Solidity Gas Optimization - Save ETH on Every Transaction

Solidity Gas Optimization (2026)

Every gas optimization saves real ETH. Techniques that actually matter.

Storage

• Pack structs: uint128+uint128 = 1 slot (saves 22,100 gas)
• bytes32 over string
• Cache storage reads in memory
• unchecked for safe arithmetic

Functions

• calldata over memory for read-only params
• Custom errors over require strings (~50 gas saved)
• immutable/constant for fixed values
• Batch operations in single tx

Gas Costs

SSTORE cold: 22,100 | warm: 5,000
SLOAD cold:  2,100  | warm: 100
External call: 2,600+ | Log: 375+375*topics
Contract create: 32,000 | Tx base: 21,000

Gas-Optimized Templates

15+ production-ready Solidity templates with gas optimization: ERC-20, NFT, DeFi, DAO, vesting. Deploy scripts + tests + React. $1+.