily bars 7-day average Today (partial) Event overlay

Kalshi: daily trade count

How many individual trades it took — a read on whether the action is coming from a crowd or a few big players.

Useful trick: compare the same date here and on the volume chart — if the dollars jumped more than the trades, that day was a few big tickets, not a crowd.

Daily trades 7-day average Event overlay

Kalshi: sports vs non-sports volume

What's driving the volume — sports, non-sports, and parlays. Switch to a sports-only or non-sports-only view to see the categories inside each.

Useful trick: flip the metric to Fees after you spot a shift — sports and non-sports earn Kalshi very different amounts per contract.

Kalshi: trading activity today, by hour

Contracts by hour (Eastern Time) on the latest day in the feed, split into sports, parlays, and non-sports. The faded bar is still counting.

Kalshi: typical trading week, by hour

The average hour of the week across the selected window. Change both the metric and the segment; the current weekday also shows today's actual pace.

days in this window. Busiest slot: ET, averaging

/hour.

What the weekly average means

Each bar averages one day-of-week × hour combination across the selected window. In-progress hours are excluded. Parlays remain their own segment, and the connected dots on today's row show the latest day's actual values.

Kalshi: open interest (contracts)

Total contracts still open across Kalshi at the end of each day — bets placed but not yet settled. Volume is how much changes hands; open interest is how much money is currently riding on the exchange.

What this measures

Open interest is the number of contracts currently held — bought but not yet sold or settled — added up across every Kalshi market at day's end. Note: this snapshot updates on a periodic schedule rather than live, so the chart ends and may lag the other charts by a day or two.