Dust

What is Dust?

Dust is the tiny leftover balance on a blockchain that costs more to move than it’s worth. Think coins stuck in a couch cushion, only digital and a bit more stubborn.

How Dust works

Picture a normal send, airdrop, or tiny change from a swap. That sliver that’s too small to move without losing money to fees is what people call Dust.

• Step 1: Small outputs are created from change, rewards, or micro airdrops.
• Step 2: Your wallet lists these tiny fragments as separate pieces of value.
• Step 3: Moving them costs more than they’re worth because transaction fees outpace the amount.
• Step 4: Some wallets let you consolidate multiple tiny pieces when network traffic is calm.
• Step 5: Attackers may send tiny amounts to many wallet addresses and watch who spends them together to guess which ones belong to the same person.

That’s pretty much it.

Why Dust Matters

If you use cryptocurrency regularly, this tiny stuff has outsized effects.

• Benefit: Knowing what Dust is helps you avoid wasting money trying to move it.
• Perspective: It’s a privacy wrinkle too, since combining small outputs can reveal patterns.
• Relevance: You’ll see it in wallets, swaps, airdrops, and even on exchanges.

Key Characteristics of Dust

Highlight the core traits you’ll spot:

• Tiny: The value is so small that moving it makes no financial sense.
• Relative: What counts as Dust depends on fee rates and the chain.
• Traceable: Combining Dust outputs can hint at wallet ownership links.
• Manageable: Many wallets offer batch send or consolidation tools.

How is Dust calculated?

On Bitcoin, a common rule of thumb compares the output value to the fee required to spend it later. If spending the output would cost as much or more than the output itself, it’s treated as Dust by standard policy.

A simple version is:

Dust threshold = 3 × min_relay_fee_per_byte × spend_size_in_bytes

If an output is at or below this threshold, nodes may treat it as Dust. For typical pay to pubkey hash outputs, that threshold often lands around 546 sats at common fee settings, and it differs for segwit styles.

Variations

Same idea, different vibes:

• Wallet: Tiny outputs sitting in your personal wallet that are not worth moving yet.
• Exchange: Small residual balances after trades that fall below the platform minimum.
• Attack: A dusting attack sends tiny amounts to many addresses to study spending links.

Example

You receive 300 sats as change, then see that sending it would cost 500 sats in fees, so you leave it untouched until fees drop and you can batch it with other small pieces.

Fun Fact

On Bitcoin, many wallets highlight around 546 sats as a common Dust threshold for classic outputs, while native segwit styles can be lower because they use fewer bytes.

Wrap-Up

Short version: Dust is tiny value that’s uneconomical to move, so treat it like pocket lint and sweep it up when fees are calm.