What is Transactions Per Second?
Crypto Glossary Definition
The number of transactions that a given blockchain can handle/process each second. This is the primary metric used when thinking about scaling blockchains.
Why Transactions Per Second Matters
TPS measures how many transactions a blockchain can process per second, and is one of the most commonly cited (and most commonly gamed/oversimplified) metrics used to compare blockchains — a high TPS claim often comes with tradeoffs in decentralization or security that raw throughput numbers don't capture.
Transactions Per Second in Practice
A blockchain startup pitching investors leads with a headline claim that its new network can process an enormous number of transactions per second, dramatically outpacing older chains under typical conditions. An experienced due-diligence analyst reviewing the pitch digs past the headline number and finds that the figure was measured under lab conditions using a small number of geographically concentrated validator nodes running on powerful, expensive hardware, a setup that would centralize the network considerably if deployed in production, since ordinary participants couldn't afford to run a validating node under those requirements. She also notes that the claimed TPS assumes simple transfer transactions, not the more complex smart-contract interactions that dominate real-world DeFi and NFT activity, which tend to process at a fraction of a chain's advertised peak throughput. In her report back to the investment committee, she reframes the headline TPS figure as a best-case, controlled-environment number rather than a reliable measure of real-world capacity, and recommends the firm instead look at the network's actual sustained throughput under mainnet conditions, alongside how many independent validators are needed to reach that throughput. The episode becomes a case study she references whenever a project leads its pitch with a large, unqualified TPS number.
Still have questions about Transactions Per Second?
Ask ARIA, our free AI crypto intelligence agent, for a deeper explanation.
Ask ARIA →