Does this tool support Bitcoin, Litecoin, or Monero fees?

No. Bitcoin, Litecoin, and Monero do not use EVM gas estimation APIs like eth_feeHistory. They require separate fee estimation logic specific to each network.

Do you store my RPC URL or data?

No. This tool runs in your browser and calls the RPC endpoint directly from your device. InstantQR does not intentionally store your RPC URL or transaction inputs on a server.

Why do public RPC endpoints sometimes fail?

Public RPC endpoints can be rate-limited, overloaded, or blocked by VPNs, browser extensions, or network rules. If a public RPC fails, try your own provider endpoint such as Alchemy, Infura, QuickNode, or another reliable RPC.

EVM Gas Fee Estimator

Live gas fee estimates for major EVM networks including Ethereum, BNB Smart Chain, Base, Arbitrum, Optimism, Polygon, Avalanche, Gnosis, Celo, Scroll, Linea, zkSync Era, and KCC. Runs locally in your browser.

⚡ Live estimates ⛽ EIP-1559 + legacy fallback 🔒 Privacy-first ✅ Free

Ready

Network

Gas units (est. transaction cost)

Common: 21,000 (simple transfer), 80,000–200,000 (swaps), 200,000+ (complex).

RPC URL (editable)

Tip: public RPCs can be rate-limited. If you get errors, paste an Alchemy, Infura, QuickNode, or another provider endpoint.

Actions

Auto refresh (15s)

Last updated: —

Note: BTC, LTC, and Monero do not use EVM gas estimation APIs, so they are not part of this page. They need a separate non-EVM network fee estimator.

Slow Budget

Max fee—

Priority fee—

Estimated total—

—

Lower-percentile tip from recent blocks.

Standard Recommended

Max fee—

Priority fee—

Estimated total—

—

Median tip from recent blocks.

Fast High priority

Max fee—

Priority fee—

Estimated total—

—

Higher-percentile tip from recent blocks.

How it works: This tool queries eth_feeHistory when available to estimate priority fees and reads the latest base fee. If a chain or RPC does not support fee history, it falls back to eth_gasPrice.

EVM Gas Fee Estimator FAQ

How do gas fees work on EVM networks?

EVM chains use gas to price network computation and transaction inclusion. Many modern networks support EIP-1559, where a base fee changes with demand and a priority fee helps transactions confirm faster.

Which networks are supported?

This page supports Ethereum, Arbitrum, Optimism, Base, Polygon, BNB Smart Chain, Avalanche C-Chain, Gnosis, Celo, Scroll, Linea, zkSync Era, and KCC.

Why are BTC, LTC, and Monero not included?

Bitcoin, Litecoin, and Monero do not use the EVM gas model or JSON-RPC methods used here. They require their own network-specific fee estimator logic.

Do you store my RPC URL or transaction data?

No. This tool runs in your browser and sends requests directly to the RPC endpoint you choose. InstantQR does not intentionally store your RPC input on a server.

Why can a public RPC fail?

Public endpoints may be overloaded, rate-limited, blocked, or temporarily unavailable. If that happens, try a different RPC or use your own provider endpoint.

WiFi QR Generator · URL QR Generator · Crypto Profit Calculator

About · Privacy · Terms · Contact