Solana Timing, Measured

Measured directly from Solana mainnet RPC, next to what the official docs say.

ITEMMAINNET, MEASUREDOFFICIAL DOCSHOW IT IS COMPUTED

Slot time218ms60-minute average400msAverage of the last 60 one-minute performance samples

Blockhash expiry32.6s150 slots60-90s150 slots × measured slot time

Until confirmedunder 1 slotsame slot—processed slot − confirmed slot at the same moment × slot time

Until finalized7.0s32 slots—processed slot − finalized slot at the same moment × slot time

Alpenglow consensus switch10-21 14:37 UTC2,941,887 slots leftOct 21 2026 ~15:00 UTCSlots left until 459,653,000 × slot time

Measured 2026-10-14 04:48 UTC · epoch 1,057 · slot 456,711,113 · api.mainnet-beta.solana.com solana-core 4.3.0