Mining calculators wrong

[rasmukri]

So I've been mining BTC for like 5 years now but have started GPU mining in the last few months and am a bit confused on mining calculators.
With BTC the calculators are always quite accurate.
But I mined ETC for 2 months and I made about 0.62 ETC/day and the calculators said I should be making 1.3ETC/day. So I switched to ETH and it says I will only make 0.01 ETC/day but I'm mining 0.025 ETC/day.
Why are calculators so accurate on some and sooooo wildly off on other coins?

[MeistroUK]

What gpus were you using

[sxemini]

So I've been mining BTC for like 5 years now but have started GPU mining in the last few months and am a bit confused on mining calculators.
With BTC the calculators are always quite accurate.
But I mined ETC for 2 months and I made about 0.62 ETC/day and the calculators said I should be making 1.3ETC/day. So I switched to ETH and it says I will only make 0.01 ETC/day but I'm mining 0.025 ETC/day.
Why are calculators so accurate on some and sooooo wildly off on other coins?

You know that ETC has much problems the last weeks? And ETH reward goes up the last weeks because of higher block reward (more transactions per block). So all good i think. Next time, please give us more information (hashrate, gpu´s, miner, pool)

[rdluffy]

This is absolute normal 
Mining calculators are just an estimate, not 100% accurate, because there's a lot of factors: pool, lucky, miner, internet conection, difficulty etc
And these days ETH is having a wonderful time for miners 

[rasmukri]

Ok I guess it's all good, it's just the estimate is always damn near spot on with BTC. So I'd expect a similar result on other coins.
I'm running 5x RX570 and 1x RX470 mining on ethermine with an average of 160 mh/s

[JayDDee]

BTC has the largest sample size of any other crypto, therefore most statistically accurate.