You will need some details from the blockchain you are calculating. There are a few things you need to know. This is an estimation with many blockchains the coins only staking are an estimation. This means that numbers for staking are usually not always, better than the calculator. The calculator should be a minimum estimation of rewards. Know Crypto Show nor TheVoice assume any liability for errors in calculations.
You may also find that if you use a method of splitting your UTXO qty that your averages will swing positive by a few percentage points even higher. Though some blockchains have mechanisms in place to manager UTXO size and qty.