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Calcimator

Smart Contract Gas Optimization Calculator

Calculate gas savings from smart contract optimizations. Compare current vs. optimized gas usage, estimate ROI on development effort, and analyze storage/calldata reduction impact.

Inputs

Results

Gas reduction (%)

40%

Gas saved per tx200,000
Savings per tx ($)$12.00
Daily savings ($)$1,200.00
Monthly savings ($)$36,000.00
Annual savings ($)$438,000.00
Development cost ($)$6,000.00
Payback period (days)5
Annual ROI (%)7,200%
Storage optimization (gas)60,000
Storage Savings Usd$3.60
Calldata Savings Usd$0.14
Other Optimization Gas137,600
How to Use This Calculator
  1. Enter Current gas per tx, Optimized gas per tx, and Gas price (Gwei).
  2. Set ETH price ($), Daily transactions, and Dev hourly rate ($).
  3. Adjust Estimated dev hours, Storage slots reduced as needed.
  4. Review the Gas reduction (%) (%) result.
  5. Use Gas saved per tx and Savings per tx ($) ($) to inform your decision.

How the result changes with Current gas per tx

Current gas per txGas reduction (%)
3,018,90090.06%
10,513,65097.15%
19,507,35098.46%
27,002,10098.89%

What each input means

Current gas per tx
Gas units consumed by the current unoptimized contract function.
Optimized gas per tx
Expected gas units after optimization (packing, caching, assembly, etc.).
Gas price (Gwei)
Average network gas price in Gwei.
ETH price ($)
Current ETH price for USD cost conversion.
Daily transactions
Average daily transaction count for this contract function.
Dev hourly rate ($)
Cost per hour for Solidity/EVM optimization work.
Estimated dev hours
Estimated hours to implement the gas optimizations.
Storage slots reduced
Number of storage slots eliminated through packing or removal.
Calldata bytes reduced
Reduction in calldata size through tighter encoding.

What each result means

Gas reduction (%)
Percentage reduction in gas consumption.
Gas saved per tx
Absolute gas units saved per transaction.
Savings per tx ($)
USD saved per transaction at current gas and ETH prices.
Daily savings ($)
Total daily cost savings across all transactions.
Monthly savings ($)
Projected monthly gas cost savings.
Annual savings ($)
Projected annual gas cost savings.
Development cost ($)
Total cost of the optimization development work.
Payback period (days)
Days until gas savings recoup the development cost.
Annual ROI (%)
Return on investment for the optimization work over one year.
Storage optimization (gas)
Gas saved from reducing storage slot operations.

How this is calculated

Worked example, using the default values

  1. Identify Input Parameters
    4 parameters
    Current gas per tx = 500000, Optimized gas per tx = 300000, Gas price (Gwei) = 30, ETH price ($) = 2000 = 9 input(s) provided
  2. Calculate Gas reduction
    Gas reduction = (gasReduction / currentGasUsed) * 100
    40 = 40%
  3. Calculate Gas saved per tx
    Gas saved per tx = currentGasUsed - optimizedGasUsed
    200000 = 200000
  4. Calculate Savings per tx
    Savings per tx = currentCostPerTx - optimizedCostPerTx
    12 = $12

Engine last updated . Checked against 2 independently-derived tests — how we verify calculators.

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