21Relay
Bitcoin Utilities

21Relay utility

Node Sync Time Estimator

Estimate an initial Bitcoin node sync range from current chain size, internet speed, storage, CPU capability, uptime and pruning mode.

Live data·Blockchain.com Blockchain Size chart

Detail level

Guided mode keeps the decision focused. Advanced mode reveals extra assumptions.

Keep in mind: Initial block download validates the full chain even in pruned mode; pruning mainly reduces retained disk usage.

Your sync setup

Quick starts

Estimated sync plan

Live chain-size data is required, with a positive connection speed and 1–24 hours of daily uptime.

Methodology, data and limits

Data source: Blockchain.com Blockchain Size chart. No successful update is currently stored.

  • Initial block download validates the full chain even in pruned mode; pruning mainly reduces retained disk usage.
  • CPU, SSD behaviour, database cache, peers, operating system and interruptions can change sync time substantially.
  • The displayed range is a planning model, not a benchmark or completion promise.

Related utilities

Node Storage Calculator

Plan blockchain storage, operating-system space and future headroom.

Open tool

Node Bandwidth Estimator

Estimate initial sync and ongoing node network usage.

Open tool

Node Readiness Check

Check whether your hardware, internet and maintenance plan are ready.

Open tool

Connected workflow

Prepare a Bitcoin node

1. Node Readiness Check
2. Node Storage Calculator
3. Node Bandwidth Estimator
4. Node Sync Time Estimator

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21Relay utilities are educational planning tools, not financial, tax or investment advice. Verify important decisions independently.

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