Bitcoin Batch Transaction Calculator

What is Transaction Batching?

Transaction batching combines multiple Bitcoin payments into a single transaction. Instead of creating separate transactions for each recipient (each with its own overhead), batching shares the fixed costs across all payments, significantly reducing total fees.

This technique is commonly used by exchanges, payment processors, and businesses that regularly send Bitcoin to multiple addresses.

How Does Batching Save Money?

Every Bitcoin transaction has a fixed overhead cost (about 10.5 vBytes) plus the cost of inputs and outputs. When you send individual transactions, each one pays the full overhead plus its own input cost. With batching, you pay the overhead only once and share a single input across all payments.

The savings formula:

• Individual: N transactions x (overhead + 1 input + 2 outputs) each
• Batched: 1 transaction x (overhead + 1 input + N+1 outputs)
• Savings grow with more recipients: 10 recipients can save 70%+ on fees

Address Types and Sizes

Different Bitcoin address types have different sizes, which affects transaction fees:

• Native SegWit (bc1q...): 68 vB input, 31 vB output: most common, good efficiency
• Taproot (bc1p...): 57.5 vB input, 43 vB output: newest, best for complex scripts
• Nested SegWit (3...): 91 vB input, 32 vB output: backward-compatible SegWit
• Legacy (1...): 148 vB input, 34 vB output: oldest, least efficient

Frequently Asked Questions

Who should use transaction batching?

Batching is most beneficial for businesses and services that send multiple payments regularly: exchanges processing withdrawals, payroll systems, mining pools distributing rewards, or any service paying multiple recipients at once.

Does batching affect confirmation time?

No. A batched transaction is confirmed just like any other transaction. The same fee rate (sat/vB) determines priority. Since the total fee is lower, batching actually frees up block space for everyone.

Are there privacy concerns with batching?

Yes. Batching reveals that all outputs in the transaction came from the same sender. For businesses, this is usually acceptable. For privacy-sensitive use cases, individual transactions with coin control may be preferred.

What is the maximum number of outputs in a batch?

There is no hard limit on outputs, but practical limits exist. Very large transactions may exceed the standard 100 kvB size limit. Most batching implementations handle 50-200 recipients per transaction comfortably.